X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta09.emeryville.ca.mail.comcast.net ([76.96.30.96] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4493843 for flyrotary@lancaironline.net; Tue, 05 Oct 2010 11:10:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.96; envelope-from=hoursaway1@comcast.net Received: from omta24.emeryville.ca.mail.comcast.net ([76.96.30.92]) by qmta09.emeryville.ca.mail.comcast.net with comcast id F0eY1f0011zF43QA939TX7; Tue, 05 Oct 2010 15:09:27 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.26.137]) by omta24.emeryville.ca.mail.comcast.net with comcast id F39T1f0012xV6SL8k39TNl; Tue, 05 Oct 2010 15:09:27 +0000 Date: Tue, 5 Oct 2010 15:09:26 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <1647987168.243230.1286291366967.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: Subject: Re: [FlyRotary] Sam Hodges Prop area comparison MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_243229_939763645.1286291366966" X-Originating-IP: [208.254.22.50] X-Mailer: Zimbra 6.0.5_GA_2429.RHEL4 (ZimbraWebClient - IE7 (Win)/6.0.5_GA_2427.RHEL4) ------=_Part_243229_939763645.1286291366966 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Doug;=C2=A0 We have the Ivo Magnum 72" three blade elect. w/constant speed = module on RV6A 13B light weight rotors, turbo housings, Bruce Turrentein en= g., have not flown yet but are makeing great power, so far up to 5900 RPM s= tatic w/low pitch, tied to PU truck, am still learning about EC2 & EM2 tune= ing but very close to the good feeling of not being earthbound.=C2=A0 David= R. Cook Lansing MI.=20 ----- Original Message -----=20 From: DLOMHEIM@aol.com=20 To: "Rotary motors in aircraft" =20 Sent: Monday, October 4, 2010 11:57:59 PM=20 Subject: [FlyRotary] Sam Hodges Prop area comparison=20 Ed Wrote:=20 "When He put my 74x88 Performance Prop on he got as high as 6100 rpm one ti= me but each time got at least 6000 rpm...".=20 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.=C2= =A0=C2=A0A=C2=A076" prop=C2=A0leaves very little=C2=A0clearance off the gro= und=C2=A0and will=C2=A0undoubtedly result in a considerable amount of blade= =C2=A0tip erosion over time.=C2=A0=C2=A0=20 If my IVO prop doesn't really work out I think I will give the=C2=A0CATO=C2= =A03 blade version=C2=A0a try since there are quite a few RVers flying it a= nd it will get the tips off=C2=A0the ground a bit more...at a cost of a cou= ple knots of top end of course!=20 Doug Lomheim=20 RV-9A, FWF / Canopy=20 OK City=C2=A0=C2=A0 ------=_Part_243229_939763645.1286291366966 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit

Doug; We have the Ivo Magnum 72" three blade elect. w/constant speed module on RV6A 13B light weight rotors, turbo housings, Bruce Turrentein eng., have not flown yet but are makeing great power, so far up to 5900 RPM static w/low pitch, tied to PU truck, am still learning about EC2 & EM2 tuneing but very close to the good feeling of not being earthbound. David R. Cook Lansing MI.
----- Original Message -----
From: DLOMHEIM@aol.com
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, October 4, 2010 11:57:59 PM
Subject: [FlyRotary] Sam Hodges Prop area comparison

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.

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

OK City

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