A hang glider, sudden unexpected lift to 25,000 feet altitude, what could do this? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern) The network's official Twitter account is up and running again. What content…At great altitude, what conditions are needed to support a human community?Reducing atmospheric pressure on Snowball EarthWhat would the weather on this continent be like?What could cause a sudden dip in magnetosphere?What would be the major weather patterns on this map?What could make a planet have regular extreme weather?What could cause sudden localized atmospheric pressure change?Could I get some guidance on this map in progress?How high in altitude could a fog reasonably exist?At what altitudes would clouds form to produce rain on this world and with what general severity?Is this sudden global cooling scenario plausible?Could this planet exist?
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A hang glider, sudden unexpected lift to 25,000 feet altitude, what could do this?
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
The network's official Twitter account is up and running again. What content…At great altitude, what conditions are needed to support a human community?Reducing atmospheric pressure on Snowball EarthWhat would the weather on this continent be like?What could cause a sudden dip in magnetosphere?What would be the major weather patterns on this map?What could make a planet have regular extreme weather?What could cause sudden localized atmospheric pressure change?Could I get some guidance on this map in progress?How high in altitude could a fog reasonably exist?At what altitudes would clouds form to produce rain on this world and with what general severity?Is this sudden global cooling scenario plausible?Could this planet exist?
$begingroup$
This is the third in a series of 5 (at this point) questions. It's not relevant to this question, but for anyone who's curious this was the first, this the second.
Conditions for this question are:
Earth-normal atmospheric pressure/content. (Or close)
I'm aware that over 38,000 feet has been achieved by exploiting thermals. This slow and steady way is not what I need.
I need the ascent to be sudden and unexpected (for an arguably inexperienced pilot), be it; meteorological, geothermal or by some other (not fantasy) means.
It should not kill the pilot - if you can plausably argue a volcanic erruption - then fine but the pilot must survive (unconsciousness is just fine though).
Any landscape type can be specified in supporting arguments within the answer, sea nearby, desert, mountains, geisers, volcanoes, icefields - anything that could feasably contribute to the desired sudden lift.
A hang glider, the pilot taken by surprise, there is a sudden unexpected lift to 25,000 feet altitude, what could do this?
science-based geology weather volcanoes
asked Apr 1 at 20:09
AgrajagAgrajag
7,19411650
$endgroup$
|
show 2 more comments
$begingroup$
This is the third in a series of 5 (at this point) questions. It's not relevant to this question, but for anyone who's curious this was the first, this the second.
Conditions for this question are:
Earth-normal atmospheric pressure/content. (Or close)
I'm aware that over 38,000 feet has been achieved by exploiting thermals. This slow and steady way is not what I need.
I need the ascent to be sudden and unexpected (for an arguably inexperienced pilot), be it; meteorological, geothermal or by some other (not fantasy) means.
It should not kill the pilot - if you can plausably argue a volcanic erruption - then fine but the pilot must survive (unconsciousness is just fine though).
Any landscape type can be specified in supporting arguments within the answer, sea nearby, desert, mountains, geisers, volcanoes, icefields - anything that could feasably contribute to the desired sudden lift.
A hang glider, the pilot taken by surprise, there is a sudden unexpected lift to 25,000 feet altitude, what could do this?
science-based geology weather volcanoes
asked Apr 1 at 20:09
AgrajagAgrajag
7,19411650
$endgroup$
2
$begingroup$
I'd swear I read an article several years ago about someone over Australia having something like this happen.
$endgroup$
– Michael Richardson
Apr 1 at 21:37
2
$begingroup$
Nevermind. Chasly's answer mentions this right away.
$endgroup$
– Michael Richardson
Apr 1 at 22:24
4
$begingroup$
Gliding altitude records are not set using thermals, but by "wave riding" the airflow over mountain ranges. Just like an airfoil, the profile of a line of hills affects the air flow up to 10 times the height of the hills themselves. In the right weather conditions these flows can remain stable for several days, and nights (unlike thermals which only exist during the day). Even in the UK with hills of only a few thousand feet, altitudes of 20,000ft are not difficult to achieve - except for the problem of keeping out of commercial controlled airspace.
$endgroup$
– alephzero
Apr 1 at 23:54
1
$begingroup$
pedantry: thermals can exist at night, if there is a heat source on the ground. (a wildfire or lava flow would do nicely :))
$endgroup$
– Jeremy Friesner
Apr 2 at 3:16
$begingroup$
@Michael Richardson Possibly a canopy (trike or parachute) during a thunderstorm.
$endgroup$
– mckenzm
Apr 2 at 4:19
|
show 2 more comments
$begingroup$
This is the third in a series of 5 (at this point) questions. It's not relevant to this question, but for anyone who's curious this was the first, this the second.
Conditions for this question are:
Earth-normal atmospheric pressure/content. (Or close)
I'm aware that over 38,000 feet has been achieved by exploiting thermals. This slow and steady way is not what I need.
I need the ascent to be sudden and unexpected (for an arguably inexperienced pilot), be it; meteorological, geothermal or by some other (not fantasy) means.
It should not kill the pilot - if you can plausably argue a volcanic erruption - then fine but the pilot must survive (unconsciousness is just fine though).
Any landscape type can be specified in supporting arguments within the answer, sea nearby, desert, mountains, geisers, volcanoes, icefields - anything that could feasably contribute to the desired sudden lift.
A hang glider, the pilot taken by surprise, there is a sudden unexpected lift to 25,000 feet altitude, what could do this?
science-based geology weather volcanoes
asked Apr 1 at 20:09
AgrajagAgrajag
7,19411650
$endgroup$
This is the third in a series of 5 (at this point) questions. It's not relevant to this question, but for anyone who's curious this was the first, this the second.
Conditions for this question are:
Earth-normal atmospheric pressure/content. (Or close)
I'm aware that over 38,000 feet has been achieved by exploiting thermals. This slow and steady way is not what I need.
I need the ascent to be sudden and unexpected (for an arguably inexperienced pilot), be it; meteorological, geothermal or by some other (not fantasy) means.
It should not kill the pilot - if you can plausably argue a volcanic erruption - then fine but the pilot must survive (unconsciousness is just fine though).
Any landscape type can be specified in supporting arguments within the answer, sea nearby, desert, mountains, geisers, volcanoes, icefields - anything that could feasably contribute to the desired sudden lift.
A hang glider, the pilot taken by surprise, there is a sudden unexpected lift to 25,000 feet altitude, what could do this?
science-based geology weather volcanoes
science-based geology weather volcanoes
asked Apr 1 at 20:09
AgrajagAgrajag
7,19411650
asked Apr 1 at 20:09
AgrajagAgrajag
7,19411650
asked Apr 1 at 20:09
AgrajagAgrajag
7,19411650
asked Apr 1 at 20:09
AgrajagAgrajag
7,19411650
asked Apr 1 at 20:09
AgrajagAgrajag
7,19411650
7,19411650
2
$begingroup$
I'd swear I read an article several years ago about someone over Australia having something like this happen.
