X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-wy0-f180.google.com ([74.125.82.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTPS id 5081989 for flyrotary@lancaironline.net; Thu, 04 Aug 2011 12:49:23 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.82.180; envelope-from=wdleonard@gmail.com Received: by wyj26 with SMTP id 26so439652wyj.25 for ; Thu, 04 Aug 2011 09:48:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=okh24kaUiLtpDFPBRbjH92kZPAXuQHbK9qXcgrlwNu0=; b=Qrv5r9IC55lhfODPpQd9Kg6czBCrGXVQfdrMekO42oR9FLPirRG5nT7Zoo9jQRu0JA quBNU0nHK8CwdQrX7qhZGM7X2UsqWUTDYq6xS7BQoP187I/7PXbf2tEgDLeetJ2WkeuY t4JBkVJUGbtx2BzZ1Dr7ooFb9ArwUaaHwtz4k= MIME-Version: 1.0 Received: by 10.227.205.78 with SMTP id fp14mr904114wbb.65.1312476527734; Thu, 04 Aug 2011 09:48:47 -0700 (PDT) Received: by 10.227.156.3 with HTTP; Thu, 4 Aug 2011 09:48:47 -0700 (PDT) In-Reply-To: References: Date: Thu, 4 Aug 2011 09:48:47 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Water pump pulley departed in-flight From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001517478f503632d904a9b0c1d9 --001517478f503632d904a9b0c1d9 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable It really is amazing that we keep coming up with different ways to make the whirly thing stop going round and round. Nice job with the emergency Jeff. --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Thu, Aug 4, 2011 at 7:35 AM, wrote: > ** > Notice the offset of the pulley vice the flange centerline. The bolts are > in shear for driving forces (very light) and in bending for belt tension > (slightly higher load) so the little guys are working hard, and more bolt= s > is a better answer. Racers run the single belt with the stock alternator > location, and just about 30% of the water pump pulley engaged with no > problems at all, so loads are light. I use bolts in all 8 holes with > Locktite. If your pumps have only 4 holes, add 4 more and tap. And actual= ly > measure belt tension. There are stock two sheave water pump pulleys, wher= e > you run the alternator and, or, air conditioning with a two sheave crank > pulley. And there is a belt length that you can run the water pump from t= he > Mazda Competition pulley (smaller diameter) with no idler at all and perf= ect > belt tension. > > No pulley failures since that first one in 1980, (with 4 bolts). > > Lynn E. Hanover > > > > In a message dated 8/4/2011 7:59:53 A.M. Paraguay Standard Time, > jwhaley@datacast.com writes: > > There are only four small bolts holding that thing in place =85 noticed i= n > Haynes pictures this morning that some have four studs and four bolts =85 > guess the studs are for adding a second pulley? =96 but they would also a= dd > extra drive surface area. I think I put those bolts on with standard > loctite but am not 100% certain. Anyway now I=92m wondering if my restri= ctor > plate, loading the pump, may have contributed to more vibration or is thi= s > just coincidence =85 **** > > Jeff**** > > --001517478f503632d904a9b0c1d9 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
It really is amazing that we keep coming up with different ways to mak= e the whirly thing stop going round and round.=A0 Nice job with the emergen= cy=A0Jeff.
=A0
--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net


On Thu, Aug 4, 2011 at 7:35 AM, <Lehanover@aol.com>= wrote:
Notice the offset of the pulley vice the flange centerline. The bolts = are in shear for driving forces (very light) and in bending for belt tensio= n (slightly higher load) so the little guys are working hard, and more bolt= s is a better answer. Racers run the single belt with the stock alternator = location, and just about 30% of the water pump pulley engaged with no probl= ems at all, so loads are light. I use bolts in all 8 holes with Locktite. I= f your pumps have only 4 holes, add 4 more and tap. And actually measure be= lt tension. There are stock two sheave water pump pulleys, where you run th= e alternator and, or, air conditioning with a two sheave crank pulley. And = there is a belt length that you can run the water pump from the Mazda Compe= tition pulley (smaller diameter) with no idler at all and perfect belt tens= ion.
=A0
No pulley failures since that first one in 1980, (with 4 bolts).
=A0
Lynn E. Hanover=A0=A0=A0
=A0
=A0
=A0



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