X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 07 May 2012 07:51:20 -0400 Message-ID: X-Original-Return-Path: Received: from qmta02.emeryville.ca.mail.comcast.net ([76.96.30.24] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5523330 for lml@lancaironline.net; Fri, 04 May 2012 16:54:15 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.24; envelope-from=j.hafen@comcast.net Received: from omta06.emeryville.ca.mail.comcast.net ([76.96.30.51]) by qmta02.emeryville.ca.mail.comcast.net with comcast id 5wsw1j00216AWCUA2wthYv; Fri, 04 May 2012 20:53:41 +0000 Received: from Legent ([76.104.242.96]) by omta06.emeryville.ca.mail.comcast.net with comcast id 5wtc1j01n25W5K88Swtgkw; Fri, 04 May 2012 20:53:40 +0000 From: "John Hafen" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: MT composite prop X-Original-Date: Fri, 4 May 2012 13:53:40 -0700 X-Original-Message-ID: <007801cd2a37$fc7ab340$f57019c0$@comcast.net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0079_01CD29FD.501E2530" X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQC2T2iXYki9hpDYHPyygPsrh5kOC5jn0OEw Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0079_01CD29FD.501E2530 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit That is the most accurate non-biased information I have seen on this post in a long time. Thanks Pete! John Hafen IVP 413AJ 400 hours From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of pete@leapfrogventures.com Sent: Friday, May 04, 2012 1:23 PM To: lml@lancaironline.net Subject: [LML] Re: MT composite prop I think what they are referring to is that MT builds northern hemisphere props. Up north, the rain drops rotate clockwise as they fall due to the coriolis effect. This interacts with the counter clockwise motion of the prop (when viewed from the front) that effectively causes the raindrops to get pushed away from the grease seals on the hub. In the southern hemisphere, the raindrops rotate counterclockwise, which, unless the propeller was spinning in the opposite direction, get forced into the oil seals rather than away from them. The only answer if you want to fly IFR in the rain down under is to get an engine and prop that spin in the opposite direction so that they interact properly with your southern rain drops. Pete From: Stevens Family [mailto:stevens5@swiftdsl.com.au] Sent: Thursday, May 03, 2012 6:41 AM To: lml@lancaironline.net Subject: MT composite prop Another query for those out there who are already flying. I purchased a partly built L360 kit some time ago, which came with a 3 bladed, constant speed, MT, composite prop. It has never been assembled, and is by now about 20 years old. Now that I am getting closer to completing the project I have been speaking to a couple of propeller shops. As I intend to operate IFR, I asked about durability of the prop when operated in rain. The response has been a little confusing, with statements ranging from "they are not designed for ops in rain" to " they are approved for ops in rain, but nobody actually does so" to "they are fully designed to operate in rain and will be fine". I would appreciate any comments from those of you out there who have operated MT composite props, as to their suitability in rain. Thanks again for your input. Rob Stevens Perth, Western Australia ------=_NextPart_000_0079_01CD29FD.501E2530 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

That is the most accurate non-biased information = I have seen on this post in a long time. Thanks = Pete!

John = Hafen

IVP 413AJ 400 hours

From:= = Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = pete@leapfrogventures.com
Sent: Friday, May 04, 2012 1:23 = PM
To: lml@lancaironline.net
Subject: [LML] Re: MT = composite prop

I think what they are referring to is that MT = builds northern hemisphere props. Up north, the rain drops rotate = clockwise as they fall due to the coriolis effect. This interacts = with the counter clockwise motion of the prop (when viewed from the = front) that effectively causes the raindrops to get pushed away from the = grease seals on the hub. In the southern hemisphere, the raindrops = rotate counterclockwise, which, unless the propeller was spinning in the = opposite direction, get forced into the oil seals rather than away from = them. The only answer if you want to fly IFR in the rain down = under is to get an engine and prop that spin in the opposite direction = so that they interact properly with your southern rain = drops.

Pete

From:= = Stevens Family [mailto:stevens5@swiftd= sl.com.au]
Sent: Thursday, May 03, 2012 6:41 = AM
To: lml@lancaironline.net
Sub= ject: MT composite prop

Another query for those out there who are already = flying.

I purchased a partly built L360 kit some time ago, which = came with a 3 bladed, constant speed, MT, composite prop. It has never = been assembled, and is by now about 20 years old. Now that I am getting = closer to completing the project I have been speaking to a couple of = propeller shops. As I intend to operate IFR, I asked about durability of = the prop when operated in rain. The response has been a little = confusing, with statements ranging from “they are not designed for = ops in rain” to “ they are approved for ops in rain, but = nobody actually does so” to “they are fully designed to = operate in rain and will be fine”.

I would appreciate any comments = from those of you out there who have operated MT composite props, as to = their suitability in rain.

Thanks again for your = input.

Rob Stevens

Perth,

Western Australia

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