X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf18aec.mail.bellsouth.net ([205.152.59.66] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 925541 for flyrotary@lancaironline.net; Fri, 13 Jan 2006 13:45:52 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.66; envelope-from=sladerj@bellsouth.net Received: from ibm61aec.bellsouth.net ([72.144.102.32]) by imf18aec.mail.bellsouth.net with ESMTP id <20060113184508.MBZE6864.imf18aec.mail.bellsouth.net@ibm61aec.bellsouth.net> for ; Fri, 13 Jan 2006 13:45:08 -0500 Received: from JSLADE ([72.144.102.32]) by ibm61aec.bellsouth.net with ESMTP id <20060113184507.YONF29167.ibm61aec.bellsouth.net@JSLADE> for ; Fri, 13 Jan 2006 13:45:07 -0500 From: "John Slade" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Props Date: Fri, 13 Jan 2006 13:47:02 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0B1A_01C61847.D56EA260" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_0B1A_01C61847.D56EA260 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Jim, Where did the 2700 max prop rpm number come form? That's 5860 engine rpm for me. I'm expecting to be able to go higher than this - say 2950 John Talked with IVO and 190-200HP, 2650-2700 max prop rpm, with 200+mph cruise was feasible with 68" 3 blade on a Cozy MKIV. The magnum 45 to 105 pitch adjustable. This puts the engine at 7500rpm max. Does this provide a workable solution for a N/A 13B. Watching other IVO in flight adjustable setups to see what works. Jim Tracy Crook wrote: May work OK if you can use at LEAST 68" and have a 3 - 4 blade prop with LOTS of pitch. Talk to the prop makers for more precise requirements. They will need max prop rpm, top speed of AC, HP of eng, etc. Tracy ----- Original Message ----- From: Joe Berki To: Rotary motors in aircraft Sent: Friday, January 13, 2006 8:58 AM Subject: [FlyRotary] Props I have been watching the progress of those using the 2.85 PSRU with a large prop and was wondering how this combination could be made to work on a canard pusher. I am thinking of going with a P port engine so the 2.85 ratio would work, but i don't think the AC can handle a long prop due to ground clearance and rotation. Any thoughts? Thanks for any help. Joe Berki Limo EZ Sanding ------=_NextPart_000_0B1A_01C61847.D56EA260 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Jim,

Where=20 did the 2700 max prop rpm number come form?

That's=20 5860 engine rpm for me. I'm expecting to be able to go higher than this = - say=20 2950

John

Talked with = IVO and=20 190-200HP, 2650-2700 max prop rpm, with 200+mph cruise was = feasible with=20 68" 3 blade on a Cozy MKIV. The magnum 45 to 105 pitch = adjustable. This=20 puts the engine at 7500rpm max. Does this provide a workable = solution=20 for a N/A 13B. Watching other IVO in flight adjustable setups = to see=20 what works.

Jim

Tracy Crook wrote:

May work OK if you can use at LEAST 68" and have a 3 - 4 blade = prop=20 with LOTS of pitch. Talk to the prop makers for more precise=20 requirements. They will need max prop rpm, top speed of AC, HP = of eng,=20 etc.

Tracy

-----=20 Original Message -----
From:=20 Joe Berki To:=20 Rotary motors in = aircraft=20 Sent:=20 Friday, January 13, 2006 8:58 AM Subject:=20 [FlyRotary] Props

I have been watching the progress = of those=20 using the 2.85 PSRU with a large prop and was wondering how this=20 combination could be made to work on a canard pusher. I am = thinking=20 of going with a P port engine so the 2.85 ratio would work, but i = don't=20 think the AC can handle a long prop due to ground clearance and=20 rotation. Any thoughts? Thanks for any = help.

Joe Berki

Limo EZ

Sanding

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