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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!eagle!lims02.lerc.nasa.gov!xxkozak
- From: xxkozak@lims02.lerc.nasa.gov (GEORGE KOZAK)
- Subject: Re: Horsepower calculations?
- Message-ID: <21DEC199222361454@lims02.lerc.nasa.gov>
- News-Software: VAX/VMS VNEWS 1.41
- Keywords: horsepower
- Sender: news@eagle.lerc.nasa.gov
- Nntp-Posting-Host: lims02.lerc.nasa.gov
- Organization: NASA Lewis Research Center
- References: <92343.162029DAB134@psuvm.psu.edu> <1992Dec9.162710.3364@hellgate.utah.edu> <1992Dec10.112853.11373@hellgate.utah.edu> <1992Dec21.210236.564469@locus.com>
- Distribution: usa
- Date: 21 Dec 1992 22:36 EST
- Lines: 49
-
- In article <1992Dec21.210236.564469@locus.com>, rich@locus.com writes...
- >In article <7694@pharaoh.cyborg.bt.co.uk>, ian@pharaoh.cyborg.bt.co.uk (Speed Freak) writes:
- >|> xxkozak@lims02.lerc.nasa.gov (GEORGE KOZAK) writes:
- >|>> 3
- >|>> HP = 200 (WT/ET ) (WT divided by ET cubed)
- >|>
- >|>> Where WT = total weight of car, driver, etc. in pounds.
- >|>> ET = 1/4 mile Elapsed Time in seconds.
- >|>
- >
- > I have trouble with any formula for Horse Power based on ET.
- > Surely, it must be a minimum number. After all, how many of us
- > have "perfect traction". Let me make a few "strange" examples...
-
- You're exactly right, Rich. Getting your HP numbers from the ET
- assumes a "perfect" run. There are too many variables that affect ET
- to get an accurate HP reading from any given run. However, a series
- of runs averaged out can give comparison numbers.
- >
- >
- > The formulas (and charts) that I saw and used (years ago) were
- > based on Top Speed through the traps.... Again, only an
- > approximation, and only a measure of what horsepower you were
- > using when you went through the traps... Unfortunately, I have no
- > idea where my copy of the formula is... sorry.... flames to
- > /dev/null...
-
- The equation that you may have missed in the original post was...
- .333
- SPEED = 10 + [ 221 (HP/WT) ]
-
- By substituting various HP's at a given weight, the observed speed
- can be calculated. Or you can rearrange the equation to solve for HP.
- This equation assumes the car "hooks up" at some point and the driver
- doesn't lift in the traps. Initial traction and shift points aren't
- important with this one. Both equations assume the run is not aborted.
-
- >
- >
- >--
- >Rich Silva
- >Locus Computing Corporation rich@LOCUS.COM
- > {uunet,ucivax,trwrb}!lcc!rich
- > {randvax,ucbvax,trwspp}!ucla-se!lcc!rich
- >
- George Kozak
- Kozak Racing
-
-
-