A project log for 'Bird of Prey II' Super Long Range VTOL UAV

Flight time and versatility will be vastly extended using a combination of multirotor, blended wing, and hydrogen fuel cell technologies. 01/06/2018 at 05:410 Comments

the first prototypes will be electric powered as hydrogen fuel cell systems require a certain scale to be an efficient power source. Hot wire formed foam with carbon fibre reinforcement and 3d printed structural components where needed is a good place to start.

The foam prototype airframe will be built in four main pieces;

Wings x 2

Fuselage bottom

Fuselage top

Laser or scroll saw-cut wood airfoil profiles will be created for wing tip and wing root. A hotwire cutter will be used to cut a rigid foam slab into the desired airfoil shape by following the wood profiles.

Fuselage bottom and top will be shaped via MPCNC, leaving interior cavity for electronics and power source. 

At least one carbon fibre spar will act as both a strengthening reinforcement for the wing and a mount point for vertical thrusting propsets through the through-port that is through the wing. Another spar may be added toward the trailing edge.