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Re: drag/frontal area

To: Higginbotham Land Speed Racing <saltrat@pro-blend.com>
Subject: Re: drag/frontal area
From: Joe Amo <jkamo@rapidnet.com>
Date: Tue, 06 Nov 2001 13:43:31 -0700
How did you get .14 cd with 840 hp and 270mph??
Joe

Higginbotham Land Speed Racing wrote:

> Joe, it is half the frontal area for starters and has 2 wheels....might
> have something to do with it???
> I didn't say I was correct....just that I made some assumptions in the
> absence of factual data.
>
> Skip
>
> At 01:18 PM 11/6/01 -0700, you wrote:
> >Skip looking at just know data
> >says something is off in these
> >"calculations":
> >you went 270 mph with 840hp
> >Ez hook reached a speed of 301 mph with 170hp in 96'
> >Joe :)
> >
> >john robinson wrote:
> >
> >> At 11:50 AM 11/6/01, you wrote:
> >>
> >> >Yes but for me:
> >> >
> >> >Trouble with that is I have lakester data and am trying to apply it to
> >> >streamliner......
> >> >I think the lakester Cd is about .14 based on 840 hp and frontal area is
> >> >about 13.5 sq ft. (speed 270)
> >> >If I assume that the Cd of the wheels and tires doubles the Cd of the
> >> >liner, then the liner Cd is .07
> >> >I still think that there are too many assumptions and the only practical
> >> >way to prove it is to run and then do "coast downs".
> >> >Skip

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