The 'Ocelot' VTOL Aircraft
This is the Ocelot! It is an alternate build of the LEGO 42120 technic rescue hovercraft set (seen right, below). It uses only the parts from the set, with no extra parts added.
The landing gear is connected to the rotor position through a series of beams. When the gear folds down, the rotors are tilted up in the take off and landing position. When the gear is folded into the body, the rotors tilt forward, ready for horizontal flight.
Getting the two mechanisms to line up together was quite challenging. There's also some tricky geometry with how the fuselage is an even number of modules and the bars that support the wings are an odd number (typical for technic). What i had to do here was use angled connectors to get it all to work!
It also features an opening cargo bay, and moveable rudders at the rear.