light twins?

Rusty,

Yes, I meant exactly what you said: three power pulses per single rev of the
rotor, and one pulse per rev of the e-shaft.

Regards,

Gordon.

PS: I like that you are using a turbo as a muffler -- not much more weight,
similar or even better noise reduction, not to mention the power.




"Russell Duffy" wrote in message
...
As far as I can see, this cannot be valid. If I'm thinking this through
correctly, each rotor will make three power pulses for each revolution of
the rotor, or one revolution of the e-shaft.

My recollection from my mechanicking days is that the eccentric shaft
rotates at three times the speed of the rotor.

Abolutely right Corky. Gordon got it right in the rest of his post, so I
just figured he left out a word above, and it should have read "one PER
revolution of the e-shaft".

Cheers,
Rusty