Wrathall Mark wrote:

 I was in Seattle on business last week and visited Brian Trubee again. His
 RV-4 is really coming along. Lots of progress in the last twelve months. You
 can really see the influence of the newletter in many of his design
 decisions. From the Engine mount, to the coolers under the engine. He has
 also used some novel insights to solve some of the challenges. Brians
 workmanship is very good, and it will be a lovely aircraft when finished.
 Good one Brian.

 While there Brian took me down to Hayes Rotary to meet Dennis, who took us
 on a quick tour of his shop. Nice guy. His collection of Rotary stuff is
 truly impressive. When I asked him if he could picture a PP tuned for 6000
 RPM, he immediately corrected me to 9000. I explained that 6000 is a sweet
 spot for the C6 gear ratio and props, but I sensed the street guys can't
 really get their heads around the desire for making power at only 6000rpm.
 He has an engine with combined side ports and valved PP, but hasn't had the
 time to run it. Dennis obviously believes this will make the Peripheral port
 more streetable. He said straight up he will not build an aviation 13B
 without 3mm Apex seals. He gave me a copy of a free drag magazine called
 Drag Sport. It has an articale in the rotary by Jim Mederer in it which has
 some good points on the differences in thermal stresses between the leading
 and training plugs.

 I also got to go up for a ride in a Lyco power RV-4. The only aircraft I
 have ever flown which approached the crisp handling and perfect control
 balance of the RV would be the AT-6 Texan (Harvard).

 Mark Wrathall

I thought it was so good I put a pic of Brian's RV4  on the ACRE NL web site.

Mark can you scan that article and upload it?

Paul Lamar

Car guys  associate P Ports with maximum performance.  I ran into the
same reaction about running a p port at 6000 rpm at Seven Stock.  In
fact, Jim Medereer, told me that P Ports were not appropriate for a
6000 rpm engine.   Luckily, we have the example of Power Sport to
prove otherwise.  I asked Jim what he thought about the  Power Sport
engine and he said he had not heard of it.   Jerry

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