X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet3.per.eftel.com ([203.24.100.44] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4493298 for flyrotary@lancaironline.net; Tue, 05 Oct 2010 00:51:35 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.44; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (mail.aanet.com.au [203.24.100.34]) by poplet3.per.eftel.com (Postfix) with ESMTP id 9084E37CE8 for ; Tue, 5 Oct 2010 12:50:58 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 3BD63C5D43 for ; Tue, 5 Oct 2010 12:50:58 +0800 (WST) Message-ID: <7B9038B7BC5D401ABC7C6FBB61269ECA@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Sam Hodges Prop area comparison Date: Tue, 5 Oct 2010 14:51:03 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0015_01CB649C.BB4DE070" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 X-Antivirus: avast! (VPS 101004-1, 10/05/2010), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0015_01CB649C.BB4DE070 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Doug, What does a 76" leave as clearance - 6"? What is the 3 blade clearance? What is recommended ( in the real world) in tricycle and tail dragger? George (down under) Ed Wrote: "When He put my 74x88 Performance Prop on he got as high as 6100 rpm = one time but each time got at least 6000 rpm...". Sam's prop actually measured 76 inches long (if I remember right) = which is quite a bit longer than I would want to run on a nose gear = equipped RV. A 76" prop leaves very little clearance off the ground and = will undoubtedly result in a considerable amount of blade tip erosion = over time. =20 If my IVO prop doesn't really work out I think I will give the CATO 3 = blade version a try since there are quite a few RVers flying it and it = will get the tips off the ground a bit more...at a cost of a couple = knots of top end of course! Doug Lomheim RV-9A, FWF / Canopy=20 OK City ------=_NextPart_000_0015_01CB649C.BB4DE070 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Doug,

What does a 76" leave as clearance - = 6"?

What is the 3 blade = clearance?

What is recommended ( in the real = world) in=20 tricycle and tail dragger?

George (down under)

Ed Wrote:

"When He put my 74x88 Performance Prop on he got as high as = 6100=20 rpm one time but each time got at least 6000 rpm...".

Sam's prop actually measured 76 inches long (if I remember = right)=20 which is quite a bit longer than I would want to run on a nose gear = equipped=20 RV. A 76" prop leaves very little clearance = off the=20 ground and will undoubtedly result in a considerable amount = of=20 blade tip erosion over time.

If my IVO prop doesn't really work out I think I will give=20 the CATO 3 blade version a try since there are quite a = few=20 RVers flying it and it will get the tips off the ground a bit = more...at a=20 cost of a couple knots of top end of course!

Doug Lomheim

RV-9A, FWF / Canopy

OK = City

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