X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-vw0-f52.google.com ([209.85.212.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTPS id 5081600 for flyrotary@lancaironline.net; Thu, 04 Aug 2011 08:12:04 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.212.52; envelope-from=david.staten@gmail.com Received: by vws16 with SMTP id 16so286780vws.25 for ; Thu, 04 Aug 2011 05:11:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type; bh=T0KMR3anYYUiPkpzRFM19NF6WNDgaV9U3ska4tBBjog=; b=VSexcma5UuUIjnqIaWl8Ewao+Q2sESAOEXc1LDtoYybSFe0Aos/3FT6zmCmbFaTMW8 Vqw3wmx7ivxMsZsMNIOykqkpKtvrlNNxD9qnkornOOProb5hiErfFrxl8Ft+vY89JhJy EIP795rhq6ZbjV9gVlQ5CqmE+USZ2P7dR7Chw= Received: by 10.52.173.239 with SMTP id bn15mr715810vdc.276.1312459887486; Thu, 04 Aug 2011 05:11:27 -0700 (PDT) Return-Path: Received: from [127.0.0.1] ([216.80.140.47]) by mx.google.com with ESMTPS id ez1sm859946vdb.30.2011.08.04.05.11.25 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 04 Aug 2011 05:11:26 -0700 (PDT) Message-ID: <4E3A8C6F.7080901@gmail.com> Date: Thu, 04 Aug 2011 07:11:27 -0500 From: Dave User-Agent: Mozilla/5.0 (Windows NT 6.0; rv:5.0) Gecko/20110624 Thunderbird/5.0 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Water pump pulley departed in-flight References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080700040804000300080408" This is a multi-part message in MIME format. --------------080700040804000300080408 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Glad to hear you landed safely, Jeff. Dave On 8/4/2011 6:59 AM, Jeff Whaley wrote: > > Mywater pump pulley departed the flange in-flight last night ... > fortunately I was right overhead on cross wind ... heard a fwaap and a > buzz thought something went through the exhaustor had lost an > accessory belt; scanned the gauges, water temp and pressure were > building fast, I cut the throttle and headed for 06 ... checked the > voltmeter which showed +14V so was pretty sure at least one belt was > driving the alternator ... made my best landing in a long time then > taxied back to the hangar. Probably should have shutdown the engine > right away but didn't and it boiled over in front of the hangar. Of > course my brother was there to see this bird fly for the first time; > not exactly the demonstration I wanted. Popped the top cowling and > found the water pump pulley departed but still inside the cowling.The > outer belt was turned completely inside-out, which is probably what > made the buzz. > > There are only four small bolts holding that thing in place ... > noticed in Haynes pictures this morning that some have four studs and > four bolts ... guess the studs are for adding a second pulley? -- but > they would also add extra drive surface area. I think I put those > bolts on with standard loctite but am not 100% certain. Anyway now > I'm wondering if my restrictor plate, loading the pump, may have > contributed to more vibration or is this just coincidence ... > > Jeff > > > This message, and the documents attached hereto, is intended only for > the addressee and may contain privileged or confidential information. > Any unauthorized disclosure is strictly prohibited. If you have > received this message in error, please notify us immediately so that > we may correct our internal records. Please then delete the original > message. Thank you. > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --------------080700040804000300080408 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Glad to hear you landed safely, Jeff.

Dave

On 8/4/2011 6:59 AM, Jeff Whaley wrote:

My water pump pulley departed the flange in-flight last night … fortunately I was right overhead on cross wind … heard a fwaap and a buzz thought something went through the exhaust or had lost an accessory belt; scanned the gauges, water temp and pressure were building fast, I cut the throttle and headed for 06 … checked the voltmeter which showed +14V so was pretty sure at least one belt was driving the alternator … made my best landing in a long time then taxied back to the hangar. Probably should have shutdown the engine right away but didn’t and it boiled over in front of the hangar.  Of course my brother was there to see this bird fly for the first time; not exactly the demonstration I wanted.  Popped the top cowling and found the water pump pulley departed but still inside the cowling. The outer belt was turned completely inside-out, which is probably what made the buzz.

 

There are only four small bolts holding that thing in place … noticed in Haynes pictures this morning that some have four studs and four bolts … guess the studs are for adding a second pulley? – but they would also add extra drive surface area.  I think I put those bolts on with standard loctite but am not 100% certain.  Anyway now I’m wondering if my restrictor plate, loading the pump, may have contributed to more vibration or is this just coincidence …

Jeff

 


This message, and the documents attached hereto, is intended only for the addressee and may contain privileged or confidential information. Any unauthorized disclosure is strictly prohibited. If you have received this message in error, please notify us immediately so that we may correct our internal records. Please then delete the original message. Thank you.
 

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