tandem @ 1000# exit weight & 190mph !!!

[cobaltdan 0]

A military Vector system was used with an 8' tether connected to our cargo. Cargo was a 55 gallon drum filled with lead and gravel. Rollers were bolted to the tail of our casa and our cargo loaded with a forklift. All test jumps were live and instrumented with dataloggers and video.

At 821 pounds exit weight with a 6' drogue free fall speed was just under 160mph. Max force from deployment was 6.4 g, deployment took 5.2 seconds. Canopy was landed with weight for a stand up landing!!!!

A new type drogue was also tested. it had a problem in that it did not collapse. This created huge shock to the canopy at line stretch. Interesting to note that the canopy was undamaged from a peak force on one jump of over 24,560 pounds !

this was not a military reinforced canopy but a stock Atair 350 sport tandem. We continued jumping the canopy until some damage was caused and that was not until we exceeded 36,000 pounds peak force !!!


Video will be posted soon @

http://www.extremefly.com/aerodynamics/canopies/tandem.html

sincerely,

dan<><>
atair aerodynamics

Daniel Preston <><>
atairaerodynamics.com (sport)
atairaerospace.com (military)

[cobaltdan 0]

picture attached

Daniel Preston <><>
atairaerodynamics.com (sport)
atairaerospace.com (military)

[cobaltdan 0]

Daniel Preston <><>
atairaerodynamics.com (sport)
atairaerospace.com (military)

[cobaltdan 0]

another picture

Daniel Preston <><>
atairaerodynamics.com (sport)
atairaerospace.com (military)

[weid14 0]

wow, how much did you pay that guy to do THAT!?

[hobbes4star 0]

did you guys have a cut away system for the drum??

if fun were easy it wouldn't be worth having, right?

[PhreeZone 20]

Also who was the one that was slightly off there rocker? I'd have to give him a round of applause if I watching for landing it with the weight....

Also what Casa did you did this out of?

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[SkydiveMonkey 0]

Gives a whole new meaning to Accelerated FreeFall !! What sort of damge was done to the canopy when it did start to fail? Did the jumper have any problems when turning due to the weith being a lot lower (ie pendulem effect)?

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[Viking 0]

wow very impressive

I swear you must have footprints on the back of your helmet - chicagoskydiver
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[fudd 0]

Scary, if that wire had snapped it could give the jumper a serious slap in the face, they probably know what they are doing, but it still looks pretty damn dangerous...

There are only 10 types of people in the world. Those who understand binary, and those who don't.

[cobaltdan 0]

yes, of course there is a cutaway for the drum. the drum also has its own parachute and aad and can also be static lined off the jumper.

in military use the cargo is only cutaway as a last resort. they keep the weight even if going for their reserve.

btw. the cargo is suspended by an 8' length of webing not a cable.

when you deploy your body backslides slightly and if you are not perfectly over the barrel it will orbit and induce line twists. picture piloting a cobalt 350 with a 1000# passenger and 4 twists...flys straight but how do you kick out? ........you cant you have to put your feet on the tether and 'walk' around it undoing the twists !!!

damage: when we finaly went too far and induced damage it was basically at several bartacks on the line attachment points.

sincerely,

dan<><>

Daniel Preston <><>
atairaerodynamics.com (sport)
atairaerospace.com (military)