Entry for the 'Helicopter Challenge' set by Griffith. This machine flies fairly well and should hopefully minimise frame rate drop on your device. It is capable of water landings, and can sustain relatively hard ground landings without breakage. Plenty of fuel to last a while also. I should probably explain its roots, and is loosely based on the Kamov KA-8 Co-axial helicopter of the 50's, a revolutionary and pioneering aircraft that has evolved into some of the world's most capable military rotary wing vehicles. The CAV-3C here has been based on the layout of the KA-8 to an extent, evident from its exposed framework structure, and Co-axial rotor system providing adequate stability in flight. RCN has been used of course, since a 'cyclic' method of control over the rotor hub causes horrific frame rate problems, and generally is highly unreliable. I have however, more or less replicated the 'collective' theory of modern helicopters, where the pitch of each blade provides a degree of lift for the entire machine, made possible by high rotational speeds. Increasing the throttle on this machine causes the rotation speed to increase, and also increases the pitch of the blades, thus providing upward propulsion. In order to make this thing fly, first hit activation group 1, then throttle up to about 60% (any more is possible but unnecessary). Simply use normal flight controls after that to keep it going! The maximum speeds I have reached with it are in the region of 90-100mph. Maximum height is uncertain. Applying the brakes extends one airbrake on each float that will slow it down in water, but not necessarily on land.