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


This got me thinking after the F1 pre combustion setup. Could that be used with an injector say at the leading edge spraying towards the rear and ignite it as the spray passes rearward. The hurricane is coming towards it that way and you would have the mix towards the front center of chamber if it could be timed right to complete the burn just as it reaches the rear seal avoiding fuel pooling up there.

Best regards

Kurt Emerson


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