Rotary firings

[Zack]

On a rotary each phase of the 4 stroke cycle requires 270 degrees of 
crankshaft revolution, for a total of 1080 degrees for the complete 
power cycle.  In a 2 rotor engine there are 6 combustion chambers so 
a chamber fires every 180 degrees, in terms of number of power 
pulses per crankshaft revolution like a 4 cylinder piston.  
There's a 90 degree overlap between consecutive power pulses, in that 
sense it is like a 6-cylinder piston engine.


> << 
>  The each rotor will fire 3 times per rotation.  This would be a total of 6
>  exhast pulses per eccentic shaft revolution.  I thought that a 2 cylinder 4
>  stroke would have 1 pulse (1/2 per cylinder) per crankshaft revolution.  If
>  I am not correct on either, could someone explain why? >>
> 
> Simple: 4 strokes = intake (1) compression (2) Power (3) Exhaust (4) 
> Each stroke takes 180 degrees of revolution therefore: Intake lasts 180
> degrees
> Compresson lasts 180 degrees Power lasts 180 degrees and Exhausts lasts 180
> degrees.  2 cyl 4 stroke would make 1 power stroke for each revolution of the
> crankshaft.