[Milsurplus] 400 cycle 3 phase and WW2

[Ray Fantini]

Thought all the old WW2 stuff ran from 28 volts DC and the B-36 was the first aircraft to exclusively use 115 volt 400 cycles 3 phase AC distribution? Being that AC distribution reduced design weight by several thousand pounds on a large aircraft. Recall reading something along this line in "Magnesium Overcast" by Dennis Jenkins. Maybe there was some application of 400 cycle AC prior to the B-36 but don't know what it would be. Did the old GO and GP transmitter have engine driven generators or motor generators  to develop their voltages from the ships DC distribution?
Ray Fantini KA3EKH