In the CFD animation (anim_roto3.gif) it shows an offset
chamber/depresion in the rotor face. It reminds me of a NACA scoop.
This is suppose to create more torque during the expansion cycle. I
know this idea has been discussed but don't recall the merits.

Are you aware if anyone has tested this concept? Are you aware of
any testing Mazda may have done on offset combustion chamber in the
rotary engine?

Erik


Yes Mazda did some work on that as well as some others.

Download this paper from the web site.

http://www.rotaryeng.net/1984-recent-tech.pdf


BTW what does the crown in the apex seals have to do with early
ocean navigation?


Paul Lamar


Hi!: this is a subject I like; attached please find an article in
German by Reiner Nikulski, from the Wankel Club, about the results of
the Hercules W-2000 motorcycle Sachs KC-27 with the Norton high CR,
LDR recess rotor, plus English translation of it, previously send,
and also the references for SAE papers about combustion in RCEs, hope
it's useful for somebody. Have a good weekend. Best regards.

Jose Gros-Aymerich; Madrid, Spain

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*SAE paper 650723: 'New Rotating Combustion Power Plant
Development', C Jones, C-W. Points that gas leaks occur mainly in the
corner of apex seals, and for this, 3-piece seals may be better, the
problem previously discussed by P Lamar remains, differential wearing
of seal parts making possible that a seal piece enters working
chamber after some 200'000 miles


*SAE paper 720357: 'Combustion characteristics of Rotary Engines', K
Yamamoto et al, Mazda


*SAE paper 720468: 'A survey of C-W's 1958-1971 RCE Technological
Developments' C Jones, describes among other things that increasing
displacement of engine by increasing rotor width is feasible

*SAE paper 740160: 'REs -A Fuel and Lubricant Composition Study', Jh
du Jeu, B Brandone. Total

*SAE paper 830332: 'A Comprehensive Study of Wankel Engine
Performance', R Sierens et al, Universities  of Gent and Manchester

*SAE paper 890327: 'Investigation of Cyclic Combustion Variation in
RE' S Watanabe & Y Hamai,  Mazda 'Controlling 2-Stroke emissions', G
Bickle et al, Automotive Engineering International, Feb 2000, 27-32


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     Sorry, it seems that I forgot adding the English translation of article.
             Salut †           Jose Gros-Aymerich
                             Madrid, Spain



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