The lever arm affects torque but not gear ratio the whole 'belt has to touch
the ground before you can have another rev. If you think not tell me why.
Get an old or new lol fan belt and play with different shapes, round oval
etc. and see what I mean. With a TF car the OD of the belt changes I doubt
if that happens to a large degree with a LSR tire run at an appropriate
pressure like 75 to 90 psi,
Dave
----- Original Message -----
From: "Elon" <saltfever@comcast.net>
To: "land-speed submit" <land-speed@autox.team.net>
Sent: Friday, April 25, 2008 10:20 PM
Subject: [Land-speed] A Protocol Question...
> Hi Jon. Think of the lower tire radius as a lever arm. It's the lever arm
> (and its length) that does all the work to move the car forward. That
> length
> of the arm also affects the overall gear ratio. And you know gear ratio is
> directly coupled to revs per mile. Think of a top fuel car and the wheel
> growth at speed. As the tires grows in height the lever arm increases in
> length. You might say tire growth is an infinitely variable ratio. Maybe
> this is a poor example, but how about a track-laying Caterpillar tractor?
> The ratios and revs per distance is controlled by the diameter (or radius)
> of the sprocket and not the length of the track. Your tires footprint
> (squat) is a semi-type of track layer, no? -Elon
>
>
>
> while the radius on the bottom half is smaller than that of the top, when
> loaded
>
> -- I don't understand how that would change the circumference. That
>
> is, the distance all the way around the tire does not change -- all of
>
> the rubber must still roll down the road, even if the axle gets closer
>
> to the ground.
>
> Jon Wennerberg
>
> Tall guy with moustache
>
> and a pair of 2 Club hats
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