Pork Pie,
Bob Stroud told me an interesting story.
He was working with the Vesco's as they approached 400 mph. Don was
beginning
to experience stability problems with the chute out until he slowed
about 50 mph.
Bob added 20 feet to the tow line because we all know - the longer the
line, the
better the stability.
Dead wrong. Don had a very bad ride. Video showed the chute wildly
swinging around.
Bob eliminated the 20 foot extension and cut another 10 feet off.
Don found a very small amount of play in the steering which he eliminated.
Result: Chute was stable and so was the car.
Bob's conclusion was that he had put the chute back into the wake
turbulence.
Bryan
Pork Pie wrote:
>very often, the problem from the instability with the chute comes from the
>rear end of the car - in other words, the turbulences the rearend produce and
>which "crashed" into the chute. Best example for a bad rearend - Craig Taylors
>big electric car from the Ohio University, who runs last year a new electric
>record. Tom Burkland and myself, we both told Craig that above
>250 mph, the chute will move the cars rearend around due the bed rear end
>erodynamic - the long rope will elimante the problem slightly but not really.
>When he runs his 270 out of the 5 and he pulled the chute, the rear moves left
>and right.
>A long rope can help to reduce the instability, but at first check the
>rearend, what kind of turbulences it can produce. By a streamliner some Vortex
>can help to reduce the problem.
>Nish use them on the 998 and Nebelous II and III got them on the rearend.
>
>See ya
>
>Pork Pie
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