$endgroup$
– Michael Richardson
Apr 1 at 21:37
2
$begingroup$
Nevermind. Chasly's answer mentions this right away.
$endgroup$
– Michael Richardson
Apr 1 at 22:24
4
$begingroup$
Gliding altitude records are not set using thermals, but by "wave riding" the airflow over mountain ranges. Just like an airfoil, the profile of a line of hills affects the air flow up to 10 times the height of the hills themselves. In the right weather conditions these flows can remain stable for several days, and nights (unlike thermals which only exist during the day). Even in the UK with hills of only a few thousand feet, altitudes of 20,000ft are not difficult to achieve - except for the problem of keeping out of commercial controlled airspace.
$endgroup$
– alephzero
Apr 1 at 23:54
1
$begingroup$
pedantry: thermals can exist at night, if there is a heat source on the ground. (a wildfire or lava flow would do nicely :))
$endgroup$
– Jeremy Friesner
Apr 2 at 3:16
$begingroup$
@Michael Richardson Possibly a canopy (trike or parachute) during a thunderstorm.
$endgroup$
– mckenzm
Apr 2 at 4:19
|
show 2 more comments
2
$begingroup$
I'd swear I read an article several years ago about someone over Australia having something like this happen.
$endgroup$
– Michael Richardson
Apr 1 at 21:37
2
$begingroup$
Nevermind. Chasly's answer mentions this right away.
$endgroup$
– Michael Richardson
Apr 1 at 22:24
4
$begingroup$
Gliding altitude records are not set using thermals, but by "wave riding" the airflow over mountain ranges. Just like an airfoil, the profile of a line of hills affects the air flow up to 10 times the height of the hills themselves. In the right weather conditions these flows can remain stable for several days, and nights (unlike thermals which only exist during the day). Even in the UK with hills of only a few thousand feet, altitudes of 20,000ft are not difficult to achieve - except for the problem of keeping out of commercial controlled airspace.
$endgroup$
– alephzero
Apr 1 at 23:54
1
$begingroup$
pedantry: thermals can exist at night, if there is a heat source on the ground. (a wildfire or lava flow would do nicely :))
$endgroup$
– Jeremy Friesner
Apr 2 at 3:16
$begingroup$
@Michael Richardson Possibly a canopy (trike or parachute) during a thunderstorm.
$endgroup$
– mckenzm
Apr 2 at 4:19
2
2
$begingroup$
I'd swear I read an article several years ago about someone over Australia having something like this happen.
$endgroup$
– Michael Richardson
Apr 1 at 21:37
$begingroup$
I'd swear I read an article several years ago about someone over Australia having something like this happen.
$endgroup$
– Michael Richardson
Apr 1 at 21:37
2
2
$begingroup$
Nevermind. Chasly's answer mentions this right away.
$endgroup$
– Michael Richardson
Apr 1 at 22:24
$begingroup$
Nevermind. Chasly's answer mentions this right away.
$endgroup$
– Michael Richardson
Apr 1 at 22:24
4
4
$begingroup$
Gliding altitude records are not set using thermals, but by "wave riding" the airflow over mountain ranges. Just like an airfoil, the profile of a line of hills affects the air flow up to 10 times the height of the hills themselves. In the right weather conditions these flows can remain stable for several days, and nights (unlike thermals which only exist during the day). Even in the UK with hills of only a few thousand feet, altitudes of 20,000ft are not difficult to achieve - except for the problem of keeping out of commercial controlled airspace.
$endgroup$
– alephzero
Apr 1 at 23:54
$begingroup$
Gliding altitude records are not set using thermals, but by "wave riding" the airflow over mountain ranges. Just like an airfoil, the profile of a line of hills affects the air flow up to 10 times the height of the hills themselves. In the right weather conditions these flows can remain stable for several days, and nights (unlike thermals which only exist during the day). Even in the UK with hills of only a few thousand feet, altitudes of 20,000ft are not difficult to achieve - except for the problem of keeping out of commercial controlled airspace.
$endgroup$
– alephzero
Apr 1 at 23:54
1
1
$begingroup$
pedantry: thermals can exist at night, if there is a heat source on the ground. (a wildfire or lava flow would do nicely :))
$endgroup$
– Jeremy Friesner
Apr 2 at 3:16
$begingroup$
pedantry: thermals can exist at night, if there is a heat source on the ground. (a wildfire or lava flow would do nicely :))
$endgroup$
– Jeremy Friesner
Apr 2 at 3:16
$begingroup$
@Michael Richardson Possibly a canopy (trike or parachute) during a thunderstorm.
$endgroup$
– mckenzm
Apr 2 at 4:19
$begingroup$
@Michael Richardson Possibly a canopy (trike or parachute) during a thunderstorm.
$endgroup$
– mckenzm
Apr 2 at 4:19
|
show 2 more comments
2 Answers
2
active
oldest
votes
$begingroup$
Getting caught in a thunderstorm is the most likely cause. This can happen even to experts if they are incautious enough to take risks with the weather.
Here's an example with a paraglider. (I'll see what I can find for a hang-glider)
Ewa Wisnierska was sucked into a powerful thunderstorm while training
for the world paragliding championships in Australia. She was carried,
unconscious and wearing a layer of ice, to an altitude of more than
32,000 feet into the eye of the storm. https://youtu.be/IXLdsnB5VBw
Here's another - this is a good one because it is videoed with a live commentary from the pilot who escaped the updraft before it was too late.
Caught in Cloud Suck! - Life lesson from 3Km above sea level
https://youtu.be/FdoGtqCQ2ZY
Some science
Hang-gliders are likely to find it easier to escape a storm because their forward speed can be much greater that that of a paraglider. They should be able fly out of it provided they can keep a sense of direction.
Hang-glider Beginner wing 14 mph to 45 mph. Advanced wing - 16 mph, to over 100 mph which has been clocked in speed gliding competitions
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Paraglider Beginner wing 13mph to 22mph. Advanced wing - 14 mph to 35mph
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
EDIT (from the same source)
See under Wind penetration where my above suggestion is supported.
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Here is a claim that it can happen to hang-gliders as well but there is no reference to back it up.
In one reported incident, two hang gliders were caught in cloud suck
by the same storm clouds. Both gliders lost consciousness above 30,000
feet, one, happily, was released by the storm, and regained lucidity
before crashing into the ground. The other glider was not so
fortunate. His frozen body was discovered later and returned to his
family.
https://www.toysperiod.com/blog/extreme-sports/hang-gliders-in-the-sky/
Cloud suck
If you want to know how people get trapped and about emergency procedures for escape, then I suggest you Google "cloud suck".
