Return-Path: Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 791652 for flyrotary@lancaironline.net; Sun, 13 Mar 2005 16:48:50 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=sqpilot@bellsouth.net Received: from paul52u7f5qyav ([209.214.44.49]) by imf20aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with SMTP id <20050313214803.SHMJ1995.imf20aec.mail.bellsouth.net@paul52u7f5qyav> for ; Sun, 13 Mar 2005 16:48:03 -0500 Message-ID: <00b401c52816$4cca6010$032dd6d1@paul52u7f5qyav> From: "Paul" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: peripheral ports Date: Sun, 13 Mar 2005 15:47:45 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00B1_01C527E3.FFBCF440" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_00B1_01C527E3.FFBCF440 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 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=20 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. =20 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. =20 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. =20 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. =20 Cheers, Rusty=20 =20 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.=20 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 -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.7.2 - Release Date: 3/11/2005 ------=_NextPart_000_00B1_01C527E3.FFBCF440 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Sunday, March 13, 2005 = 12:56=20 PM
Subject: [FlyRotary] Re: = peripheral=20 ports

Thanks, Richard....I may just = order the=20 Racing Beat lightweight aluminum housings. They are available = unported, stock=20 ported or street ported, etc.  Paul Conner 
 
Good luck.  The rear and intermediate = housings have=20 been available for quite some time, but the front = housing has=20 been "almost ready" for a couple years now.  The last time I=20 talked to them was January, and I got the same=20 story.  
 
BTW, when you call them, ask how they = feel=20 about peripheral ports in aircraft use, and you may forget the = whole=20 thing.  Using the PP for aircraft can certainly be done, but = there's=20 no slam dunk recipe for it at the moment, unless you want to buy=20 a Powerports engine.  At the moment, there are some = good=20 projects going on, but until they get to the point of flying, and = providing=20 real world data, it's far from a sure thing. =20
 
There's also considerable doubt whether = a good PP=20 engine can actually out produce a good side port (ported REW housings) = engine=20 in the rpm's we're running.  I'd be willing to bet that the side = port=20 will be more civilized across the rpm range=20 too.  
 
Don't take this wrong.  I desperately = want to=20 see some of these project get completed, and I hope it's a great as = they think=20 it will be.  Just can't say for sure until it actually = happens. =20
 
Cheers,
Rusty
   

I have been giving this a lot = of thought,=20 also, Rusty.   Most articles I read about the PPorts talk = about the=20 engine not idling (or even running) below 2000 rpm's.  That is = 1000 prop=20 rpm's for me....I would float too much once in ground effect.  = Also, it=20 appears that the PPorts seem to give the most advantage at rpm's much = higher=20 than I intend to operate at.  Especially with a 2.17:1 PRSU, I = need to=20 get my power around 6000 rpm's so that the prop tips do not go = supersonic,=20 etc.
     = Sounding like the=20 street ported 4-port housings I already purchased might be my best = option=20 after all.  I've read that the street port gives a boost to top = end power=20 without sacrificing idle or transition speeds, and a low, = dependable idle=20 is a nice thing to have on short final.  Harder to go around once = the=20 engine quits.  Paul Conner

No virus found in this incoming message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.308 / Virus Database: 266.7.2 - Release = Date:=20 3/11/2005
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