I did a little more work on the 3D's with a paint program.
I think this is a solution to the slightly worse fuel consumption.
It should make the rotary equal to the piston engine on fuel
burn, In a way this simulates the piston engine in the way it
compresses the incoming charge.

Paul Lamar


Paul,

At Norton we did similar work but we used brake pipes in a crossover
configuration from
the side walls of the end plates, on our twin rotor machine. We was
trying to improve the idle.

We for over a two decade also used butterfly's mounted within the
housing, we PTFT?? coated
the S.U butterfly due to them and the throttle jamming closed when the
housing contracted on cooling.

Bob Rowley.

The butterflies have that problem. You need slop in there and then they
leak when closed.

That is interesting. Did the brake pipes work? The main reason Mazda
went with side exhaust ports was to improve
the idle. Every time it missed  you got a dollop of unburned
hydrocarbons. It was normal for
earlier RX's to miss every once in a while at idle.

Paul Lamar




Paul,
  The Crossover pipes showed some improvement on tick over, but we did
not have the benefit of computer models to any great extent even in 1983
( these test dates ).


  We put closing valves on the later test so we could check with or without.
  We only set the drill zones for the pipe on a sort of best guess
fashion, the pipes could be switched to the other rotor, or switched to
itself.


  Please see attached a typical MIRA test day for me, please state
"Rowley Archives"
  You may wish to Know that we shipped a Norton to HD  in and I spent 3
week in a sort of
exchange riding HD and HD testers riding the Norton (circa 1987)
  Regards


Bob Rowley

"Rowley Archives" attached.

Up untill the advent of CFD we had no idea what the air was doing inside
the rotary.
Better CFD is the key to improving the fuel consumption.

What does HD stand for Bob? Is that Harley Davidson? :-)

I sold them some road test systems before 1987.

Paul Lamar


Hi: thanks for the good information. For sure you're aware that the
Norton two rotor engines,

294 cc per chamber, had only one rotor firing at idle, the other just pumping air.

Thanks, have a good season, best regards, + Salud

Jose Gros-Aymerich

Madrid, Spain


Yes Paul Harley

Bob Rowley

Here are some pictures at the Harley test track in Alabama.

Small world.

Paul Lamar

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