Cloud suck is a phenomenon commonly known in paragliding, hang
gliding, and sailplane flying where pilots experience significant lift
due to a thermal under the base of cumulus clouds, especially towering
cumulus and cumulonimbus. The vertical extent of a cumulus cloud is a
good indicator of the strength of lift beneath it, and the potential
for cloud suck. Cloud suck most commonly occurs in low pressure
weather and in humid conditions.
https://en.wikipedia.org/wiki/Cloud_suck
Hypoxia due to Altitude
Helios Airways Flight 522 was a scheduled passenger flight from
Larnaca, Cyprus, to Athens, Greece, that crashed on 14 August 2005,
killing all 121 passengers and crew on board. A loss of cabin
pressurization incapacitated the crew ...
https://en.wikipedia.org/wiki/Helios_Airways_Flight_522
The Time of Useful Consciousness will vary depending on personal
physiological factors (e.g. if you're a smoker your blood doesn't
oxygenate as well - you will probably have less time. If you're a
mountain climber in excellent shape and used to breathing rarified air
on your climbs you'll probably have a little more time).
https://aviation.stackexchange.com/questions/2766/how-long-will-one-remain-conscious-in-the-event-of-a-sudden-cabin-depressurizati
answered Apr 1 at 20:21
chasly from UKchasly from UK
20k983174
$endgroup$
3
$begingroup$
Ok, I'd no idea it was that easy for even the experienced pilot, I need to improve my research methodology. Good answer. +1
$endgroup$
– Agrajag
Apr 1 at 20:24
$begingroup$
@Agrajag - I've done a bit of paragliding and hang-gliding!
$endgroup$
– chasly from UK
Apr 1 at 20:31
$begingroup$
@Agrajag - Does it have to be a hang-glider or could it be a paraglider? I've yet to find any evidence of the former being trapped in a storm cloud. Probably due to the difference in forward speed (see edit to my answer).
$endgroup$
– chasly from UK
Apr 1 at 20:44
$begingroup$
I wasn't going to be specific 'till I'd decided. I'm just going with hang glider beginner, but keeping an open mind regarding the actual tech. I'll take it all in and use the ideas, or something different that springs from them.
$endgroup$
– Agrajag
Apr 1 at 20:51
2
$begingroup$
This is definitive answer to the question. +1.
$endgroup$
– AlexP
Apr 1 at 21:12
|
show 4 more comments
$begingroup$
A hang glider caught under a powerful cumulo-nimbus is unlikely to be able to 'outfly' the updraft without breaking the airframe.
I have flown a high performance sailplane capable of around 180 knots, flying fast with the airbrakes out, wheel down and with crossed controls and STILL showing a healthy 5 metres per second climb. With all that one would expect to be sinking at probably 15 m/s. or more. 'Assuming the glide angle of a brick' as we say. A hang glider would simply be sucked in to the cloud and spat out at random. I flew ( sailplanes ) with a chap who, in the early days of gliding got inadvertently sucked in to a South African CuNim and emerged from the anvil at well over 30 000' ( the instruments all froze well below that ) the airframe was caked in ice and he had no supplemental oxygen. Very fortunate to survive. I have seen rates of over 20 m/s in a sailplane under big CuNims ( that's around 80 kilometers per hour straight UP! ) and rates WELL in excess of that have been recorded inside big developed storms. A H/G would go from entry at say 5000' to exit at 25000' in around 5 ( very terrifying ) minutes. The pilot would be lashed with hail, probably suffering from the cold and damp and possibly annoxia.
I very much doubt that a H/G could enter wave without being able to avoid it. In conditions where they were lifted to 25 000' in a very short space of time no one in their right mind would be out with a hang glider at all. ( I have piloted a sailplane to over 32000 in wave ) The windspeeds required would be well beyond the capabilities of the H/G to get airborne, penetrate any turbulence or penetrate enough to stay in the lift. Its implausible.
Inadvertent entry into cloud is the most likely scenario. ( although a lot of people who do this are no longer here to tell the tale as without instrumentation and experience, it is highly likely that the airframe breaks )
This was on a forecast relatively benign thermal day. cloud entry
answered Apr 2 at 2:53
nimbusgbnimbusgb
2012
$endgroup$
$begingroup$
The recommended strategy is to fly away from the cloud until you exit the area of lift, rather than just trying to dive down against the lift. (and better yet, to keep an eye on the weather and your rate-of-climb so that you'll know well in advance when trouble is brewing, and apply an ounce prevention instead of a pound of cure)
$endgroup$
– Jeremy Friesner
Apr 2 at 3:35
$begingroup$
That's as maybe but it doesn't answer the OP's question! :)
$endgroup$
– nimbusgb
Apr 2 at 9:51
$begingroup$
If the hang-glider air-frame seriously breaks, then the only option is to cut yourself out of the harness, fall out of the cloud and hope you emerge before you hit the ground. You then deploy your emergency chute. (Don't do it while you are still in the cumulo-nimbus or you will just go up again with no hope of steering your way out.)
$endgroup$
– chasly from UK
Apr 2 at 12:43
$begingroup$
@JeremyFriesner: easier said than done. In the absolute majority of cases the pilot would not be very well equipped to fly blind, and if you are climbing 40m/s you might have just a couple minutes of consciousness by the time it's obvious you should not be there. There are documented cases of this happening to experienced pilots.
$endgroup$
– Martin Argerami
Apr 2 at 13:33
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Getting caught in a thunderstorm is the most likely cause. This can happen even to experts if they are incautious enough to take risks with the weather.
Here's an example with a paraglider. (I'll see what I can find for a hang-glider)
Ewa Wisnierska was sucked into a powerful thunderstorm while training
for the world paragliding championships in Australia. She was carried,
unconscious and wearing a layer of ice, to an altitude of more than
32,000 feet into the eye of the storm. https://youtu.be/IXLdsnB5VBw
Here's another - this is a good one because it is videoed with a live commentary from the pilot who escaped the updraft before it was too late.
Caught in Cloud Suck! - Life lesson from 3Km above sea level
https://youtu.be/FdoGtqCQ2ZY
Some science
Hang-gliders are likely to find it easier to escape a storm because their forward speed can be much greater that that of a paraglider. They should be able fly out of it provided they can keep a sense of direction.
Hang-glider Beginner wing 14 mph to 45 mph. Advanced wing - 16 mph, to over 100 mph which has been clocked in speed gliding competitions
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Paraglider Beginner wing 13mph to 22mph. Advanced wing - 14 mph to 35mph
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
EDIT (from the same source)
See under Wind penetration where my above suggestion is supported.
