Rotary firings

[Greg Hermann]

 Getting a handle on the real swept
>> displacement number for any given Wankel engine readily explains why they
>> perform so strongly (despite poor VE) and (together with poor VE) why they
>> get such lousy mileage.
>>
>> I don't remember perfectly at this point, but I believe that it was an RX-3
>> motor that I measured, and calculated the actual swept displacement for
>> once upon a time, using my derived formula. Didn't Mazda claim that the
>> RX-3 was the equivalent of an 1800 cc piston engine???? The hard
>> calculation showed that it has more like the equivalent of 4.2 liters of
>> swept displacement, if memory serves!!!! Even if the number is off, the
>> difference between what Mazda claimed and what it really had was utterly
>> astounding!!!!
>>
>> Regards, Greg
>
>>From what I remember working at an AMC / Mazda dealership back when the
>RX3 was brand new, it had the same displacement as a 258cu in AMC
>engine, and used about 20% more fuel to deliver about 10% more power.
>
>When peoplecomplained it burned a lot of gas I asked compared to what? A
>304 Gremi was about the same.
>--
>                               _/\_
>                       --|-----([])-----|--
>                         S    0/  \0    B
>
>                 Looks like we've finally fixed it!!!
>                I am still clare.snyder.on.ca at ibm.net
>                 Snyder.on.ca is BACK ON THE NET!!!
>        With any luck, I will be Clare at snyder.on.ca real soon!!!
>
>                           Clare Snyder
>                         Waterloo, Ontario

Hi Clare--

Lemmesee-- 1 liter= 61 cubic inches, so 258 cubic inches = 4.23 liters.
Either both of our memory banks have been subjected to the same emi, or
maybe we might both just be right (see numbers above). Anybody wanna bet a
case of fifths of Balvenie (or even just one fifth?) that a two rotor RX-3
made four power strokes per output (eccentric) shaft revolution??

These things do pack an insane amount of swept displacement into a tiny package.

Regards, Greg