X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from outbound-mail.dca.untd.com ([64.136.47.15] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with SMTP id 3758430 for flyrotary@lancaironline.net; Wed, 15 Jul 2009 09:05:15 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.47.15; envelope-from=alwick@juno.com Received: from Penny (c-98-246-117-71.hsd1.or.comcast.net [98.246.117.71]) by smtpout02.dca.untd.com with SMTP id AABFF5W7HAPM4WU2 for (sender ); Wed, 15 Jul 2009 06:03:35 -0700 (PDT) Message-ID: <42FDF3A2596E4285B2D8D08966A370F1@Penny> From: "Al Wick" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Belt life Date: Wed, 15 Jul 2009 06:03:29 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00BC_01CA0511.F9CBB3E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18005 X-MIMEOLE: Produced By Microsoft MimeOLE V6.0.6002.18005 X-ContentStamp: 8:4:1424439054 X-MAIL-INFO:4f848159d0a951f9a4b4d1d06d4431542d356db99989ddb58d70b4404125391534ed3414b01145745d7db5d9c1c19d040125c0a1714d X-UNTD-OriginStamp: L941HVjjYzDhN3itp//mkBEABfq5FZK15XWpGfT1EeuYILN2sCRqAg== X-UNTD-Peer-Info: 10.171.42.32|smtpout02.dca.untd.com|smtpout02.dca.untd.com|alwick@juno.com This is a multi-part message in MIME format. ------=_NextPart_000_00BC_01CA0511.F9CBB3E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Excellent suggestion Lynn. In my opinion very likely that is the = problem. Perhaps room for idler to increase belt wrap? -al wick ----- Original Message -----=20 From: Lynn Hanover=20 To: Rotary motors in aircraft=20 Sent: Wednesday, July 15, 2009 5:52 AM Subject: [FlyRotary] Belt life It may be the case that the alternator as installed is of a higher = output than the one that came on the chassis the motor home is built on. = So, let us suppose that it is the case, and now the single sheave pulley = is no longer adequate, and a two sheave pulley is required. Also, it is = possible that the layout does not provide as much wrap (contact area) = for the belt(s) as is required and is just overheating them. =20 So, add a sheave, and increase the pulley size about 30% for more wrap = and lower belt stress (bending angle) and tensile load. No more = problems.=20 Lynn E. Hanover ------=_NextPart_000_00BC_01CA0511.F9CBB3E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Excellent suggestion Lynn. In my = opinion very=20 likely that is the problem. Perhaps room for idler to increase belt=20 wrap?
 
-al wick
----- Original Message -----
From:=20 Lynn=20 Hanover
Sent: Wednesday, July 15, 2009 = 5:52=20 AM
Subject: [FlyRotary] Belt = life

It may be the case that the alternator as installed is of a = higher=20 output than the one that came on the chassis the motor home is built = on.=20 So, let us suppose that it is the case, and now the single sheave = pulley=20 is no longer adequate, and a two sheave pulley is required. Also, it = is=20 possible that the layout does not provide as much wrap (contact area) = for the=20 belt(s) as is required and is just overheating them.  
 
So, add a sheave, and increase the pulley size about 30% for more = wrap=20 and lower belt stress (bending angle) and tensile load. No more=20 problems. 
 
Lynn E. Hanover
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