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Here is a claim that it can happen to hang-gliders as well but there is no reference to back it up.
In one reported incident, two hang gliders were caught in cloud suck
by the same storm clouds. Both gliders lost consciousness above 30,000
feet, one, happily, was released by the storm, and regained lucidity
before crashing into the ground. The other glider was not so
fortunate. His frozen body was discovered later and returned to his
family.
https://www.toysperiod.com/blog/extreme-sports/hang-gliders-in-the-sky/
Cloud suck
If you want to know how people get trapped and about emergency procedures for escape, then I suggest you Google "cloud suck".
Cloud suck is a phenomenon commonly known in paragliding, hang
gliding, and sailplane flying where pilots experience significant lift
due to a thermal under the base of cumulus clouds, especially towering
cumulus and cumulonimbus. The vertical extent of a cumulus cloud is a
good indicator of the strength of lift beneath it, and the potential
for cloud suck. Cloud suck most commonly occurs in low pressure
weather and in humid conditions.
https://en.wikipedia.org/wiki/Cloud_suck
Hypoxia due to Altitude
Helios Airways Flight 522 was a scheduled passenger flight from
Larnaca, Cyprus, to Athens, Greece, that crashed on 14 August 2005,
killing all 121 passengers and crew on board. A loss of cabin
pressurization incapacitated the crew ...
https://en.wikipedia.org/wiki/Helios_Airways_Flight_522
The Time of Useful Consciousness will vary depending on personal
physiological factors (e.g. if you're a smoker your blood doesn't
oxygenate as well - you will probably have less time. If you're a
mountain climber in excellent shape and used to breathing rarified air
on your climbs you'll probably have a little more time).
https://aviation.stackexchange.com/questions/2766/how-long-will-one-remain-conscious-in-the-event-of-a-sudden-cabin-depressurizati
answered Apr 1 at 20:21
chasly from UKchasly from UK
20k983174
$endgroup$
3
$begingroup$
Ok, I'd no idea it was that easy for even the experienced pilot, I need to improve my research methodology. Good answer. +1
$endgroup$
– Agrajag
Apr 1 at 20:24
$begingroup$
@Agrajag - I've done a bit of paragliding and hang-gliding!
$endgroup$
– chasly from UK
Apr 1 at 20:31
$begingroup$
@Agrajag - Does it have to be a hang-glider or could it be a paraglider? I've yet to find any evidence of the former being trapped in a storm cloud. Probably due to the difference in forward speed (see edit to my answer).
$endgroup$
– chasly from UK
Apr 1 at 20:44
$begingroup$
I wasn't going to be specific 'till I'd decided. I'm just going with hang glider beginner, but keeping an open mind regarding the actual tech. I'll take it all in and use the ideas, or something different that springs from them.
$endgroup$
– Agrajag
Apr 1 at 20:51
2
$begingroup$
This is definitive answer to the question. +1.
$endgroup$
– AlexP
Apr 1 at 21:12
|
show 4 more comments
$begingroup$
Getting caught in a thunderstorm is the most likely cause. This can happen even to experts if they are incautious enough to take risks with the weather.
Here's an example with a paraglider. (I'll see what I can find for a hang-glider)
Ewa Wisnierska was sucked into a powerful thunderstorm while training
for the world paragliding championships in Australia. She was carried,
unconscious and wearing a layer of ice, to an altitude of more than
32,000 feet into the eye of the storm. https://youtu.be/IXLdsnB5VBw
Here's another - this is a good one because it is videoed with a live commentary from the pilot who escaped the updraft before it was too late.
Caught in Cloud Suck! - Life lesson from 3Km above sea level
https://youtu.be/FdoGtqCQ2ZY
Some science
Hang-gliders are likely to find it easier to escape a storm because their forward speed can be much greater that that of a paraglider. They should be able fly out of it provided they can keep a sense of direction.
Hang-glider Beginner wing 14 mph to 45 mph. Advanced wing - 16 mph, to over 100 mph which has been clocked in speed gliding competitions
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Paraglider Beginner wing 13mph to 22mph. Advanced wing - 14 mph to 35mph
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
EDIT (from the same source)
See under Wind penetration where my above suggestion is supported.
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Here is a claim that it can happen to hang-gliders as well but there is no reference to back it up.
In one reported incident, two hang gliders were caught in cloud suck
by the same storm clouds. Both gliders lost consciousness above 30,000
feet, one, happily, was released by the storm, and regained lucidity
before crashing into the ground. The other glider was not so
fortunate. His frozen body was discovered later and returned to his
family.
https://www.toysperiod.com/blog/extreme-sports/hang-gliders-in-the-sky/
Cloud suck
If you want to know how people get trapped and about emergency procedures for escape, then I suggest you Google "cloud suck".
Cloud suck is a phenomenon commonly known in paragliding, hang
gliding, and sailplane flying where pilots experience significant lift
due to a thermal under the base of cumulus clouds, especially towering
cumulus and cumulonimbus. The vertical extent of a cumulus cloud is a
good indicator of the strength of lift beneath it, and the potential
for cloud suck. Cloud suck most commonly occurs in low pressure
weather and in humid conditions.
https://en.wikipedia.org/wiki/Cloud_suck
Hypoxia due to Altitude
Helios Airways Flight 522 was a scheduled passenger flight from
Larnaca, Cyprus, to Athens, Greece, that crashed on 14 August 2005,
killing all 121 passengers and crew on board. A loss of cabin
pressurization incapacitated the crew ...
https://en.wikipedia.org/wiki/Helios_Airways_Flight_522
The Time of Useful Consciousness will vary depending on personal
physiological factors (e.g. if you're a smoker your blood doesn't
oxygenate as well - you will probably have less time. If you're a
mountain climber in excellent shape and used to breathing rarified air
on your climbs you'll probably have a little more time).
https://aviation.stackexchange.com/questions/2766/how-long-will-one-remain-conscious-in-the-event-of-a-sudden-cabin-depressurizati
answered Apr 1 at 20:21
chasly from UKchasly from UK
20k983174
$endgroup$
3
$begingroup$
Ok, I'd no idea it was that easy for even the experienced pilot, I need to improve my research methodology. Good answer. +1
$endgroup$
– Agrajag
Apr 1 at 20:24
$begingroup$
@Agrajag - I've done a bit of paragliding and hang-gliding!
$endgroup$
– chasly from UK
Apr 1 at 20:31
$begingroup$
@Agrajag - Does it have to be a hang-glider or could it be a paraglider? I've yet to find any evidence of the former being trapped in a storm cloud. Probably due to the difference in forward speed (see edit to my answer).
