Return-Path: Received: from mtiwmhc13.worldnet.att.net ([204.127.131.117] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 814948 for flyrotary@lancaironline.net; Mon, 21 Mar 2005 21:50:50 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.131.117; envelope-from=keltro@att.net Received: from 204.127.135.63 ([204.127.135.63]) by worldnet.att.net (mtiwmhc13) with SMTP id <20050322025006113007j3uge>; Tue, 22 Mar 2005 02:50:06 +0000 Received: from [209.247.222.112] by 204.127.135.63; Tue, 22 Mar 2005 02:50:06 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: Under driven waterpump pulley Date: Tue, 22 Mar 2005 02:50:06 +0000 Message-Id: <032220050250.15454.423F87DD000CB77400003C5E2160376223019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 14 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_15454_1111459806_0" --NextPart_Webmail_9m3u9jl4l_15454_1111459806_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Jim, Pulley interference......If the waterpump pulley is much bigger it will contact the eccentric shaft pulley..... -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from Jim Sower : -------------- > <... The reason that the water pump pulley in question is 5 inches in > diameter is that with the reduced diameter "Racing Beat" eccentric shaft > pulley that most of us use it is impossible use a larger pulley on the > water pump .... > I'm lost here ... what makes it "impossible"? Pulley interference? Not > enough belt contact on E-shaft pulley? > I'll have to take a closer look at my water pump ... Jim S. > > > Kelly Troyer wrote: > > > Jim, > > Looking into warerpump impeller design is way past my desire or > > ability........I am sure > > that with enough time and money a more efficient pump can be > > had......That being said > > I want to get into the air in this lifetime and chose to use the stock > > pump which has been > > proven by Tracy and many others........It has also been documented by > > several that the > > stock pump is on the edge of cavitation between 6500-7000 engine > > rpm........For that > > reason I think it would be prudent to underdrive the pump for those of > > us using the > > RD1C 2.85 redrive........Tracy, Ed and others are already closing in > > on 7000 rpm in cruise > > if they choose........Tracy runs well over 7000 rpm when > > racing........The reason that the > > warerpump pulley in question is 5 inches in diameter is that with the > > reduced diameter > > "Racing Beat" eccentric shaft pulley that most of us use it is > > impossible use a larger > > pulley on the waterpump....... IMHO > > -- > > Kelly Troyer > > Dyke Delta/13B/RD1C/EC2 --NextPart_Webmail_9m3u9jl4l_15454_1111459806_0 Content-Type: text/html Content-Transfer-Encoding: 8bit
Jim,
 
Pulley interference......If the waterpump pulley is much bigger it will
contact the eccentric shaft pulley.....
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from Jim Sower <canarder@frontiernet.net>: --------------


> <... The reason that the water pump pulley in question is 5 inches in
> diameter is that with the reduced diameter "Racing Beat" eccentric shaft
> pulley that most of us use it is impossible use a larger pulley on the
> water pump ....
> I'm lost here ... what makes it "impossible"? Pulley interference? Not
> enough belt contact on E-shaft pulley?
> I'll have to take a closer look at my water pump ... Jim S.
>
>
> Kelly Troyer wrote:
>
> > Jim,
> > Looking into warerpump impeller design is way past my desire or
> > ability........I am sure
> > that with enough time and money a more efficient pump can be
> > had......That being said
> > I want to get into the air in this lifetime and chose to use the stock
> > pump which has been
> > proven by Tracy and many others........It has also been documented by
> > several that the
> > stock pump is on the edge of cavitation between 6500-7000 engine
> > rpm........For that
> > reason I think it would be prudent to underdrive the pump for those of
> > us using the
> > RD1C 2.85 redrive........Tracy, Ed and others are already closing in
> > on 7000 rpm in cruise
> > if they choose........Tracy runs well over 7000 rpm when
> > racing........The reason that the
> > warerpump pulley in question is 5 inches in diameter is that with the
> > reduced diameter
> > "Racing Beat" eccentric shaft pulley that most of us use it is
> > impossible use a larger
> > pulley on the waterpump....... IMHO
> > --
> > Kelly Troyer
> > Dyke Delta/13B/RD1C/EC2
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