The Hot Cycle Pressure Jet Flying Crane

The "direct" Hot Cycle Pressure Jet helicopter, using the exhaust of turbojet engines for rotor tip propulsion, is described. Flying Crane helicopters using "direct" Hot Cycle propulsion are compared with cranes using turbine powered geared rotors, cold. cycle tip-burning pressure jet rotors, and rotors driven by tip-mounted turbojet engines, Superiority is claimed for the Hot Cycle Flying Crane, based on its potential for lifting and transporting more payload per pound empty weight than other helicopters considered.