Is it possible to animate motor constraint speed?

I am using the “motor” type of rigid body constraint (outside the game engine).

The controls let you specify the speed. I’m using it for a vehicle. works great. But I dont want the speed to be constant, rather I want to animate the vehicle - have it start slow, then go fast, change speeds, etc.

Is there a way to animate motor speed (outside of the game engine)?

thanks,

Matt

p.s. another helpful poster suggested a way to do this in the game engine - I may do that - but i would like to do it outside the game engine for other reasons.

Place your mouse curser over the velocity setting and press I or RMB / Insert keyframe to animate the value

OMG i didn’t know you could do that. Thanks!!! Wow now I can keyframe all sorts of stuff.