Hi
 Do you have a HP / RPM graph for a 13B engine.

 Paul M

 Stock side port or or P-port?

 Here is an early 13B of around 1989 and some others.
 Note the 800 HP drag engine is running on Alcohol
 and can drive a 2000 pound car to 153 MPH in the
 quarter in less than 8.66 seconds.
 The engine is VERY ROBUST. That is about 4 HP
 per pound of engine weight.

 Paul Lamar
 --

Weight?  With more than 400 lb-ft of torque, there ain't much
weighting when this rotary leaves the line!
j [pun] d

Hi
Thanks for the info. Could you run a rotary without a PSRU and  using a
small dia prop, My aircraft needs only 100-110 hp for T/O and about 80 for
cruise I know there are other options one rotor ect, but the two rotor takes
my fancy
Paul M

You wind up with a poor power to weight ratio and a inefficient
prop. HP is almost a straight line function of RPM. To get
the engine to run smoothly at 3000 RPM you need to start with a side
port that is about 200 HP at 7000 RPM so 3000 RPM would be about
86 HP. Not good and it would weigh about 260 pounds firewall
forward. The intake runners would need to be about four feet
long. Rotary engines are all about RPM. A turbo charger would
help. A super charger would burn more fuel. Not a bad way to
go if you don't mind the fuel. You should be able to get it
up to about 100 HP at 3000 RPM

Paul Lamar

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