Gyrocopters are real fun to fly, completely different from Helicopters!
I have a number of them in my Flight Sim Hangar, and they are wonderful for warm sunny Sunday afternoon Flights around the local countryside, only requiring a few feet of travel for take-off and landing!
On the original versions the rotor was spun up by hand before take-off, but modern versions are "pre-rotated" with a connect/disconnect flexible drive from the engine gearbox.
During flight there is no mechanical connection between the engine and the Rotor. (There is no tail rotor). The engine merely drives the propeller for forward motion!
The Rotor is merely a freely "rotating wing" to obtain lift!
Download one, and give it a try....You may get to like it!....

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Paul.....Gyrating on a sunny Sunday afternoon!...

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..all about the fun machines!...>>>
http://www.youtube.com/watch?v=p8IB-5PbL9U
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.