[bisleybob]

ok so after the recent cloud suck deployment video i got thinking.

is it possible to build a parachute with veriabe sink rate? we are always told to buy a chute size based on our all up weight and the type of air we fly in to give a sink rate of 5mps equivalent of jumpping off a 6 foot wall in terms of impact. and absolutly no more than 7mps equivalent of jumping from a 15 ft wall.

after the deployment video we have recognized the need for rapid decent.

here is the hypothesis for all the greatest org minds.

can a chute be made with maybee a pull chord flap system to regulate airflow and therfore decent rate like hot air baloons do sort of.
this was if in cloud open it up and shift your ass downward then when clear of cloud slow your ass up a tad.

answers below

[bisleybob]

my idea is this

fly with two reserves one small and one the right size.

use the normal one in all situations. but if in a cloud throw the little one then the big one once clear.

[Fawkes]

or something like on a paraglider to redurce surface: "making ears" by pulling the outer A-lines and make the screen deform temporarely ...

[peanuts]

line going up middle to center of chute. pull line, chute smaller volume.

idea #2. lock on swivel. as chute wraps up, descent increases. clear of clouds, release swivel (if it ain't too late) before chute looks like a cigar.

[deeprecon1]

[bisleybob]

[gasdive]

Throwing the small one if you end up in a freefall would reduce the opening shock.

=:)

[airdynamic]

Call me cynical but.....Is it not better to spend our time thinking of how not to get in to situations to have to throw a reserve.
After all there is so many people out there flying with very few needing to come down under a reserve.
We all know the dangers of looping gliders, some choose to do it knowing full well they may need to throw a reserve. Others like me prefer to not loop and not need to count on a reserve.

In my opinion...I fly as if I don't own a reserve.

Air

[dave hopkins]

[NMERider]

[Dan Harding]

I've seen the small drogue chutes at some landing zones, and they seem to do the job. Having one for the possibility of cloud suck might be a good idea.

[CHassan]

If you are worried about all that, rig a skydive chute and get the training. Then when the time comes, cut away, freefall, deploy and steer yourself back home.

[bisleybob]

[bisleybob]

[bisleybob]

my original idea of a small chute may not work.

i saw a guy deploy once with a small chute, quite a fast sink rate (he was obsessd with quick opening so got a smaller one but thats another discussion) anyway because he sank fast his wing kept trying to fly. a strange dance ensued with the wing picking up then stall and the chute taking over.

it did not look good with the chute at strange angles and scary like at any point it may give up.

you are going to need to go down pretty quick. a friend recently hit the top of a climb the lift strengthened 9 up he new this was now cloud suck he dove bar fully in to his waist. at full dive he was still going up he worked out taking off his dive speed and adding it to the amout he was still going up he was in 12 up.

a full five minutes he stayed like that intill it dropped off. he never even entered whispy bits.

i guess we need to know what is the max you can sink before the wing tries to fly (i know there are some aerodynamic minds on here that can answer that) then what would we need to escape a cloud then in theory we can asses weather anything can be made.

[airdynamic]

[bisleybob]