Tom, thanks for the reply. Glad to hear that the analyses is pretty much on
track with regards to yank load. It is what I was trying to get everyone to
think about. I understand that there are speed secrets that everyone wants
to keep close to their chests, but there is no award for stopping fast or
correctly. We should ,as a community, be sharing all knowledge with respect
to stopping after the race is done. As to the assumptions of failure, are
you chiding me as to the cause? Hope not because, I very clearly make it
plain that I have not a clue as to what exactly happened. And just because
something works one time then fails another is more reason to look at the
high speed parachute situation...and I suspect that not much goes over you
head...
not picking on you Tom, just a good place for more soap box.
mayf, the red necked ignorant desert rat in Pahrump
----- Original Message -----
From: "Thomas E. Bryant" <saltracer@awwwsome.com>
To: "DrMayf" <drmayf@teknett.com>
Cc: <land-speed@autox.team.net>
Sent: Tuesday, October 22, 2002 8:25 AM
Subject: Re: Parachute Deployment Load Rates...
> Mayf,
> I scanned your essay and appreciate people like you that have the
> knowledge in the engineering arena. Most of what you had to say probably
> went right over my head, but I am amazed at the force applied in an
> opening parachute.
>
>
> First, I want to say that no one should be making assumptions as to why
> the failure occurred. This should only be done by those that are
> qualified and are able to inspect the remains of the chutes. I know that
> the Whites are very safety conscious and am convinced that all was done
> with safety in mind. Obviously the chutes did work on the down run.
>
> I was talking with Jeff Shipley about chutes and he made an interesting
> observation. He said that with the long tow lines used by liners, the
> chute is fully deploy, before the tow line slack is removed, which
> causes a tremendous yank load when tightened. It occurred to me that
> there should be some thought given to a shock absorber unit or tow lines
> with stretchable quality which would lighten the initial shock of
> deployment. I will leave the design of such up to you engineering types.
>
> BTW, a great web page.
>
> Tom, Redding CA - #216 D/GCC
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/land-speed
/// what is needed. It isn't that difficult, folks.
|