Paul,
I have supplied an attachment, which I have developed for my own use,
it's not perfect as there are variations in different motors, however I
was wondering if it was of any benefit for others.
George (down under)

George,

Good on ya mate. I was just considering doing something similar in EXCEL
but visually your graph is easier to comprehend.  I assume P-ports here
and 6,000 rpms.  For every rpm you need another graph.

Cheers

Doug

Thanks Doug,
See any major errors - mind you it's rounded to the nearest 10 deg and
designed to orientate visually. I should have done this years ago.
Anyhow it's work in progress and here's an update, mind you it does look
better in Autocad.
Yes, I'm concentrating on 6,000 rpm but the events are the same but as you
say the speed is different for injection and spark. Mind you I don't know
what the timing for spark is for 6,000 rpm so I put in the static timing
marks - again just for orientation.
If you can follow this for cruise 6,000 rpm you can work out other RPM.
It would look better as a continuous line but the numbers diminish in size -
this way I get most of it on one page.
I also did it for 2 rotors, just to visually see what was happening
simultaneously.
George (down under)

George,


I've look at your chart more than a the first glance and I noticed that
your timing seems to contradict what Paul has stated.  Namely the intake
port is open 270 degrees.  I guess we have to define 'open'  partial
or fully open and closed.   Your graph shows that the a leading apex
seal (call it B seal) arrives at a the same location  (IO) 360 degrees
after 'A' apex seal passed this location.   Is this correct?  If the
statement,  "The rotor rotates at 1/3 rate as the e-shaft" then the
time and rpm must correlate to 10ms at 6000 rpm.


Doug in Japan.


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