Re: Problem with "NA"

[Juan Pablo Carbajal]

On Wed, Feb 20, 2013 at 6:37 AM, Terry Duell <address@hidden> wrote:
> Nothing like any of that. Just plain old equations of motion f=ma, where the
> f's are forces due to tyre spring, suspension spring, damper velocity etc.
> Nothing out of the ordinary.

Hi Terry,

f = ma is indeed f = m d²x/dt²
most solvers would ask you to put that equation as a first order
system and ussually you get something like
dx/dt = v
dv/dt = f/m

Debugging the physics is indeed the first step, and you can do that
without getting too much into the math. Debugging a wrong input to the
integrator would require you to understand how the particular solver
is implemented, that can be mathematically involved. Roll up yours
sleeves!!