Re: TC

["glen barrett" <speedtimer@charter.net>]

Back when Arfons, Breedlove and other jet cars were running they all had
giant rooster tails and no tire spin. We have checked the clocks with a pick
up truck and other vehicles and they had small rooster tails and no tire
spin.
Glen
----- Original Message -----
From: "Bryan A. Savage Jr" <basavage@earthlink.net>
To: "rtmack" <RTMACK@pop3.concentric.net>
Cc: "List Land Speed" <land-speed@autox.team.net>
Sent: Saturday, December 01, 2001 8:14 AM
Subject: Re: TC


> Russ,
>
> I believe Tom is correct:
> > 1. Rooster tails on the salt are not from wheel spin - it is caused by
> > the vacuum created behind the car. The severity of the rooster tail has
> > much to do with how much loose salt is on the course. I say this because
> > of experience in a low HP car that rarely spins its wheels but generally
> > carries a tail from about the one mile.
>
> and this is why.
> 1) An aerodynamic change Howard made to the old 448 reduced the rooster
> tail from 20-30 feet to 6-10 and the speed went from 240 to 250. There
> was absolutely no other change. Two sequential runs about two hours apart
> at World of speed.
>
> 2) While I was on patrol in 1986 I noticed that the rooster tail didn't
> disappear when the driver shut off the engine and it didn't vary
> when the driver was on and off the throttle trying to control wheel spin.
>
> 3) Front wheel drive cars have rooster tails.
>
>
> My conclusion from these observations is that salt is lifted into the air
> by wake turbulence resulting in what we call a rooster tail.
>
> Bryan

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