Ed Anderson wrote:

Completed the first flight with the "Plastic Plenum" intake manifold.

The

plastic casting took the 1 1/2 hour flight without any obvious signs of
stress.

  SNIP

All appears good enough so I can fly to Slobovia Outernational for the
rotary flyin this Saturday.  Will get a better indication with some more
time on the induction system.  Regarding the [plastic] casting, short

term durability

appears adequate, but only time will determine the long term durability.

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com

Check your MPG carefully Ed. It should be affected one way or the other

but

perhaps difficult to measure.

Paul Lamar

Thanks for the suggestion, Paul

    The trip to Mississippi should give me an opportunity to do that.  I am
really interested in seeing what figures I get as all my "standards" are on
much cooler days - I avoid flying on the hot days where possible. It was
nice to see the top speed pick up, but I missed that extra rpm at launch.

    By the way, got the casting.  Plenty of material around the edges for
the holes on this batch.
Will save this one for the "final" manifold configuration.  Now that I
understand the short lengths it would take to use the "dynamic intake
effect" for the 5000 -6500 regime, sometime later this year, I am going to
cut some more tube to configure yet another intake.  I am looking at
physical configurations that will give 1/2 port to port distances of approx
13-15" for the primary and secondarys.  I intend to make it adjustable in
that range approx 1.5 - 2" for finally tunning.

I stuck the 91 turbo on the engine while I was messing with it and found
that it clears all components by a healthy margin with the exception of the
oil cooler.  The down pipe from the turbin exhaust would just hit the oil
cooler.  So, putting that on the back burner for a while.

I'll have a Bar B Q and beer for you at the flyin.

Thanks again

Ed Anderson

I won't be there this year. Too many commitments too little time. Going to Canada for my son's
wedding after OSH and then on to Mass for a friends birthday party.
we are also thinking of going to Japan and getting a tour through the Wankel 
factory. That depends on a few things. I am in touch with Mazda on that subject.

Been to Charlie's house and landed on his airstrip. It is great.  All you guys are going to have a fine time.

Paul Lamar
 
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