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X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail28.syd.optusnet.com.au ([211.29.133.169] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTPS id 1008530 for flyrotary@lancaironline.net; Tue, 21 Jun 2005 01:37:02 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.169; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-0-190.dsl.nsw.optusnet.com.au [220.236.0.190]) by mail28.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j5L5aBKf031077 for ; Tue, 21 Jun 2005 15:36:12 +1000 Message-ID: <003401c57623$267dd1c0$be00ecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Single PP HP? Date: Tue, 21 Jun 2005 15:36:18 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0031_01C57676.F7E07CB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0031_01C57676.F7E07CB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty, I've made an appointment to see my contacts machinist mate, who also = does the dynoing, so we can have time to discuss al these issues. The 38mm is for dirt racing not track, he suggested this was the best = all round size, but has a hesitation at around 4,000 to 4,500, which he is yet to identify the cause. He has done the full range of P-ports for all classes of racing i.e. 38 = to 50+mm. Actually the chap I initially talked to works for a Mazda dealership and = his racing has been sponsored by the dealership (I suspect) - this is = his machinist. =20 MY PSRU is not dissimilar to Tracy's in regard to using the 2.85 Ford = E4OD Planetary. Just differently configured, but then again I'm led to = believe that Tracy has changed the design for the 2.85. I personally = prefer different bearings. I don't plan on going over 7,500. Someone mentioned to me Tracy didn't exceed 7,200 on take-off, with the = 2.85. I hoping for 115 to 125hp at 7,500 rpm, I think that's achievable! George ( down under) I just had a meeting with a chap in the racing game who specialises in = P-port - do you know what size he recommends for all round performance, = you guessed it 38mm ( 1.5"). Now Jerry will be glad to hear this! Hi George, Is this guy limited to 38mm for some racing rules, or does he just = think that's best? Since he's building race engines, with the size = ports that are being theorized as optimum, can you post some dyno runs = of one of his engines? I still think it would be interesting to see how = the PP compares to a conventional street port REW in the 7000-7500 range = that we're interested in. I'm sure we could get dyno reports from Lynn = or Leon from various bridge ports, and street ports for comparison. =20 How much HP do you expect to get from your PP Renesis, and at what = RPM? Since you're making your own gear drive, are you planning to try = to get a higher ratio, to take advantage of the PP? =20 Cheers, Rusty (got several housings, but not convinced I should punch extra = holes in them) ------=_NextPart_000_0031_01C57676.F7E07CB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

Rusty,

I've made an appointment to see my = contacts=20 machinist mate, who also does the dynoing, so we can have time to = discuss=20 al these issues.

The 38mm is for dirt racing not track, = he suggested=20 this was the best all round size, but has a hesitation at around 4,000 = to=20 4,500,

which he is yet to identify the = cause.

He has done the full range of = P-ports for all=20 classes of racing i.e. 38 to 50+mm.

Actually the chap I initially talked to = works for a=20 Mazda dealership and his racing has been sponsored by the = dealership=20 (I suspect) - this is his machinist.

MY PSRU is not dissimilar to Tracy's in = regard to=20 using the 2.85 Ford E4OD Planetary. Just differently configured, but = then again=20 I'm led to believe that Tracy has changed the design for the 2.85. I = personally=20 prefer different bearings. I don't = plan on going=20 over 7,500.

Someone mentioned to me Tracy didn't = exceed 7,200=20 on take-off, with the 2.85.

I hoping for 115 to 125hp at 7,500 rpm, = I think=20 that's achievable!

George ( down under)

I just had a meeting with a chap in = the racing=20 game who specialises in P-port - do you know what size he recommends = for all=20 round performance, you guessed it 38mm ( 1.5"). Now Jerry will be glad = to hear=20 this!

Hi=20 George,

Is this guy=20 limited to 38mm for some racing rules, or does he just think = that's=20 best? Since he's building race engines, with the size ports that = are=20 being theorized as optimum, can you post some dyno runs of one of his=20 engines? I still think it would be interesting to see how the PP = compares to a conventional street port REW in the 7000-7500 range that = we're=20 interested in. I'm sure we could get dyno reports from Lynn or = Leon from=20 various bridge ports, and street ports for=20 comparison.

How=20 much HP do you expect to get from your PP Renesis, and at what = RPM? =20 Since you're making your own gear drive, are you planning to try = to get a=20 higher ratio, to take advantage of the = PP?

Cheers,

Rusty (got=20 several housings, but not convinced I should punch extra holes in=20 them)

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