This engine was the ultimate in turbo compound engines.
Every effort was made to optimize the multi stage compressor and turbine
sections. No expenses was spared. It used a variable gear
ratio between turbine and crankshaft. The only thing it lacked
was a variable nozzle for the turbine. The BSFC was in the
mid 30's or about .35.

The only real difference in this engine and what P & W is trying to
patent is a two stroke diesel was used as a gas generator instead of a
Wankel. It did not have the benefit of the 20 years of detail development
applied to the CW R3350 TC. It is ironic that these engines were 50
or 60 years ahead of their time.

For aircraft use, and at speeds below 400 MPH, the turbo compound engine
driving a propeller will be un-excelled in terms of MPG.

The Wankel advantage has not yet been explored but the potential
is there due to simplicity and a lack of exhaust valves dissipating
valuable kinetic energy.

Paul Lamar ...No rotor no motor.

Truly amazing recovery gear train Paul! I am also interested in the
fact that they used an axial supercharger is also interesting. The
Use of the recovery turbine to assist the supercharger is probably
a first too. Funny that this engine seems to have been sewing the
seeds of its own demise, in that if you take that silly piston engine
out of the loop you have a fairly modern looking jet engine!
Bill Jepson

"Below this was a complete turboprop engine, based on their Naiad design."
Wikipedia


Paul Lamar

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