The next run is today at 2PM

    The rough running is normal with a p-port. P-ports have a lot of
    valve overlap at speeds less than 4500 RPM.

    The smoke was probably caused by no restriction in the oil feed to
    the TC bearing. The oil pressure was 130 PSI.

    My mistake.

    Consensus from friends say there should be a .040" dia. restrict-or
    in there. So I made one on the lathe and put it in the fitting on top
    of the turbo charger bearing unit.

    That should cut most of the smoke.

    It has twice the power to weight ratio and half the size as the PT6
    powered Legend and that will climb at 6,500 feet per minute.

    From that point of view ours should climb at 13,000 feet per minute
    easily beating the Bear Cat record of 10,000 feet in a minute and a
    half.

    Here is a screen shot of the Motec EFI Data log. The Motec EFI
    records the data at 10 records per second. Think of it as a airline
    black box.

    The curious thing is the intake air temperature actually went down as
    the engine ran just above idle at 2300 RPM. Prop RPM was 760.

    The next test will be a full power run well tied down on the back of
    a flat bed tow truck at 45 degrees angle of attack to check all the
    pump functions.

    The video is low rez that is the only way to get the file size down
    to email.

    Here is the PT6 Legend taking off.

    Paul Lamar

    Valve overlap????????

    Your videos don’t open for me. What format are you sending? Thanks.
    John Dinkel

    That is because you are using an Apple John. Probably an old Apple
    :-)

    Here is todays run. We got it up to 3200 RPM. No smoke.

    We cleaned the normal plugs and it started on the first blade. Just
    like my RX8 does.

    Next step is put the wings on and run it at full power.

    This engine is half the weight and size of a PT6 engine so it will
    fit in a much smaller airplane that is half the weight of a PT6
    powered airplane.



    Paul Lamar


    Paul, Great job! Looking forward to seeing it flying. Pretty exciting
    project.

    Ray Hellstrom


    Thanks Ray.

    This has wide spread implications in the aircraft engine
    manufacturing community. The question is how long is it going to take
    before the market wakes up. Perhaps the time to climb record will
    help. As we are getting experience with this engine I am getting the
    impression a Reno racer version would not be all that hard to do.

    Paul Lamar


   Paul,  It sounds like some extra  caution may be in order today for you to avoid having to answer FAA inquiries about a flying flat bed tow truck. I love that you are doing the work to push the boundaries.  Good luck this afternoon.

    Now, when you have time to be contemplative, see if you can give me some reaction to this. Your 13,000 foot/minute rate of climb might beat that of the Bearcat and wake up the industry to the benefits of the Wankel.

   But, from the viewpoint of market acceptance I'd like to hear that your thinking might include keeping the benefit of your power/weight ratio in a very small and light engine scaled down in diameter to produce about 300 hp.

   Would not the slimmer design lighten the centrifugal load on main bearings and produce better heat dissipation?  I suppose what I'm suggesting would require a complete redesign...a new engine. And, I suppose the Mazda folks have been all through that.  But, the needs of young general aviation folks would be best served by the smaller but high producing engine.  Do you see anything like that coming? Dave.

   David Meier

   Not at all. This is a stock Mazda 132B engine mostly. The amount of power it puts out
   is strictly a function of the boost. The RPM pretty much is the same at all power
   levels. That is dictated by the gear box ratio and prop diameter.

   If you need a LSA engine a one rotor version with out the turbo would work.

   Paul Lamar




About 400 HP per rotor is the limit at this time. 300 HP per rotor is somewhat conservative, depending on the ports. A one rotor with turbo would be a fairly light 300 HP engine.
Dale Davies


    The Rotary Engine free News Letter. Powered by Linux. If you want
    off the list PLEASE let me know and I will remove you. ACRE NL web
    site. http://www.rotaryeng.net You Tube http://tinyurl.com/beqqxas
    Copyright 1998-2016 All world wide rights reserved.