Some answers from the source

Douglas Fir wrote:


Dear Paul.

The ex Mazda engineers immensely enjoyed the flying videos.  Thanks for your
hard work:)

Some points I confirmed. As follow is our 'exchange'  I am marked with a *

*Under that you made a note RE  Best BFSC = 200 - 210 g/ps/hr  @ A/F =16?

Correct is A/F=16

*RE is the side port 13B?

Side port and peripheral port is almost same at each best conditions.

*Many of my friends on the mailing list believe the Renesis engine obtains
better fuel mileage than the 13B side port. above 3,000 rpm. I don't know
what to  say.

I don't know too.  Renesis side exhaust port has a little gain of expansion
ratio, it may improve thermal efficiency. But this gain is not so big.

.......In addition My friend wonders if the arrows indicate air flow in the
Diamond rotary.  He doubts the blower is for air cooling the rotors because
the bearings need oiling.  Harry Batson could you confirm this?

Thanks

Doug in Japan


" Some points I confirmed. As follow is our 'exchange'  I am marked with a *
*Under that you made a note RE  Best BFSC = 200 - 210 g/ps/hr  @ A/F =16?
Correct is A/F=16"

I am confused about this statement. Are you talking about the Lemans engines
BSFC air fuel ratio?

Paul

Paul

Thanks for the info on the diamond engine.
We were talking about the 13B engine and as I mentioned when I posted this
the first time Tracy probably has experience at running on leaner mixtures.

Doug in Japan


OK 200 g/ps/hr is another strange way of expressing BSFC. A mixture of Metric
and English units. 200 g is 200/454 pounds so that is .441 pounds of fuel per hour. 
That is a very good number. 210/454 is .463 pounds of fuel per hour.

Paul Lamar
 
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