R
The reduction gears make turbine power usable over a range of speeds,
just as the gears of a multi-speed bicycle help make the most of the
legpower pushed into the pedals, but they
must be rigidly attached to the propeller shaft
just as the gears of a multi-speed bicycle help make the most of the
legpower pushed into the pedals, but they
must be rigidly attached to the propeller shaft