X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mailrelay.embarq.synacor.com ([208.47.184.3] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4491715 for flyrotary@lancaironline.net; Sun, 03 Oct 2010 21:38:26 -0400 Received-SPF: pass receiver=logan.com; client-ip=208.47.184.3; envelope-from=candtmallory@embarqmail.com Return-Path: DKIM-Signature: v=1; a=rsa-sha1; d=embarqmail.com; s=s012408; c=relaxed/simple; q=dns/txt; i=@embarqmail.com; t=1286156270; h=From:Subject:Date:To:MIME-Version:Content-Type; bh=5LERBiSImvtUWvDXP6pvh8UVncs=; b=YALzfGvwpj97A6U48PiC8s04BqxGCZx+U4osrwfICukFzUo2WQvxlyufSavvsySx kHNDEwHBJYnVhuY00T38qDLEA7Nq9pa7KT7cwvJkYFmIfX7DispZ7vRzv6nMpfUw; X-BINDING: X-Spam-Rating: None X_CMAE_Category: 0,0 Undefined,Undefined X-CNFS-Analysis: v=1.1 cv=uoKehd37+YucWcU9RMPIqPom7tfzHLStrhAPsLZyVtE= c=1 sm=0 a=WBndAYlVUgsA:10 a=jGa3PEj4gNbevsvxH5tqxQ==:17 a=Ia-xEzejAAAA:8 a=arxwEM4EAAAA:8 a=r1ClD_H3AAAA:8 a=SqQPZbf4dXZUgqv379oA:9 a=4b5ywxsgoAbUL66wn_3Ii0lJP_wA:4 a=CjuIK1q_8ugA:10 a=EzXvWhQp4_cA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=adH0npQT1AiH10taaYIA:9 a=0o6gIWOl3WxnwRhBy7YA:7 a=ISDCHbNcu5q8EBjj-_cvugFlGQoA:4 a=jGa3PEj4gNbevsvxH5tqxQ==:117 X-CM-Score: 0 X-Scanned-by: Cloudmark Authority Engine Authentication-Results: smtp02.embarq.synacor.com smtp.user=candtmallory@embarqmail.com; auth=pass (LOGIN) Received: from [76.5.160.103] ([76.5.160.103:22552] helo=AcerPC) by mailrelay.embarq.synacor.com (envelope-from ) (ecelerity 2.2.2.40 r(29895/29896)) with ESMTPA id CB/7D-25937-EEF29AC4; Sun, 03 Oct 2010 21:37:50 -0400 From: "Chris and Terria" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Sam Hodges Prop area Comparison Date: Sun, 3 Oct 2010 21:37:50 -0400 Message-ID: <005401cb6364$c1952e90$44bf8bb0$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0055_01CB6343.3A838E90" X-Mailer: Microsoft Office Outlook 12.0 Content-Language: en-us Thread-Index: ActjCciB8ZMGgPffTc6JJEeZ8k8KNwAWoDcA This is a multi-part message in MIME format. ------=_NextPart_000_0055_01CB6343.3A838E90 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Ed, I have the same Catto prop and mine is marked 76x88. I didn't get more than 5000 RPM max static either. To be honest, I didn't look at the max RPM while airborne, I was too busy looking at the temp, and I pulled the power back as soon as I could. I hope to fly again with the new radiator in a few weeks, and should be able to get new data. What were Sam's numbers Max static with the CATTO and with your prop? Thanks, Chris From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: Sunday, October 03, 2010 10:46 AM To: Rotary motors in aircraft Subject: [FlyRotary] Sam Hodges Prop area Comparison Just doing a rough back of the envelope calculation comparing Sam Hodges prop (8" cord) to my prop (5 1/2" cord) and assuming the two props blade profiles were similar, Sam's prop would have approx 45% more prop area trying to push the air back than my prop. Small wonder his engine was groaning trying to spin it up to 6000 rpm. Ed Edward L. Anderson Anderson Electronic Enterprises LLC 305 Reefton Road Weddington, NC 28104 http://www.andersonee.com http://www.eicommander.com ------=_NextPart_000_0055_01CB6343.3A838E90 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Ed,

I have the same Catto prop and mine is marked = 76x88. I didn’t get more than 5000 RPM max static either. To be honest, I = didn’t look at the max RPM while airborne, I was too busy looking at the temp, and I pulled = the power back as soon as I could. I hope to fly again with the new = radiator in a few weeks, and should be able to get new data. What were = Sam’s numbers Max static with the CATTO and with your prop?

Thanks,

Chris

From:= Rotary = motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed = Anderson
Sent: Sunday, October 03, 2010 10:46 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Sam Hodges Prop area = Comparison

Just doing a rough back of the envelope calculation comparing Sam Hodges prop = (8" cord) to my prop (5 1/2" cord) and assuming the two props blade = profiles were similar, Sam's prop would have approx 45% more prop area trying to = push the air back than my prop. Small wonder his engine was groaning = trying to spin it up to 6000 rpm.

Ed

Edward L. Anderson
Anderson Electronic Enterprises LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com=

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