Quote:
Originally Posted by Bennett_Racing
That makes alot of sense, thanks for that.
Also we researched this body shape, (its a 2003 Pontiac Firebird)
And the photos we found, they actually dont use spill plates....
Is this because the body is effient enough?
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The body looks like a continuous wedge growing wider and wider to the rear.
The way the nose divides the airstream,the flow down the top and side,their respective velocities may be closely matched.If that is true then you'll have a nice clean separation to the turbulent wake without counter-rotating attached vortices at each side.So maybe on account of that they skip the spill plates, figuring the pilot chutes will find good air for which to yank the parachutes out of the packs and not just get slammed into the track.
I think we'll all suspect you've got some separation just behind the backlight but it sounds like the rulebook says you can't touch that area,and there's plenty of room for re-attachment,so with the exception of the small burble,the boot will be clean.
It would be nice if the body manufacturerer could provide you with a center of pressure location to compare to the center of gravity.You might want to run the spill plates just to have some weather-vane back there.If you somehow lost traction under power and one wrinkle-wall was centrifugally larger than the other,the rear end could try and steer into the smaller tire ( I don't know how effective the little drag tires are at the front for steering )and if you were getting crosswise,the weathervane might help coax the tail back,keeping you out of the guardrail.