2017.04.01

Hello Paul,

I've had a short look at my stack of papers. Enclosed is a zip archive with
some material ... ;-)

Patents ...
US 3.768.936 > Ramsey Corp., filed in 1971 > shows a different design, but I
think, it will not work very good ... (?)

US 8.597.006 > P+W, filed 2011 > new outline of apex seals ...

US 8.851.870 > P+W, filed in 2011 > modified layout of side + corner seals
..

The screenshots shall just direct your attention to the leakage mechanisms
on the rotor sides ... It seems to be important to get the side seals in
tight contact with their Inner grooves in the rotor - otherwise the
pressurized gas will flow "away" under the seals ...

Don't know, whether Rice Racing still offers their special corner seals -
have seen it in 2015 or 2016 ... > very "wild colored" web site ... ;-)

Of course, you can find a lot more patents + papers related to that theme
.. ;-)

The "motorbike_radial_engine" is just a joke - may be, it's hard to drive
around corners with it ... ;-)

Rotor with "basement" ...
It's pretty "hard" / difficult to imagine the real flows in a "2 plane
combustion chamber" w/o any help of CFD simulation - distribution of
temperatures + fuel + pressure ...
May be there is a flow backwards during compression (~ flushing ?) +
forwards when the leading section is growing ... ?
Unfortunately the main recess will be rather flat. Don't forget, that you
should offer as much space as possible to the growing flame kernel ...

Your "adding some air idea" is much easier to follow.
With a "flab" / reserve of air in the rear end you can probably "make the
squish flow your friend" ;-)
I think, it would generate less heat losses on the trailing side + prevent
the "gathering" of fuel / rich mixture near the trailing apex seal ...
The fast flow of air from the T section can "speed up" the combustion in the
L section - an effect a bit as with direct fuel injection, but without the
costs of such a system ...

Well, you see, I like the idea of "modelling with air" ... ;-)

To Jose: I don't know, what the "A2 Level" exactly stands for - I think it's
a value for "good" - so that's a lot better than my English ... ;-)

Now it's time to stop the small talk ... ;-)

With kindest regards

Franky / Frank Herfert

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