John;
How large is your wing? Just curious.
Regards, Neil Tucson, AZ
--------------------------------------------------
From: "John Burk" <joyseydevil@comcast.net>
Sent: Saturday, July 24, 2010 2:32 PM
To: "LandSpeed List" <Land-speed@autox.team.net>
Subject: Re: [Land-speed] Bloodhound
> Mayf
> Found the ac by hanging a wooden model from various points and blew air at
> it . As far as I know aerodynamic center and center of pressure are
> synonymous . The wing drag adds to stability and reduces acceleration a
> lot
> less . Equivalent tail ballast would have eliminated directional stability
> .
> Unless lift is a problem ballast hurts by reducing acceleration while the
> car is power limited . For high hp cars that are always traction limited
> ballast helps by reduces aero drag as a % of thrust leaving more for
> acceleration . LSR is drag racing , acceleration = speed . Front slip , I
> think is like under steer in a corner , front lateral slip ends as soon as
> the throttle closes , rear later slip doesn't . The nose touches when it
> tips 5 deg and I'm not worried about it digging in but staying down could
> have been a problem without the wings were added . Old Joe Devine finally
> gave up on the 6 ft long nose panels and Joe Timney finished them . I
> agree
> , I like aluminum . I over-optimistically entered this year but it'll be
> finish for next year . Thanks for the questions .
> John
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