Dave, all....
Well, my old data shows that the frontal area is 18.07 square feet, so we
are pretty close. As to aero efficiency are you talking lift to drag, glide
path or what? If you are talking how fast is the race car, have to remember
that the top is removed, will ultimately have no wind screen, has an air dam
up front and is closer to the ground. I been figuring that my Cd has dropped
to around 0.37, still pretty poor compared to today's cars. I will weigh
less than 1800 pounds with me in it. I have a 5 gallon tank. So using the
excel spread sheet, how much hp does it take to get to 204 mph? Ditto, given
650 FWHP how fast...work that problem and tell me where the program does not
work for you. Use cell references and list the step by step actions and tell
me what vesion of excel yo are using.... Oh as to the frontal area, the wind
screen is about 13 or 14 inches tall by about 54 inches wide (guessing
here...) convert to feet, multiply to get sq ft then multiply by about .8
and get 4.8 or so, subtract from 18 and get 14 sq ft. If it has been a while
since you surfed the site and the data etc, all this is in there
already...MAybe I should put together a treatse on how I am doing it, with
all the math etc then we can see where it all falls apart on race day? What
ya'll think? I'll even throw i the turbo stiff although it is secret...
mayf
----- Original Message -----
From: "sosnaenergyconsulting" <sosnaenergyconsulting@cox.net>
To: "DrMayf" <drmayf@teknett.com>
Cc: <land-speed@autox.team.net>; <tigers@autox.team.net>; "Alpine Mailing
List" <alpines@autox.team.net>; "fordnatics"
<fordnatics@lists.mustangworks.com>; <tweecer@yahoogroups.com>
Sent: Monday, December 02, 2002 4:52 PM
Subject: Re: Added Stuff to my Web Site..
> Hi Mayf:
> According to contemporary road tests, the frontal area of a Tiger is
> 17.3 s.f.
>
> So, what's the aerodynamic efficiency of a brick?
>
> Regards
>
> David Sosna
>
>
> DrMayf wrote:
>
> > This weekend, I was asked to help the Factory Five Cobra folk to
determine
> > how fast their cars could go given flywheel horsepower or conversely,
how
> > much horsepower would it take to go a certain speed. In the process, I
added
> > a write up for them on my web site. I wrote a dinky Excel spreadsheet,
using
> > Office 97 version of Excel that can solve for speed given horsepower. Or
> > horsepower given speed (which by the way is far easier to do!). I have
> > zipped the Excel file into LSRTS.ZIP for your downloading pleasure: it
is
> > only about 20Kbytes soit does not take long. Unzip, open excell and use
it.
> > I would be interested if you find it informative or even useless. To get
to
> > it: Cobra Analyses http://www.teknett.com/pwp/drmayf/cobra.htm and
> > http://www.teknett.com/pwp/drmayf/files.htm
> >
> > May the force (horsepower) be with you and that these things actually
work
> >
> >
> > mayf the red necked ignorant desert rat in Pahrump
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