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Re: Ackerman stuff again

To: tigers@Autox.Team.Net
Subject: Re: Ackerman stuff again
From: marrone@wco.com (Frank Marrone)
Date: Thu, 6 Feb 1997 20:40:20 -0800 (PST)
A Lotus officianado I know claims this was done on purpose (wrong ackerman
angle) because Collin whats-his-name figured it would actually help
handeling on specific Lotus cars.  (Was it a Lotus 7 that this was done on?)

Is this true and can anyone explain his reasoning?

In my experience, carefuly applied induced oversteer can indeed overcome a
myriad of built in handeling woes.  It is amazing what you can do with a
full size american sedan on a twisty road assuming you know the car and the
road well.  I've surprised many sports car owners on Crow Canyon Road in
the bay area.  Of cours I never knew for sure if I was actually outdriving
them or if the sight of 4500lbs of '63 Mercury getting sideways in the turns
distracted them and gave me an advantage.


>At 05:28 pm 2/6/97 +0100, you wrote:
>>Jim,
>>
>>A very succinct explanation of the Ackerman issue.  I was discussing
>>this with an associate and he replied "Hell, my Lotus had the wrong
>>Ackerman geometry.  Never bothered me, just wait till the front starts
>>acting up and steer with the gas pedal".  
>>Jay's Dad

>Steve,
> The biggest daily problem is turning very sharp into a parking space
> at slow speed and having the tires scrub on the pavement.  At high
>to moderate speed it slows you down in a fairly sharp corner very
>quickly.  I tried steering with the gas at a few autocross meets.
>There is a fixed amount of traction available,  which if you apply
>too much vector force ahead,  (hit the power) plus  the vector force
> that is turning you, you exceed the traction of the rear tires and 
> suddenly have major oversteer and spin out backwards.  I did it
> a few times. A sway bar on the rear made it much worse.
> So I took that off after one day of trying it.
>      Jim Barrett Tiger II and others.
>
>
>
Frank Marrone          MK I Tiger B9471116
marrone@wco.com        1966 LTD 
                       Series I Alpine  (2.3L powered by Ford)
                       Yamaha Seca 900


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