I almost agree with your last statement John.
From what I've seen, it's:
1) Incorrect packing.
2) Bad packing
3) Sloppy packing.
4) Dirty chute (glued together by salt)
5) Incorrect mounting.
6) Incorrect size.
I saw one poorly packed chute that got a line over and cut open a panel.
Not fun.
After that we had our crew member Ed Conway pack the chute. Ed drove F-105
Thuds over RP-6 in Viet Nam. For some reason had a very close, respectful
relationship with Parachutes. Might have been because he had to punch
out twice.
As far as opening loads, I wonder how much energy was generated by Al
Teague's
high speed chute. When it opened at 430+ it made a boom that I could
feel in my
chest. I was standing on the return road at 5 when the chute opened at
about 5 <
You bring up some very interesting information John. The next time BS
talks to BS
I'll bring it up. It should be interesting.
Thanks for the information John,
Bryan Savage
john robinson wrote:
> During the test time for the ParaMonitor, (cool name huh?) one of the
> chute manufacturers maintained there was a "spike" of load that
> destroyed chutes. the engineer and I that developed my system
> discussed this for a long time, and came to the conclusion that the
> nylon system could not support such a spike, by this we mean that the
> chute system could not react that quickly, porosity of material, the
> ability of the material to stretch, (there were several technical
> engineering terms he used, that I have forgotten, not being an
> engineer) describing the interplay of forces, materials, construction,
> time and loads, that brought him to the conclusion that the system
> could not spike in the manner described by the chute manuf. I think
> the LSR chutes fail due to incorrect size, and incorrect mounting.
>
>
> John Robinson, Mechanician
> Mechanical Engineering University of Wisconsin
> 1513 University Ave.
> Madison, Wi. 53706
> 608-262-3606
> Current World Land Speed Record Holder
> Bonneville Salt Flats
> H/GCC 92 cu.in. 1980 Dodge Colt
> 144.396 MPH set 2000
> MPS-PG 441 c.c. 1967 BSA Victor Motorcycle
> 95.193 MPH set 2001
> Antarctic Ice Driller Oct02-Jan03
|