How difficult, Jeb Corliss wing suit stunt?

On 2/9/2012 10:24 PM, John Doe wrote:
I am not a pilot, but familiar with flight simulation. I know that
gliding limits your ability to control altitude. This is extremely
risky?

http://www.youtube.com/watch?v=rFQc7...feature=colike

Mainly curious about how difficult that was.
Thanks.

I happen to be that rare bird, a commercial glider pilot.

The technical answer to your question: You are fairly safe as long as
the terrain is dropping away faster than your "glider" sinks toward the
ground. This dude's "glider" has a terrible Lift/Drag ratio, but the
terrain is dropping rapidly. He likely had pre-surveyed those spots
where he came close to the ground to ensure that he would have
sufficient energy for terrain clearance. Of course L/D (glide ratio)
isn't everything! For example, you have wind to consider. Again, his
"glider" is pretty well suited to the task because his high wind loading
will make him less at the mercy of the wind. Finally, his tiny wingspan
make it safer for him the "thread the needle" down in the rocks.

Now my gut answer: That dude's crazy. I think way too much of my soft
body to ever consider trying something like that.

Vaughn

Vaughn vaughnsimon gmail.com wrote:

John Doe wrote:

I am not a pilot, but familiar with flight simulation. I know that
gliding limits your ability to control altitude. This is extremely
risky?

http://www.youtube.com/watch?feature...VRJowk#t=81 s

Mainly curious about how difficult that was.

I happen to be that rare bird, a commercial glider pilot.

The technical answer to your question: You are fairly safe as
long as the terrain is dropping away faster than your "glider"
sinks toward the ground. This dude's "glider" has a terrible
Lift/Drag ratio, but the terrain is dropping rapidly. He likely
had pre-surveyed those spots where he came close to the ground
to ensure that he would have sufficient energy for terrain
clearance. Of course L/D (glide ratio) isn't everything! For
example, you have wind to consider. Again, his "glider" is
pretty well suited to the task because his high wind loading
will make him less at the mercy of the wind. Finally, his tiny
wingspan make it safer for him the "thread the needle" down in
the rocks.

Now my gut answer: That dude's crazy. I think way too much of
my soft body to ever consider trying something like that.

Thanks.

I'm impressed that they can steer in a wingsuit.

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Vaughn