Hallo Paul,

I have found three photos of the 1970 version of the Mercedes-Benz /
Daimler-Benz 4 rotor engine as used in the C111 sports car.
At Daimler there were some very enthusiastic developer, for example
Bensinger, Lamm ...

Development ended 1975 or 1978 (?). About the last versions there are no
publications. Finally they used 2 spark plugs per chamber + injection into
the intake channel.

I think, in you can find a lot of english written informations in the
"endless world of the internet". Patent US 3398724A shows an early version
of the rotor recess layout - the pointed out, that you should concentrate
the mixture around the spark plug (relatively deep recess) + in the
direction of rotation + that you need some vortex / tumple / swirl or
something like that ...

Perhaps is the AVL range extender RE the continuation of the Mercedes
development. The next days I will send you a little bit about that small +
beautiful engine ...


With kindest regards

Frank (Herfert)

Great pictures Frank. Thanks.

Paul Lamar


Thank you Paul and Frank, indeed great pictures

This confirms what Gerhard mentioned to me yesterday. Essentially he said Mercedes-Benz went away with the spark plugs on both sides of the TDC low point and initially went with both plugs close to one another on only one side of the cavity at TDC. After further testing they deleted the second plug as there was little benefit and made it more complicated to control. He has a really good memory since this happened over 40 years ago and he has been removed from this industry for decades

Regards,

Simon Saba

Here are some pictures from the Rotary museum in Germany.

Paul Lamar


The Rotary Engine free News Letter. Powered by Linux. If you want off
the list PLEASE let me know and I will remove  you.  ACRE NL web
site. http://www.rotaryeng.net You Tube http://tinyurl.com/beqqxas
Copyright 1998-2016 All world wide rights reserved.