The first part of the paper describes initial test results obtained on an experimental installation of the differential compound engine. The initial tests broadly confirm the predicted torque–speed and power–speed relationships which are appropriate to traction-type prime movers, and are intended to eliminate the need for multi-ratio gearboxes or their hydrostatic or hydrokinetic equivalents.
The second part of the paper contains performance predictions based on certain cycle and component modifications such as interburning before the auxiliary turbine, and variable nozzles.
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