Parachute cans

Started by tallguy, June 04, 2026, 07:01:34 PM

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tallguy

June 04, 2026, 07:01:34 PM Last Edit: June 04, 2026, 07:03:53 PM by tallguy
Most of those I've seen are open at the back, and therefore don't encourage the air that goes around them to smoothly "close".  I have seen one vehicle that keeps these cans enclosed during the timed part of a run, prior to deployment of the chute(s).  If I remember correctly, it was a motorcycle streamliner . . . (I think it may have been either the BUB streamliner or Ack Attack.)

I'm wondering how problematic it would be to have tapered, aerodynamically-shaped "caps/covers/plugs" to provide for smooth closing of the air.  Yes, these items would need, after deployment, to stay isolated from the chute(s), in order to not damage the chute(s).  I can imagine the caps/covers/plugs preceding the chute(s) in similar fashion to what a pilot chute does.

Dynoroom

#1
June 05, 2026, 10:01:57 AM
It was likely the Ack Attack motorcycle streamliner you are thinking of, although Tom Burkland's & Vesco's Turbineator streamliner has closed doors around the paracuhtes also. Mike removed the doors on the motorcycle streamliner when they were found to create rider instability. Rockey (the rider) was having trouble controling the vehicle after the doors were installed. He oppened the doors a small amount & the instability went away.
Aerodynamics is not always what we think it should be...  muutt
Michael LeFevers
Kugel and LeFevers Pontiac Firebird

Without Data You're Just Another Guy With An Opinion!

Racing is just a series of "Problem Solving" events that allow you to spend money & make noise...

floydjer

#2
June 05, 2026, 12:54:50 PM
Did not the Summers Bros' Goldenrod have an enclosure over the 'chute tubes that was launched prior to deployement??
I`d never advocate drugs,alcohol,violence or insanity to anyone...But they work for me.

stay`tee

#3
June 05, 2026, 02:48:01 PM
Quote from: Dynoroom on June 05, 2026, 10:01:57 AMIt was likely the Ack Attack motorcycle streamliner you are thinking of, although Tom Burkland's & Vesco's Turbineator streamliner has closed doors around the paracuhtes also. Mike removed the doors on the motorcycle streamliner when they were found to create rider instability. Rockey (the rider) was having trouble controling the vehicle after the doors were installed. He oppened the doors a small amount & the instability went away.
Aerodynamics is not always what we think it should be...  muutt
Resistance can also be your friend  :-D
First Australian to ride a motorcycle over 200mph at Bonneville,,,

kiwi belly tank

#4
June 05, 2026, 05:22:26 PM
My chute tubes are part of the aero package to help close the air behind the car. The tow lines don't go through the tubes, they are attached to the chassis right behind the diff inside the tunnel to eliminate chassis leverage arm length. I don't take pics of my junk since I know what it looks like :roll:  but you can see them in this video, there's 6 of them.
https://www.youtube.com/watch?v=jQjy1nFuOZk
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