Hi!: in a fast overview of your list of Rotary Combustion Engines, I
miss the Sachs KC 24 (or KC 27?), the one installed in the DKW /
Hercules W-2000 motorcycle, that is slightly different to the one
installed in Snowmobiles, data about this engine can be found in
www.der-wankelmotor.de ; from the motorcycle technical data page, I know
that it gave 26 HP (19.1 kW) at 6000 rpm, with a torque of 3.5 mkg at
4500 rpm, from a single rotor with a displacement of 294 cc per chamber,
a compression ratio of 8.5:1; fuel: Mix Oil/ 87 ON Gasoline 1:25, and
ignition at 2º after tdc at arrest, and 16º before above 2700 rpm, the
article by R Nikulski indicates the changes needed in carburetor jets
and in ignition timing to work properly with the Norton 9.5:1
compression rotor; as you know, the Google translator gives acceptable
automatic translations from German or any other language into English,
it seems that translations to other languages have an intermediate stop
in English, then changed into the third language, and translations to
languages other than English are not of the same quality.
Regarding other engines, I've added some references in
www.aaroncake.net section Rx7 forum, General Stuff, two discussions
opened, one about installing a Wankel engine in an AMC Pacer, and the
other about "Reed-valve controlled, peripheral intake port Wankel
engine", under the user name "urquiola", reference numbers of patents o
free access and download from ESPACENET are listed there.
By the way: are yoy aware of somebody offering for sale a good condition
Mazda 12A RCE? If yeah, you can give him/her my e-mail address in order
to contact me and discuss the subject, if you don't mind, please give me
a helping hand in this.
Long time ago, I started considering installing a Sachs KC 27 engine in
a Citroen Ami 8 clutch and gearbox system, as you know, the Series A
Citroen cars had a forced air cooled, twin flat engine, the last ones of
602 cc total displacement, then a slightly different one of 650 cc total
displacement, both the Sachs RCE and the Citroen engine have a similar
power output, both are air cooled, and both turn in the same direction.
As of today I've been unable to find a person or team wanting to
consider this transformation and issuing a budget.
In order to this, I contacted some Wankel experts, herr Reiner
Nikulski, from the German Wankel club, was specially kind and send me a
sketch on how to balance the KC 24 after installing a high compression
ratio, LDR recess, Norton rotor in the engine, he gave me also a permit
to spread in any way I wanted to the articles in German he published in
"Wankel news", I've prepared translations of his articles about the KC
24 engine, one with his results with the Norton rotor, that as is
heavier than the original Sachs rotor mandates a dynamic balancing of
the engine, he claims, and shows results, having gained 2-4 HP with the
Norton rotor, and a reduction in fuel use of the byke of 1 liter every
100 km or more, this is very good result for such a small engine, going
down from 6'5 lit / 100 km to 5 lit / 100 km, the other article contains
data regarding the use of an exhaust gas catalyst to reduce emissions in
the Sachs KC 24 engine.
If you like looking at it, I've added some data in the Wikipedia article
about Wankel RCE and in the one about Sleeve-Valve engines.
It's my pleasure, if I find the way to do it, sending you all the
information and articles about improvements in the Sachs engine I got
from R Nikulski, and the translations I prepared., you're free to do any
use of it, but if some cents came from, please let me know.
Thank you for your kind attention, have a nice year 2013, best regards,
congratulations for you work, salut +
Jose Gros-Aymerich, MD
E-28033 Madrid, Spain
