| Abstract | In reference 1 various gas turbine powerplants were compared for a VTOL aircraft, in which lift was obtained by fans Immersed in the wings, and horizontal propulsion by jet reaction. The powerplant consisted of four turbo gas generators, eight fans with drives, and the ducting, valves, nozzles, etc., necessary to obtain either the vertical lift or the horizontal propulsion.
The criterion in the comparison was the total powerplant plus fuel weight required to fulfill a given flight mission. The weight of the fans, drives and accessories was obtained by sketchily designing them, and then calculating the component weights. The weight of the gas generators was established by reference to the current literature on turbojet engines, since the gas generators were in fact such, when used for the horizontal propulsion of the aircraft. |
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