Paul,

 I'm starting to model a rotary in my spare time, and I am in need of
 some accurate dimensions for the 13B and/or RENESIS engine. I've
 drawn the trochoidal housing and rotor shapes from Yamamoto's
 equations and numbers published in his book, but I don't have an
 example around that I can measure for the other dimensions.

 What I need mostly at this point are critical dimensions like rotor
 housing depth, center housing depth, thickness of the rotor housing
 wear surfaces, locations/spacing of the tension bolt holes, major
 e-shaft dimensions, stationary gear height and diameters, and so
 on...

 My purpose is to design new housings and possibly rotors that can be
 used with the mazda e-shaft, gears, bearings, etc.


 I've seen pictures of your models... are they detailed to this
 level, or are they mostly just for mock up?


 Josh

 I have a iges of a rotor housing. Can your email handle a zip file?

 Paul Lamar


 Yes, zip is just fine.

 Josh


 Here it is.

 Paul Lamar


Hey Paul,

If you rename the zip file thus:

rotor_housing2-igs.zip
rotor_housing2-igs.piz

it will not be filtered out by email agents that filter out zip files.
When your correspondent receives the file all they need to do is rename
the file from piz to zip again.

Windows is too stupid to know that the file is a zip file if you change
the file extension.  Just make sure that you explain what you've done to
your recipients so they know they have to rename the file.

-  Mark LaPierre
-The book by Dante Giacosa, many years head engineer in Fiat, entitled:
'Internal Combustion Engines',
('Motores endotermicos' in its Spanish translation -'Endothermic
engines') contains also equations for
the design of epitrochoid and other features of Wankel Rotary Engines,
but as I lost any contact with
equations around 1969, I can't tell if the equations of D Giacosa and
those of Kenichi Yamamoto are the same.

Fiat seems not having been a lover of Wankel design, but Alfa-Romeo,
now part of the Fiat-Daimler
conglomerate, did buy a Wankel license and probably conducted some
research on it, I'm not aware of
publications of the Alfa-Romeo research on RCEs, perhaps the Wikipedia
in Italian language articles about
Fiat, Alfa-Romeo, and RCEs may contain some info about the work done
by Italians on this.
Thanks, regards, salut +

  Jose Gros-Aymerich



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