The flight sim "Bensen" Gyrocopter is similar to Ken's Little Nellie, and is my favourite little fun run/fly about!
The early Gyrocopter's rotor had to be "pre-rotated" by hand to reach safe take off revolutions.
The latest Gyrocopters are fitted with "pre-rotator gears" which couple the rotor to the engine gear-box via a flexible drive.
The drive is disengaged when the craft is in the air, and the rotor continues to spin with air passing through the blades, thus obtaining lift whilst in flight.
The flight sim "Xenon" Gyrocopter is interesting, in that the pre-rotator can actually be engaged/disengaged with the use of the flight sim "Flap" control!
Engage for a quick take-off, and disengage when safely in the air at altitude.
One of the cheapest methods of taking to the air....
....a flying Deck-chair!
Paul...

...!
Search the flight sim sites for FS 2002/FS 2004 "Bensen", "Barnett" and "Xenon" Gyrocopters!
Have fun with them!...>>>
http://en.wikipedia.org/wiki/Bensen_B-8
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.