i have been breaking my head for days trying to create a script for a helicopter, yet it has been prety disastrous and halarius at the same time. i have ran out of ideas on how to do it and i dont find any tutorials, examples, what ever (that is free since i got no way of paying). i realy apriciate your help, happy christmas everyone 
This is the best most popular one I’ve seen :
- http://forum.unity3d.com/threads/41418-Helicopter-Tutorial
- http://www.3dbuzz.com/forum/threads/187766-Unity-Helicopter-tutorial
Although the link to the pdf seems to be broken, so I’ve uploaded it for you Here (right-click, save link as…)