Flatturn stall video

[unkulunkulu 0]

Recently I came across this particular sketchy video:
http://www.youtube.com/watch?v=v4sqg0UbUmE

It has an interesting preface: don't mix strong winds and a flat turn (wut?)
My question is: what caused this stall? What we have to do to avoid this (I feel not flat turns)?

[Tetrahedron 13]

That wasn't a flat turn. Looks like he passed through a small dust devil.

[popsjumper 2]

Tetrahedron

That wasn't a flat turn. Looks like he passed through a small dust devil.

WRTO the video's canopy: I agree. It wasn't a stall either..twas a partial collapse.

"Flat turn + high winds = Don't do that" is not good advice.

My reality and yours are quite different.
I think we're all Bozos on this bus.
Falcon5232, SCS8170, SCSA353, POPS9398, DS239

[AdD 1]

Quote

st: Tetrahedron wrote:.That wasn't a flat turn. Looks like he passed through a small dust devil.

WRTO the video's canopy: I agree. It wasn't a stall either..twas a partial collapse.

"Flat turn + high winds = Don't do that" is not good advice.

Collapse is result of a stall, which MAY be a result of flying in brakes. My personal policy is to avoid braked flight in conditions where turbulence is likely.

Life is ez
On the dz
Every jumper's dream
3 rigs and an airstream

[billvon 2,400]

>Collapse is result of a stall

A collapse is a loss of tension on the lines; a stall is separation of the relative wind from the canopy surface. A canopy can be flying (not stalled) and still see a canopy collapse in strong winds. Likewise, you can stall a canopy and be at minimal risk of a canopy collapse.

[unkulunkulu 0]

So this is just me, I thought there was a bit too much of input on the left side at around 0:17 in the video? Or this shouldn't be too dangerous in normal conditions? I haven't flown that small of a canopy, but when I was stalling my Omega 189 I saw something similar.

[AdD 1]

Quote

>Collapse is result of a stall

A collapse is a loss of tension on the lines; a stall is separation of the relative wind from the canopy surface. A canopy can be flying (not stalled) and still see a canopy collapse in strong winds. Likewise, you can stall a canopy and be at minimal risk of a canopy collapse.

In this video the guy is in deep brakes, increasing the angle of attack, the turbulence seems to contribute at that point and the canopy stalls/collapses. That's my take on the video.

Life is ez
On the dz
Every jumper's dream
3 rigs and an airstream

[popsjumper 2]

AdD

My personal policy is to avoid braked flight in conditions where turbulence is likely.

Not a bad idea at all.
I believe that's what Germaine recommends.

My reality and yours are quite different.
I think we're all Bozos on this bus.
Falcon5232, SCS8170, SCSA353, POPS9398, DS239

[dorbie 0]

unkulunkulu

Recently I came across this particular sketchy video:
http://www.youtube.com/watch?v=v4sqg0UbUmE

It has an interesting preface: don't mix strong winds and a flat turn (wut?)
My question is: what caused this stall? What we have to do to avoid this (I feel not flat turns)?

Wind shear causes it. i.e. flying through a change in wind speed; a region of air at one speed and direction into a region of air at another speed and direction. High wind does not affect airspeed and therefore does not affect flight performance as long as it is laminar (it will only affect ground speed), it is the turbulence that will cause an event like this due to the invisible variations in wind speed & direction you might encounter in flight causing sudden variations in air speed and angle of attack. Flying a small slow flying canopy you are particularly vulnerable to wind shear.