Thanks. I've now made available a playable version of my helicopter if people want to try it.

It can be downloaded here
http://rapidshare.com/files/234933301/SAR.rar

You can't do much at the moment other than fly around and pick up things with a hook but it's a start.

Controls
Arrow Keys - Roll Forward, Back, Left & Right
A - Up Thrust
Z - Down Thrust
Delete - Rudder Left
PageDown - Rudder Right

Mouse to rotate camera, mouse wheel to zoom in and out.