----- Original Message -----
    From: Russell Duffy <mailto:13brv3@bellsouth.net>
    To: Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
    Sent: Sunday, March 13, 2005 12:56 PM
    Subject: [FlyRotary] Re: peripheral ports

    Thanks, Richard....I may just order the Racing Beat lightweight
    aluminum housings. They are available unported, stock ported or
    street ported, etc.  Paul Conner          Good luck.  The rear and intermediate housings have been available
    for quite some time, but the front housing has been "almost ready"
    for a couple years now.  The last time I talked to them was
    January, and I got the same story.           BTW, when you call them, ask how they feel about peripheral ports
    in aircraft use, and you may forget the whole thing.  Using the PP
    for aircraft can certainly be done, but there's no slam dunk
    recipe for it at the moment, unless you want to buy a Powerports
    engine.  At the moment, there are some good projects going on, but
    until they get to the point of flying, and providing real world
    data, it's far from a sure thing.          There's also considerable doubt whether a good PP engine can
    actually out produce a good side port (ported REW housings) engine
    in the rpm's we're running.  I'd be willing to bet that the side
    port will be more civilized across the rpm range too.           Don't take this wrong.  I desperately want to see some of these
    project get completed, and I hope it's a great as they think it
    will be.  Just can't say for sure until it actually happens.          Cheers,
    Rusty
       
    I have been giving this a lot of thought, also, Rusty.   Most
    articles I read about the PPorts talk about the engine not idling
    (or even running) below 2000 rpm's.  That is 1000 prop rpm's for
    me....I would float too much once in ground effect.  Also, it
    appears that the PPorts seem to give the most advantage at rpm's
    much higher than I intend to operate at.  Especially with a 2.17:1
    PRSU, I need to get my power around 6000 rpm's so that the prop
    tips do not go supersonic, etc.
         Sounding like the street ported 4-port housings I already
    purchased might be my best option after all.  I've read that the
    street port gives a boost to top end power without sacrificing
    idle or transition speeds, and a low, dependable idle is a nice
    thing to have on short final.  Harder to go around once the engine
    quits.  Paul Conner