The problem is that the eccentric shaft (i.e. crankshaft) doesn't turn once
per rotor revolution, it's geared up, so one full rotation of a rotor is
more than one rpm. I seem to remember that a 2 rotor rotary gives the same
number of power pulses as a 6 cylinder.
----
John Steczkowski
Director, Server I/O
Crossroads Systems, Inc.
512-794-2742
> -----Original Message-----
> From: Erik Van-der-Mey [mailto:erik@webcentrix.net]
> Sent: Thursday, July 15, 1999 9:41 AM
> To: autox@autox.team.net
> Subject: Re: Revised STU Proposed Rules - Plan of attack
>
>
> 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
> Think Different, Serve Different...
>
> ***** FET CATZ Fog and Driving Lights - http://foglights.com *****
>
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