The concept is to feel g-forces through cochlea ear instrument, hacked by helmet movements that come from two RC servos arms controlled by software telemmetry. Which means that your head will become a joystick being contolled by virtual enviorment simulations, like cars, copters, or anyother form of vehicle.
ForceStick DIY 55$ 2 DOF Motion Simulator
http://sites.google.com/site/forcestick/Home
Hope Community Enjoy it.