Acceleration?

I am making a racegame, and i want the player to be able to accelerate with the upper arrow key.

Is there any way to make this happen with just logic bricks, so without python?

I know I can use simple motion, but that is not useful since u will go just as fast as your opponent

use servo motion

thank you,

im checking for a tutorial now

ben2610 gave a really good description of the servo actuator in this thread:
http://blenderartists.org/forum/showthread.php?p=1197062

You can also get a very in-depth explanation of how it works by looking on wikipedia for “PID controller”

Don’t be confused by wikipedia though. It’s actually pretty simple to use when you get the hang of it.