I forgot about this reference.  I located it again over the weekend.

http://www.mazdarotary.net/porting.htm


Charlie, you are rigorously correct in that I stated peripheral porting I overuse this term because this is what I read referenced in the rotary aviation use discussions.  If this reference is a sound technical reference I see no reason why anyone would want to use peripheral porting in aviation applications.  I realize there may be issues I do not yet understand but, engineering a "narrowband" engine does not appear to be useful for my aircraft application (a 4-place taildragger).  I suspect the "Extend" port to be a better choice for me yet, the "Mild" may also work.  Even with this, I do not care for the slight decrease in torque below 4000 rpm.  Has anyone ever seen any of these side ports referenced in aviation applications?

I saw Nel's response and looked at the www.rotapower.eu to locate information regarding the PSRU.  Unfortunately, I found nothing.  I know of Paul Moller and have for several years.  He has some good ideas but, I would like to see these come to fruition to a greater degree.  The need for funds gets in the way of accomplishments.

Rick