Dave,
Why don't you just build one and test it? I personally think that proper
"stretch" and ultimate strength of the riser(s) along with proper canopy
design/size and the correct application of those two items regarding speed
will do the job. It has in the past for aircraft, space shuttles....even
airliners. But hey, there certainly could to be something better (like your
idea?) out there. If Bob is wrong and it isn't too big and heavy, I could
see if it would fit in my car.
Skip
At 06:52 AM 10/27/02 -0500, Dave Dahlgren wrote:
>This is something that i talked to Bob Stroud about this summer in detail. His
>answer is that it would not work. I was told it was too big too heavy and
>really
>did not describe the problem. He did seem very sincere and we talked about it
>for about a half hour or so. I had only asked that if i made a prototype
and it
>wa tested and proved successful that i ended up on the patent if it was
>patenable and got some financial consideration in the sales of them which i
>suspect would be very limited. To me this was on of the most simple and
elegant
>answers to the problem. It is the same way you can catch a 1000 fish on 100 lb
>line... A big reel with a drag on it to absorb the energy and keep the forces
>manageable. At this point i am ready to do two things with the idea. Either
>work
>with another company which is preferred for insurance and liability issues or
>second put it in the public domain which is in my mind the more noble and
>honorable thing to do if it helps people in the LSR world.... My real question
>as well is how do/did they stop the jet and rocket cars that are heavier and
>faster??
>
>Dave
>"Albaugh, Neil" wrote:
>>
>> Mayf;
>>
>
>>
>> Parachute tether line seems to have similar requirements to climbing rope--
>> it needs to stretch and absorb energy. The longer the tether, the more the
>> stretch and the lower the "G" forces and tensile loads. It may also be
>> possible to pay out the line dynamically to absorb lots more energy--
>> perhaps unwinding the tether line from something like a drum that has a
>> brake. The additional drag of the brake as the tether line pulled off the
>> drum might be one approach to reducing the "Yank" force on a parachute that
>> is deployed at high speed.
>>
>
>> Regards, Neil Tucson, AZ
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