G'day. This is my entry to the Technic C-model contest. I borrowed my sons lego set and created this helicopter loosely based on the Apache helicopter.
I used the technic set 9394 Jet Plane 499 pcs, http://brickset.com/...394-1/Jet-Plane.
The biggest challenge was to make it different to other helicopters and with limited pieces, so I came up with the idea of a handle and trigger that the faster you pulled the trigger (lever) the faster the rotor would spin but still be able to be free spun. Then have removable weapons and be sturdy enough for kids. 4 days of play from 3 boys it still works.
Free Rotating rotor blades.
Removable swivel undercarriage gun.
Removable rocket/missile wing store pylons.
Retractable front main wheels.
Retractable handle for one handed use to lever to spin main rotor blades.
Geared and sprung lever to spin main rotor blades.
Movable pilotage system.
9394 C Model Helicopter by jono.rocky, on Flickr
9394 C Model Helicopter by jono.rocky, on Flickr
9394 C Model Helicopter by jono.rocky, on Flickr
9394 C Model Helicopter by jono.rocky, on Flickr
9394 Left over pieces by jono.rocky, on Flickr