Rotary firings

[Quinton McCombs]

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?

At 11:54 PM 9/16/98 -0400, Clare Snyder wrote:
>Bruce Plecan wrote:
>> 
>> Just a tad rusty here, but (on a 2 rotor rotary), aren't the rotors, and
>> shaft geared at 1:1,so at 1K rpm there are 2K exhaust pulsations?...
>>   Where as in a 2 cylinder 4 stroke would only have 500 pulsations
>> per minute at 1K rpm idle?.
>>   EFI content is that this is in reference to O2 sampling.
>> Cheers
>> Bruce
>Nope - usually NOT 1:1 Closer to 3:1 if I remember from back in the R100
>and RX3 days when I worked for a Mazda dealership.
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>                           Clare Snyder
>                         Waterloo, Ontario
>