Namely the intake
port is open 270 degrees.  I guess we have to define 'open'  partial
or fully open and closed.   Doug in Japan.

Hi Doug and George,
I am having trouble seeing a P port ever being closed.
The only event I see is an apex seal passing over the port, a rotor
face moving away with a full charge and a new rotor face being exposed
to the incoming charge.
Maybe a pulse as the flow changes in velocity but no real interruption
of flow or port closing per se; is this not why the VE is so high with
PPs?
This is not the case in a side port, where the passing rotor side wall
closes off the port for a portion of the cycle.
 How do you see it?
Dave McCandless

Dave your correct!
Which  brings up a point of how the p-port is tunable, or from what point do
we calculate the wave that rides down the inlet tube, reverses, and travels
back to chamber.
I tend to think it's the IO fully opened ( no bleed-off to previous rotor
face).  However I would like an expert to confirm this is the case or not.
BTW my calculations are wrong in the graph it's not 1 ms, it's 2,001 ms or
72 deg  . You can play with that number in the chart to see different
outcomes / advantages.

If you were to start the 'fuel in' fase at 'IO fully' (ignoring the exhaust
port faze) you would see the reversed sound wave supporting the fuel
commencement faze ( 72 deg of 80 deg to 160 deg) and finishing at the 'IC
start' faze ( 270 deg) and before the reduction of max volume.

I don't know what's the best approach - it's either one or the other.
I know Tracy favours what's in this graph for fuel injection, as the 70 deg
of volume reducing is only minor back pressure. I will show theses pressures
in the new graph I am working on. I think it 49 psi at the 'IC fully' mark
at 80 deg.
George ( down under)

For the amount of time you are thinking about it you can buy a pressure sensor
and record it in real time using a computer.

Paul Lamar

Paul,
What would be nice is a computerized  graph and graphic model of the rotary,
showing events  at different rpm - which is adjustable for different
configurations. That's not likely to happen soon. Is there anyone in the
group with these skills?

It would seem the deeper I get into this the more I become confused, but it
will all be sorted eventually.
George ( down under)


The rotary is very subtle. One can think he knows how it works but
then one finds out something new about it that one did not know before.

One of the finest explanations of the rotary every done is one of the oldest.
I found it in Germany at the Altrusheim museum.

Here it is in English. http://www.youtube.com/watch?v=9iiiDcFH-IM

Watch it over and over again until the light lights :)

Paul Lamar

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