----- Original Message -----
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
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