[ODE] Initial conditions problem

[Marco Grubert]

ODE is all about forces / acceleration. Directly feeding it velocities can 
be done but is considered bad practice and can lead to instabilities. The 
alternative to impulse movement is applying a huge force for a brief 
duration, but that can also mess things up. Thus the best approach: apply a 
medium force over a period of time until your projectile reaches the desired 
velocity.

- Marco Grubert