At 5:11 PM -0400 7/14/99, Gemery@aol.com wrote:
>Pat MacAvoy wrote:
> >Also, you asked about rotaries... I think 2.5 is the factor used for
> >converting piston to rotary-equivalent displacement. For example,
> >my 1.3l rotary is similar to a (1.3x2.5) 3.25 liter piston motor.
> >I think this is based on the amount of airflow you get out of each type.
>
>No, 2x is the displacement factor for rotaries since they're
>two-cycle vs. the conventional 4-cycle motors the rest
>of us use. Therefore they get 2x power strokes per crankshaft
>revolution, thus 2x more power for same displacement.
>
>George Emery
>gemery@aol.com
>http://members.aol.com/gemery
Since the rotary lobe has three sides, isn't it more like 3 power
pulses per revolution per rotor?? (I had a visible wankel model as a
kid... trying to remember...)
And since a 4 cycle piston engine basically has one power pulse per 2
revolutions the factor would be more like 6x...
Just thinking out loud... (is there a rotary specialist in the house??)
--
Erik Van-der-Mey erik@webcentrix.net
WebCentrix http://webcentrix.net
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