$endgroup$
– chasly from UK
Apr 1 at 20:44
$begingroup$
I wasn't going to be specific 'till I'd decided. I'm just going with hang glider beginner, but keeping an open mind regarding the actual tech. I'll take it all in and use the ideas, or something different that springs from them.
$endgroup$
– Agrajag
Apr 1 at 20:51
2
$begingroup$
This is definitive answer to the question. +1.
$endgroup$
– AlexP
Apr 1 at 21:12
|
show 4 more comments
$begingroup$
Getting caught in a thunderstorm is the most likely cause. This can happen even to experts if they are incautious enough to take risks with the weather.
Here's an example with a paraglider. (I'll see what I can find for a hang-glider)
Ewa Wisnierska was sucked into a powerful thunderstorm while training
for the world paragliding championships in Australia. She was carried,
unconscious and wearing a layer of ice, to an altitude of more than
32,000 feet into the eye of the storm. https://youtu.be/IXLdsnB5VBw
Here's another - this is a good one because it is videoed with a live commentary from the pilot who escaped the updraft before it was too late.
Caught in Cloud Suck! - Life lesson from 3Km above sea level
https://youtu.be/FdoGtqCQ2ZY
Some science
Hang-gliders are likely to find it easier to escape a storm because their forward speed can be much greater that that of a paraglider. They should be able fly out of it provided they can keep a sense of direction.
Hang-glider Beginner wing 14 mph to 45 mph. Advanced wing - 16 mph, to over 100 mph which has been clocked in speed gliding competitions
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Paraglider Beginner wing 13mph to 22mph. Advanced wing - 14 mph to 35mph
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
EDIT (from the same source)
See under Wind penetration where my above suggestion is supported.
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Here is a claim that it can happen to hang-gliders as well but there is no reference to back it up.
In one reported incident, two hang gliders were caught in cloud suck
by the same storm clouds. Both gliders lost consciousness above 30,000
feet, one, happily, was released by the storm, and regained lucidity
before crashing into the ground. The other glider was not so
fortunate. His frozen body was discovered later and returned to his
family.
https://www.toysperiod.com/blog/extreme-sports/hang-gliders-in-the-sky/
Cloud suck
If you want to know how people get trapped and about emergency procedures for escape, then I suggest you Google "cloud suck".
Cloud suck is a phenomenon commonly known in paragliding, hang
gliding, and sailplane flying where pilots experience significant lift
due to a thermal under the base of cumulus clouds, especially towering
cumulus and cumulonimbus. The vertical extent of a cumulus cloud is a
good indicator of the strength of lift beneath it, and the potential
for cloud suck. Cloud suck most commonly occurs in low pressure
weather and in humid conditions.
https://en.wikipedia.org/wiki/Cloud_suck
Hypoxia due to Altitude
Helios Airways Flight 522 was a scheduled passenger flight from
Larnaca, Cyprus, to Athens, Greece, that crashed on 14 August 2005,
killing all 121 passengers and crew on board. A loss of cabin
pressurization incapacitated the crew ...
https://en.wikipedia.org/wiki/Helios_Airways_Flight_522
The Time of Useful Consciousness will vary depending on personal
physiological factors (e.g. if you're a smoker your blood doesn't
oxygenate as well - you will probably have less time. If you're a
mountain climber in excellent shape and used to breathing rarified air
on your climbs you'll probably have a little more time).
https://aviation.stackexchange.com/questions/2766/how-long-will-one-remain-conscious-in-the-event-of-a-sudden-cabin-depressurizati
answered Apr 1 at 20:21
chasly from UKchasly from UK
20k983174
$endgroup$
Getting caught in a thunderstorm is the most likely cause. This can happen even to experts if they are incautious enough to take risks with the weather.
Here's an example with a paraglider. (I'll see what I can find for a hang-glider)
Ewa Wisnierska was sucked into a powerful thunderstorm while training
for the world paragliding championships in Australia. She was carried,
unconscious and wearing a layer of ice, to an altitude of more than
32,000 feet into the eye of the storm. https://youtu.be/IXLdsnB5VBw
Here's another - this is a good one because it is videoed with a live commentary from the pilot who escaped the updraft before it was too late.
Caught in Cloud Suck! - Life lesson from 3Km above sea level
https://youtu.be/FdoGtqCQ2ZY
Some science
Hang-gliders are likely to find it easier to escape a storm because their forward speed can be much greater that that of a paraglider. They should be able fly out of it provided they can keep a sense of direction.
Hang-glider Beginner wing 14 mph to 45 mph. Advanced wing - 16 mph, to over 100 mph which has been clocked in speed gliding competitions
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Paraglider Beginner wing 13mph to 22mph. Advanced wing - 14 mph to 35mph
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
EDIT (from the same source)
See under Wind penetration where my above suggestion is supported.
http://www.hanggliding.org/wiki/A_Comparison_of_Hang_Gliding_to_Paragliding
Here is a claim that it can happen to hang-gliders as well but there is no reference to back it up.
In one reported incident, two hang gliders were caught in cloud suck
by the same storm clouds. Both gliders lost consciousness above 30,000
feet, one, happily, was released by the storm, and regained lucidity
before crashing into the ground. The other glider was not so
fortunate. His frozen body was discovered later and returned to his
family.
https://www.toysperiod.com/blog/extreme-sports/hang-gliders-in-the-sky/
Cloud suck
If you want to know how people get trapped and about emergency procedures for escape, then I suggest you Google "cloud suck".
Cloud suck is a phenomenon commonly known in paragliding, hang
gliding, and sailplane flying where pilots experience significant lift
due to a thermal under the base of cumulus clouds, especially towering
cumulus and cumulonimbus. The vertical extent of a cumulus cloud is a
good indicator of the strength of lift beneath it, and the potential
for cloud suck. Cloud suck most commonly occurs in low pressure
weather and in humid conditions.
https://en.wikipedia.org/wiki/Cloud_suck
Hypoxia due to Altitude
Helios Airways Flight 522 was a scheduled passenger flight from
Larnaca, Cyprus, to Athens, Greece, that crashed on 14 August 2005,
killing all 121 passengers and crew on board. A loss of cabin
pressurization incapacitated the crew ...
https://en.wikipedia.org/wiki/Helios_Airways_Flight_522
The Time of Useful Consciousness will vary depending on personal
physiological factors (e.g. if you're a smoker your blood doesn't
oxygenate as well - you will probably have less time. If you're a
mountain climber in excellent shape and used to breathing rarified air
on your climbs you'll probably have a little more time).
https://aviation.stackexchange.com/questions/2766/how-long-will-one-remain-conscious-in-the-event-of-a-sudden-cabin-depressurizati
answered Apr 1 at 20:21
chasly from UKchasly from UK
20k983174
edited Apr 2 at 12:34
answered Apr 1 at 20:21
chasly from UKchasly from UK
20k983174
answered Apr 1 at 20:21
chasly from UKchasly from UK
20k983174
answered Apr 1 at 20:21
chasly from UKchasly from UK
20k983174
20k983174
3
$begingroup$
Ok, I'd no idea it was that easy for even the experienced pilot, I need to improve my research methodology. Good answer. +1
$endgroup$
– Agrajag
Apr 1 at 20:24
$begingroup$
@Agrajag - I've done a bit of paragliding and hang-gliding!
