AERONAUTICS: A Nine-Engine Seaplane

The Navy is quietly constructing at Philadelphia the largest flying boat yet attempted. The great interest of this boat is not in its size, however, but in the power plant system. Nine Liberty motors are used, in three power plant " eggs "—in each of which three motors drive a single propeller through a common shaft. Any motor that fails can be disconnected by suitable clutches, and there is ample room for its repair by the mechanicians on board. The stoppage of one, two, or even three motors will not necessitate a...

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