Mr Helmholz - simple model

[Todd....!!]

Thanks for the info Bill!,

Will be savin your 'back to basics' formulas and ideals!

Thanks for unclouding the fogginess and confusion from some of our
thinkin!

In drag racing the stall should be set between max torque and max HP, I
believe that if we just used a stall the stalled right at our red line
that we would get the best e.t. and MPH in the 1/4... If we could keep
from spinnin &/or breakin...

LATER!

Todd....!!
http://www.c-com.net/~atc347/toddlnk.htm


Bill Bradley wrote:
> 
> > > I don't know, but don't hp and torque curves always
> > > cross at 5252 RPM?  How would that work on any engine
> > > that has a peak HP over 5252 RPM?
> >
> > Yes they do... Just means that as the Torque and HP cross at 5252, the HP is
> > rising and the torque is falling.
> > they don't stay the same above 5252.
> 
>         Wrong.  The torque curve could very easily be rising,
> HP=torque(lb*ft)*rpm/5252.  They always cross there.
> 
>         As far as the Max torque vs. Max Hp issue.  Torque =Force x radius
> so the maximum force accelerating the car is directly proportional to the
> maximum torque.
>         Power=Work/time, but it also equals Force*velocity, so the maximum
> force at any given speed is at maximum horsepower (the gearing is irrelevant)
>         So for maximum acceleration you want the revs to be at peak hp. For
> those of us with normal transmissions, the usable power curve is more
> important than peak, which is where the maximum torque is a factor.
> 
>         Bill