$endgroup$
– chasly from UK
Apr 1 at 20:31
$begingroup$
@Agrajag - Does it have to be a hang-glider or could it be a paraglider? I've yet to find any evidence of the former being trapped in a storm cloud. Probably due to the difference in forward speed (see edit to my answer).
$endgroup$
– chasly from UK
Apr 1 at 20:44
$begingroup$
I wasn't going to be specific 'till I'd decided. I'm just going with hang glider beginner, but keeping an open mind regarding the actual tech. I'll take it all in and use the ideas, or something different that springs from them.
$endgroup$
– Agrajag
Apr 1 at 20:51
2
$begingroup$
This is definitive answer to the question. +1.
$endgroup$
– AlexP
Apr 1 at 21:12
|
show 4 more comments
3
$begingroup$
Ok, I'd no idea it was that easy for even the experienced pilot, I need to improve my research methodology. Good answer. +1
$endgroup$
– Agrajag
Apr 1 at 20:24
$begingroup$
@Agrajag - I've done a bit of paragliding and hang-gliding!
$endgroup$
– chasly from UK
Apr 1 at 20:31
$begingroup$
@Agrajag - Does it have to be a hang-glider or could it be a paraglider? I've yet to find any evidence of the former being trapped in a storm cloud. Probably due to the difference in forward speed (see edit to my answer).
$endgroup$
– chasly from UK
Apr 1 at 20:44
$begingroup$
I wasn't going to be specific 'till I'd decided. I'm just going with hang glider beginner, but keeping an open mind regarding the actual tech. I'll take it all in and use the ideas, or something different that springs from them.
$endgroup$
– Agrajag
Apr 1 at 20:51
2
$begingroup$
This is definitive answer to the question. +1.
$endgroup$
– AlexP
Apr 1 at 21:12
3
3
$begingroup$
Ok, I'd no idea it was that easy for even the experienced pilot, I need to improve my research methodology. Good answer. +1
$endgroup$
– Agrajag
Apr 1 at 20:24
$begingroup$
Ok, I'd no idea it was that easy for even the experienced pilot, I need to improve my research methodology. Good answer. +1
$endgroup$
– Agrajag
Apr 1 at 20:24
$begingroup$
@Agrajag - I've done a bit of paragliding and hang-gliding!
$endgroup$
– chasly from UK
Apr 1 at 20:31
$begingroup$
@Agrajag - I've done a bit of paragliding and hang-gliding!
$endgroup$
– chasly from UK
Apr 1 at 20:31
$begingroup$
@Agrajag - Does it have to be a hang-glider or could it be a paraglider? I've yet to find any evidence of the former being trapped in a storm cloud. Probably due to the difference in forward speed (see edit to my answer).
$endgroup$
– chasly from UK
Apr 1 at 20:44
$begingroup$
@Agrajag - Does it have to be a hang-glider or could it be a paraglider? I've yet to find any evidence of the former being trapped in a storm cloud. Probably due to the difference in forward speed (see edit to my answer).
$endgroup$
– chasly from UK
Apr 1 at 20:44
$begingroup$
I wasn't going to be specific 'till I'd decided. I'm just going with hang glider beginner, but keeping an open mind regarding the actual tech. I'll take it all in and use the ideas, or something different that springs from them.
$endgroup$
– Agrajag
Apr 1 at 20:51
$begingroup$
I wasn't going to be specific 'till I'd decided. I'm just going with hang glider beginner, but keeping an open mind regarding the actual tech. I'll take it all in and use the ideas, or something different that springs from them.
$endgroup$
– Agrajag
Apr 1 at 20:51
2
2
$begingroup$
This is definitive answer to the question. +1.
$endgroup$
– AlexP
Apr 1 at 21:12
$begingroup$
This is definitive answer to the question. +1.
$endgroup$
– AlexP
Apr 1 at 21:12
|
show 4 more comments
$begingroup$
A hang glider caught under a powerful cumulo-nimbus is unlikely to be able to 'outfly' the updraft without breaking the airframe.
I have flown a high performance sailplane capable of around 180 knots, flying fast with the airbrakes out, wheel down and with crossed controls and STILL showing a healthy 5 metres per second climb. With all that one would expect to be sinking at probably 15 m/s. or more. 'Assuming the glide angle of a brick' as we say. A hang glider would simply be sucked in to the cloud and spat out at random. I flew ( sailplanes ) with a chap who, in the early days of gliding got inadvertently sucked in to a South African CuNim and emerged from the anvil at well over 30 000' ( the instruments all froze well below that ) the airframe was caked in ice and he had no supplemental oxygen. Very fortunate to survive. I have seen rates of over 20 m/s in a sailplane under big CuNims ( that's around 80 kilometers per hour straight UP! ) and rates WELL in excess of that have been recorded inside big developed storms. A H/G would go from entry at say 5000' to exit at 25000' in around 5 ( very terrifying ) minutes. The pilot would be lashed with hail, probably suffering from the cold and damp and possibly annoxia.
I very much doubt that a H/G could enter wave without being able to avoid it. In conditions where they were lifted to 25 000' in a very short space of time no one in their right mind would be out with a hang glider at all. ( I have piloted a sailplane to over 32000 in wave ) The windspeeds required would be well beyond the capabilities of the H/G to get airborne, penetrate any turbulence or penetrate enough to stay in the lift. Its implausible.
Inadvertent entry into cloud is the most likely scenario. ( although a lot of people who do this are no longer here to tell the tale as without instrumentation and experience, it is highly likely that the airframe breaks )
This was on a forecast relatively benign thermal day. cloud entry
answered Apr 2 at 2:53
nimbusgbnimbusgb
2012
$endgroup$
$begingroup$
The recommended strategy is to fly away from the cloud until you exit the area of lift, rather than just trying to dive down against the lift. (and better yet, to keep an eye on the weather and your rate-of-climb so that you'll know well in advance when trouble is brewing, and apply an ounce prevention instead of a pound of cure)
$endgroup$
– Jeremy Friesner
Apr 2 at 3:35
$begingroup$
That's as maybe but it doesn't answer the OP's question! :)
$endgroup$
– nimbusgb
Apr 2 at 9:51
$begingroup$
If the hang-glider air-frame seriously breaks, then the only option is to cut yourself out of the harness, fall out of the cloud and hope you emerge before you hit the ground. You then deploy your emergency chute. (Don't do it while you are still in the cumulo-nimbus or you will just go up again with no hope of steering your way out.)
