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Re: [Land-speed] Polar Moment

To: "Elon" <saltfever@comcast.net>, <neil@dbelltech.com>, "'land-speed
Subject: Re: [Land-speed] Polar Moment
From: NT788@comcast.net
Date: Wed, 16 Jan 2008 04:07:39 +0000
I agree with Neil! Jack

-------------- Original message -------------- 
From: "Elon" <saltfever@comcast.net> 

> Hi Neil. Good point, I understand the effect on controllability. I can see, 
> on a short wheel base, car how you would want to slow down the twitchiness! 
> However, some small coupes and sedans I see the ballast on the floor near 
> the driver instead of out back under the bumper. I wonder what is going 
> there? Maybe it is to get the CG substantially ahead of the CP. If you don't 
> have much room and the trade is CP vs. PM then I guess you have to opt for a 
> correct CP. -Elon 
> 
> -----Original Message----- 
> From: neil@dbelltech.com [mailto:neil@dbelltech.com] 
> I think the main point of having a high polar moment of inertia in an LSR 
> vehicle is to keep the car controllable. A low PM vehicle is great for 
> autocross and road racing as it can change direction fast. Once you lose it 
> in a mid-engine car it spins very quickly. This makes it difficult for the 
> driver to gather it up again 
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