I think this might have been too long to get through the first time so I
edited most of Keith's original e-mail this time. Let's see if it works now.
Regards, Neil Tucson, AZ
-----Original Message-----
From: Albaugh, Neil
Sent: Wednesday, December 17, 2003 1:34 PM
To: 'Keith Turk'; land-speed@autox.team.net
Subject: RE: aero loading Pt 2
Keith;
" During a shift for example... under power the rear was heavy.. then when
you release
the clutch the nose became heavy... and as you selected the next gear and
were
once again under power the weight transfered back to the rear... this
happened
with each shift..."
When the rear wheels were developing high torque, it tended to raise the
nose. This caused either some lift or it decreased the downforce on the
nose-- (both would feel similar)-- and when you pushed in the clutch, the
rear axle was no longer trying to lift the nose, allowing the body to assume
a "nose down" attitude and that created downforce at the front. That would
feel like the weight had shifted forward.
This is my take on why it felt that way. If you revise the rear suspension
geometry, you could minimize the lifting effect of rear wheel torque. I
can't explain how to do that without creating an e-mail so long it would
never get posted but I'm sure Dave can show you how it's done,
Regards, Neil Tucson, AZ
-----Original Message-----
From: owner-land-speed@autox.team.net
[mailto:owner-land-speed@autox.team.net] On Behalf Of Keith Turk
Sent: Wednesday, December 17, 2003 1:26 AM
To: land-speed@autox.team.net
Subject: aero loading Pt 2
with a suspended car there is weight at all times on all four wheels when
the
car is static. That weight changes as the car accelerates down the course.
The first way I noticed the changes was with my air ride in the Camaro...
the
air pressures increased and decreased as weight transfered around....
During
a shift for example... under power the rear was heavy.. then when you
release
the clutch the nose became heavy... and as you selected the next gear and
were
once again under power the weight transfered back to the rear... this
happened
with each shift...( I know it's stating the obvious.. but we are talking
about
changes in balance and that's what I want to understand )
............................................................................
.
Keith ( my head hurts... but this is exactly what Seth Hammond and I talked
about... he'd thought about it but never did it... )
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