$endgroup$
– chasly from UK
Apr 2 at 12:43
$begingroup$
@JeremyFriesner: easier said than done. In the absolute majority of cases the pilot would not be very well equipped to fly blind, and if you are climbing 40m/s you might have just a couple minutes of consciousness by the time it's obvious you should not be there. There are documented cases of this happening to experienced pilots.
$endgroup$
– Martin Argerami
Apr 2 at 13:33
add a comment |
$begingroup$
A hang glider caught under a powerful cumulo-nimbus is unlikely to be able to 'outfly' the updraft without breaking the airframe.
I have flown a high performance sailplane capable of around 180 knots, flying fast with the airbrakes out, wheel down and with crossed controls and STILL showing a healthy 5 metres per second climb. With all that one would expect to be sinking at probably 15 m/s. or more. 'Assuming the glide angle of a brick' as we say. A hang glider would simply be sucked in to the cloud and spat out at random. I flew ( sailplanes ) with a chap who, in the early days of gliding got inadvertently sucked in to a South African CuNim and emerged from the anvil at well over 30 000' ( the instruments all froze well below that ) the airframe was caked in ice and he had no supplemental oxygen. Very fortunate to survive. I have seen rates of over 20 m/s in a sailplane under big CuNims ( that's around 80 kilometers per hour straight UP! ) and rates WELL in excess of that have been recorded inside big developed storms. A H/G would go from entry at say 5000' to exit at 25000' in around 5 ( very terrifying ) minutes. The pilot would be lashed with hail, probably suffering from the cold and damp and possibly annoxia.
I very much doubt that a H/G could enter wave without being able to avoid it. In conditions where they were lifted to 25 000' in a very short space of time no one in their right mind would be out with a hang glider at all. ( I have piloted a sailplane to over 32000 in wave ) The windspeeds required would be well beyond the capabilities of the H/G to get airborne, penetrate any turbulence or penetrate enough to stay in the lift. Its implausible.
Inadvertent entry into cloud is the most likely scenario. ( although a lot of people who do this are no longer here to tell the tale as without instrumentation and experience, it is highly likely that the airframe breaks )
This was on a forecast relatively benign thermal day. cloud entry
answered Apr 2 at 2:53
nimbusgbnimbusgb
2012
$endgroup$
$begingroup$
The recommended strategy is to fly away from the cloud until you exit the area of lift, rather than just trying to dive down against the lift. (and better yet, to keep an eye on the weather and your rate-of-climb so that you'll know well in advance when trouble is brewing, and apply an ounce prevention instead of a pound of cure)
$endgroup$
– Jeremy Friesner
Apr 2 at 3:35
$begingroup$
That's as maybe but it doesn't answer the OP's question! :)
$endgroup$
– nimbusgb
Apr 2 at 9:51
$begingroup$
If the hang-glider air-frame seriously breaks, then the only option is to cut yourself out of the harness, fall out of the cloud and hope you emerge before you hit the ground. You then deploy your emergency chute. (Don't do it while you are still in the cumulo-nimbus or you will just go up again with no hope of steering your way out.)
$endgroup$
– chasly from UK
Apr 2 at 12:43
$begingroup$
@JeremyFriesner: easier said than done. In the absolute majority of cases the pilot would not be very well equipped to fly blind, and if you are climbing 40m/s you might have just a couple minutes of consciousness by the time it's obvious you should not be there. There are documented cases of this happening to experienced pilots.
$endgroup$
– Martin Argerami
Apr 2 at 13:33
add a comment |
$begingroup$
A hang glider caught under a powerful cumulo-nimbus is unlikely to be able to 'outfly' the updraft without breaking the airframe.
I have flown a high performance sailplane capable of around 180 knots, flying fast with the airbrakes out, wheel down and with crossed controls and STILL showing a healthy 5 metres per second climb. With all that one would expect to be sinking at probably 15 m/s. or more. 'Assuming the glide angle of a brick' as we say. A hang glider would simply be sucked in to the cloud and spat out at random. I flew ( sailplanes ) with a chap who, in the early days of gliding got inadvertently sucked in to a South African CuNim and emerged from the anvil at well over 30 000' ( the instruments all froze well below that ) the airframe was caked in ice and he had no supplemental oxygen. Very fortunate to survive. I have seen rates of over 20 m/s in a sailplane under big CuNims ( that's around 80 kilometers per hour straight UP! ) and rates WELL in excess of that have been recorded inside big developed storms. A H/G would go from entry at say 5000' to exit at 25000' in around 5 ( very terrifying ) minutes. The pilot would be lashed with hail, probably suffering from the cold and damp and possibly annoxia.
I very much doubt that a H/G could enter wave without being able to avoid it. In conditions where they were lifted to 25 000' in a very short space of time no one in their right mind would be out with a hang glider at all. ( I have piloted a sailplane to over 32000 in wave ) The windspeeds required would be well beyond the capabilities of the H/G to get airborne, penetrate any turbulence or penetrate enough to stay in the lift. Its implausible.
Inadvertent entry into cloud is the most likely scenario. ( although a lot of people who do this are no longer here to tell the tale as without instrumentation and experience, it is highly likely that the airframe breaks )
This was on a forecast relatively benign thermal day. cloud entry
answered Apr 2 at 2:53
nimbusgbnimbusgb
2012
$endgroup$
A hang glider caught under a powerful cumulo-nimbus is unlikely to be able to 'outfly' the updraft without breaking the airframe.
I have flown a high performance sailplane capable of around 180 knots, flying fast with the airbrakes out, wheel down and with crossed controls and STILL showing a healthy 5 metres per second climb. With all that one would expect to be sinking at probably 15 m/s. or more. 'Assuming the glide angle of a brick' as we say. A hang glider would simply be sucked in to the cloud and spat out at random. I flew ( sailplanes ) with a chap who, in the early days of gliding got inadvertently sucked in to a South African CuNim and emerged from the anvil at well over 30 000' ( the instruments all froze well below that ) the airframe was caked in ice and he had no supplemental oxygen. Very fortunate to survive. I have seen rates of over 20 m/s in a sailplane under big CuNims ( that's around 80 kilometers per hour straight UP! ) and rates WELL in excess of that have been recorded inside big developed storms. A H/G would go from entry at say 5000' to exit at 25000' in around 5 ( very terrifying ) minutes. The pilot would be lashed with hail, probably suffering from the cold and damp and possibly annoxia.
