[ODE] Vehicle Gears/DriveDrain/Engine techniques.

[David Whittaker]

> I'm soon to be creating the engine/drivetrain for my vehicles.  Looking
> for  any techniques others have used.
>
> Has anyone had any luck simulating gears using real torque curves?  In
> other  words, if all the units for my vehicle are correct, and I apply
> drive torque  derived from real torque curves and gear ratios, will the
> vehicle behave  realistically.
>
> I think in theory it should but was wondering if anyone has done it.
>
> Also, how is DesiredVelocity handled in this situation. Is it acceptable
> to  just make DesiredVelocity some arbitrarily large value and let the
> max  vehicle speed be limited by different drag/resistance forces?
>
> -jeff
>

I don't have any experience with using this method, but I don't see why it
wouldn't work.  With enough external forces (i.e. drag/wind resistance), a
car should (theoretically) reach a "terminal velocity" that would be it's
max speed, based on the fmax (i.e. your torque) of the joints pushing it
against these external forces.

The desired velocity paramter could be set to some big value, and just let
the fmax and external forces determine the car's velocity.  But then a car
capable of going 200 mph couldn't go 60 without gas-brake-gas-brake kind
of motion.  So you might relate an analog gas pedal directly to desired
velocity.

>
>
>
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