RE: Engine Config

["Dave Dahlgren" <ddahlgren@snet.net>]

try this out.. use 1900 lbs and 5000 hp at the flywheel
http://robrobinette.com/et.htm
http://www.fantasycars.com/derek/quartmile.html
http://www.virtualengine2000.com/Calculator.htm
for a 4.42 et they all come out around 5000 not that the web is correct
about anything but all 3 different people must be wrong as well. It is hard
to assume average rates and average aero loss.
Dave
> -----Original Message-----
> From: owner-land-speed@Autox.Team.Net
> [mailto:owner-land-speed@Autox.Team.Net]On Behalf Of John Burk
> Sent: Tuesday, January 04, 2005 1:54 PM
> To: land-speed@Autox.Team.Net
> Subject: Re: Engine Config
>
>
> Dave - In reference to your doubts about a blown fuel drag engine realy
> putting out the claimed hp do you agree with these numbers -
> Distance fallen
> in 4.42 seconds at 1 G is 1/2 A (16) X seconds squared (4.42 X
> 4.42) = 312.58'
> - Average acceleration for 1320' in 4.42 seconds is 1320'/312.58'
> = 4.22 G's -
> The accelerating force for a 1900# object at 4.22 G's is 8018# -
> If the engine
> is running for the entire time the equivalent of 332 mph (472.27
> ft/sec) the
> hp is ft lb (472.27 ft X 8018 lb) per second (1) /550 = 6884.84
> hp - The true
> hp would be reduced some because the engine runs less than the
> equivalent of
> 332 mph earlier in the run - Because the 6884.48 hp doesn't
> include the aero
> drag (plenty) 6000 to 7000 hp can't be far off - John