Paul, is this engine giving us a 3 to 1 ratio?
Seems to be.
Royce

 Reduction gearboxes fitted as an integral part of Mid West rotary engines and
incorporating torsional dampers, allow the propeller to turn relatively slowly.
The reduction ratio of the twin-rotor GAE100R unit, for example, allows the
propeller to experience six power impulses per revolution. That sort of power from
a conventional direct-drive would require a twelve cylinder four-stroke engine to
achieve the same smoothness of delivery. Similarly the single rotor GAE50R can be
equated to a six cylinder, direct-drive engine. Any vibration which may be felt
from a Mid West engine can almost certainly be attributed to imbalance in the
propeller.

Sounds like it.

Paul Lamar

I forgot I had this chart. With 7,000 pictures of rotary stuff
in my collection I sometimes forget about things.

Paul Lamar
 
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