To the Rotary People in the Know:

I am very interested in the power density and all-round performance of the
rotary engine.  Below is the well-known PLANK formula for the calculation of
theoretical HP for reciprocating engines.  My Question for the Rotary People
in the Know is:  Is there an equivalent formula for theoretical engine HP
for the rotary engine?

BTW, the formula shown is the theoretical HP for the eight-cylinder Zoche
aero diesel engine, which I'm sure many of you have seen at Osh.  I don't
know if he has anything in production yet but I doubt it.  Norman DeBoer

HP = PLANK / 33,000

146    

P = Indicated mean effective pressure in psi.  [Bore: 3.74 inch  (mm): 95]0.31   

L = Length of stroke in feet or fractions of a Stroke  [3.70 inch (mm) : 94]10.99 

A = Area of the piston head or x-sectional area of the cyl. (in squared) 2500  

N = No. of power strokes per min = rpm: 2-stroke;  rpm/2:  4-stroke 8   

K = Number of cylinders.......Compression Ratio = 17 :1

HP =  300.......Total Displacement of Engine = 325.3 cubic inches

Not that I know of.

Paul Lamar
 
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