I very much doubt that a H/G could enter wave without being able to avoid it. In conditions where they were lifted to 25 000' in a very short space of time no one in their right mind would be out with a hang glider at all. ( I have piloted a sailplane to over 32000 in wave ) The windspeeds required would be well beyond the capabilities of the H/G to get airborne, penetrate any turbulence or penetrate enough to stay in the lift. Its implausible.
Inadvertent entry into cloud is the most likely scenario. ( although a lot of people who do this are no longer here to tell the tale as without instrumentation and experience, it is highly likely that the airframe breaks )
This was on a forecast relatively benign thermal day. cloud entry
answered Apr 2 at 2:53
nimbusgbnimbusgb
2012
answered Apr 2 at 2:53
nimbusgbnimbusgb
2012
answered Apr 2 at 2:53
nimbusgbnimbusgb
2012
answered Apr 2 at 2:53
nimbusgbnimbusgb
2012
2012
$begingroup$
The recommended strategy is to fly away from the cloud until you exit the area of lift, rather than just trying to dive down against the lift. (and better yet, to keep an eye on the weather and your rate-of-climb so that you'll know well in advance when trouble is brewing, and apply an ounce prevention instead of a pound of cure)
$endgroup$
– Jeremy Friesner
Apr 2 at 3:35
$begingroup$
That's as maybe but it doesn't answer the OP's question! :)
$endgroup$
– nimbusgb
Apr 2 at 9:51
$begingroup$
If the hang-glider air-frame seriously breaks, then the only option is to cut yourself out of the harness, fall out of the cloud and hope you emerge before you hit the ground. You then deploy your emergency chute. (Don't do it while you are still in the cumulo-nimbus or you will just go up again with no hope of steering your way out.)
$endgroup$
– chasly from UK
Apr 2 at 12:43
$begingroup$
@JeremyFriesner: easier said than done. In the absolute majority of cases the pilot would not be very well equipped to fly blind, and if you are climbing 40m/s you might have just a couple minutes of consciousness by the time it's obvious you should not be there. There are documented cases of this happening to experienced pilots.
$endgroup$
– Martin Argerami
Apr 2 at 13:33
add a comment |
$begingroup$
The recommended strategy is to fly away from the cloud until you exit the area of lift, rather than just trying to dive down against the lift. (and better yet, to keep an eye on the weather and your rate-of-climb so that you'll know well in advance when trouble is brewing, and apply an ounce prevention instead of a pound of cure)
$endgroup$
– Jeremy Friesner
Apr 2 at 3:35
$begingroup$
That's as maybe but it doesn't answer the OP's question! :)
$endgroup$
– nimbusgb
Apr 2 at 9:51
$begingroup$
If the hang-glider air-frame seriously breaks, then the only option is to cut yourself out of the harness, fall out of the cloud and hope you emerge before you hit the ground. You then deploy your emergency chute. (Don't do it while you are still in the cumulo-nimbus or you will just go up again with no hope of steering your way out.)
$endgroup$
– chasly from UK
Apr 2 at 12:43
$begingroup$
@JeremyFriesner: easier said than done. In the absolute majority of cases the pilot would not be very well equipped to fly blind, and if you are climbing 40m/s you might have just a couple minutes of consciousness by the time it's obvious you should not be there. There are documented cases of this happening to experienced pilots.
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– Martin Argerami
Apr 2 at 13:33
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The recommended strategy is to fly away from the cloud until you exit the area of lift, rather than just trying to dive down against the lift. (and better yet, to keep an eye on the weather and your rate-of-climb so that you'll know well in advance when trouble is brewing, and apply an ounce prevention instead of a pound of cure)
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– Jeremy Friesner
Apr 2 at 3:35
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The recommended strategy is to fly away from the cloud until you exit the area of lift, rather than just trying to dive down against the lift. (and better yet, to keep an eye on the weather and your rate-of-climb so that you'll know well in advance when trouble is brewing, and apply an ounce prevention instead of a pound of cure)
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– Jeremy Friesner
Apr 2 at 3:35
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That's as maybe but it doesn't answer the OP's question! :)
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– nimbusgb
Apr 2 at 9:51
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That's as maybe but it doesn't answer the OP's question! :)
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– nimbusgb
Apr 2 at 9:51
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If the hang-glider air-frame seriously breaks, then the only option is to cut yourself out of the harness, fall out of the cloud and hope you emerge before you hit the ground. You then deploy your emergency chute. (Don't do it while you are still in the cumulo-nimbus or you will just go up again with no hope of steering your way out.)
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– chasly from UK
Apr 2 at 12:43
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If the hang-glider air-frame seriously breaks, then the only option is to cut yourself out of the harness, fall out of the cloud and hope you emerge before you hit the ground. You then deploy your emergency chute. (Don't do it while you are still in the cumulo-nimbus or you will just go up again with no hope of steering your way out.)
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– chasly from UK
Apr 2 at 12:43
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@JeremyFriesner: easier said than done. In the absolute majority of cases the pilot would not be very well equipped to fly blind, and if you are climbing 40m/s you might have just a couple minutes of consciousness by the time it's obvious you should not be there. There are documented cases of this happening to experienced pilots.
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– Martin Argerami
Apr 2 at 13:33
$begingroup$
@JeremyFriesner: easier said than done. In the absolute majority of cases the pilot would not be very well equipped to fly blind, and if you are climbing 40m/s you might have just a couple minutes of consciousness by the time it's obvious you should not be there. There are documented cases of this happening to experienced pilots.
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– Martin Argerami
Apr 2 at 13:33
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2
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I'd swear I read an article several years ago about someone over Australia having something like this happen.
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– Michael Richardson
Apr 1 at 21:37
2
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Nevermind. Chasly's answer mentions this right away.
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– Michael Richardson
Apr 1 at 22:24
4
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Gliding altitude records are not set using thermals, but by "wave riding" the airflow over mountain ranges. Just like an airfoil, the profile of a line of hills affects the air flow up to 10 times the height of the hills themselves. In the right weather conditions these flows can remain stable for several days, and nights (unlike thermals which only exist during the day). Even in the UK with hills of only a few thousand feet, altitudes of 20,000ft are not difficult to achieve - except for the problem of keeping out of commercial controlled airspace.
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– alephzero
Apr 1 at 23:54
1
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pedantry: thermals can exist at night, if there is a heat source on the ground. (a wildfire or lava flow would do nicely :))
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– Jeremy Friesner
Apr 2 at 3:16
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@Michael Richardson Possibly a canopy (trike or parachute) during a thunderstorm.
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– mckenzm
Apr 2 at 4:19