At the present layout of the Rotary, the crankshaft rotates three times
rotor speed and the housing is stationary, in theory there is no load on
the 2:3 gearing between rotor and housing. ( in practis there is due to
vibrations).
Could gearing changes be made to reduce the e shaft to a (2/3*2.85) without
the psru (I.e. direct drive) or are the teeth too small (or big) etc...?
Kevin Lane
I am stunned Kevin. You are kidding right?
Well I guess you are not. I am amazed that people don't
understand why the ratio MUST be 3:1. I guess I take too much
for granted. Tim Kern, who writes for Kitplanes asked me a
similar question. The mis understanding of the rotary is more
widespread than I thought. Most explanations and mine in
particular gloss over these points.
It is a mandatory mathematical relationship for the definition
of a trochoid.
http://mathworld.wolfram.com/Trochoid.html
Here are some scans from Ansdale book showing what MUST happen
IF you change the ratio.
Paul Lamar ...No rotor no motor.
Maybe I can explain the communication problem.
It's a tough concept to see on paper. The fit between rotor and housing is
obvious, but the gearing from the rotor to the shaft is not so obvious.
I need to explain this to readers in about a hundred words -- no pictures of
rotating Reuleaux triangles in epitrochoid chambers, just words. Besides,
such pictures do not explain the gearing on the shaft.
I think the misunderstanding comes from the mistaken idea that the gears
transmit only rotation, without taking into consideration the eccentric
shape (and nature) of the shaft, and the geometrical relationship between
the shape of the rotor and the shape that must result on the crank. My
readers don't have the parts on their benches, to play with for hours or
years. They have to understand, right now, through words.
So, I repeat: can you help with such an explanation?
Thanks.
Tim Kern
Sure check out
http://www.rotaryeng.net/How-wankel-works3.txt
Paul Lamar ...No rotor no motor.
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