>> What torque pulses? Today was the first run with the complete
engine >> in
>> flight configuration,
>> meaning engine - psru - prop. No vibration out of the
ordinary. It, >> off
>> curse, is shaking
>> at 1300 RPM idle, just as my Soob does. Once it goes over 1700
running
>> like an electric
>> motor, almost. Didn't go over 5k yet, have to make sure
everything >> stays
>> together.
>> I am using the testing now for power optimizing and just
running it >> until
>> something
>> wears out or brakes. In the meantime the flyable components
still >> missing
>> will be
>> designed and built for the final configuration.
>>
>> Richard Sohn
>> N2071U
>
>> This is a p-port engine folks.
>>
>> Paul Lamar ...No rotor no motor.
>
> Congratulations!
>
> A p-port no less. Carb or FI?
>
> Doc Custer
> Retired Software Engineer and sometime Audiologist
>
> Its a carb.
>
> --
> Paul Lamar ...No rotor no motor.
The intake system is not final. I am presently running a 36mm
Mikuni,
flowing 5gph gas at 5000rpm.
Richard
What Richard is saying here is 5 gph is 30 pounds per hour at a BSFC
of .5 that is about 60 HP. 36 mm is of course about 1.4 inches
in diameter
so this will give you a good idea how much HP a 2 rotor p-port
engine with that size
runner will generate at 5000 RPM. Probably a bit more with a
longer runner
around 30 inches. So for a two rotor you are looking at 120 HP at
5000 RPM.
Assuming for the moment the HP curve is still a straight line at
5000 to 6500 RPM
you will get 156 HP at 6500 RPM. If the straight line function
still holds 168 HP at
7000 RPM.
1.400 inches inside diameter has an area of 1.54 square inches.
1.875 inches inside diameter has an area of 2.76. Pushing the
linear extrapolation
envelope here..... the HP for the larger dia. runner P-port is
then estimated
at 300 HP. We are NOT getting that. We are getting 240 HP on the
dyno so obviously
power is not directly proportional to intake port area. We are
now obviously
in the convex portion of the p-port HP curve.
Paul Lamar ...No rotor no motor.
Paul,
It really is looking somewhat better than that, my present one
rotor is
based on 12A rotor and housing. If compared to a 13B you have to
multiply
the hp by 1.14, which would be 68hp.
Sorry for not pointing that out earlier.
Richard
Thanks for doing this Richard. All the one rotor guys ought
to snap this engine up.
Paul Lamar ...No rotor no motor.
I would like to snap it up. I am afraid I will die before it is
available. Jerry
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