Return-Path: Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 528365 for flyrotary@lancaironline.net; Thu, 11 Nov 2004 18:29:12 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.131.115; envelope-from=keltro@att.net Received: from 204.127.135.75 ([204.127.135.75]) by worldnet.att.net (mtiwmhc11) with SMTP id <2004111123284211100ik327e>; Thu, 11 Nov 2004 23:28:42 +0000 Received: from [209.247.222.88] by 204.127.135.75; Thu, 11 Nov 2004 23:28:40 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: EWP Date: Thu, 11 Nov 2004 23:28:40 +0000 Message-Id: <111120042328.24864.4193F5A80001D9FF000061202160466648019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Oct 18 2004) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_24864_1100215720_0" --NextPart_Webmail_9m3u9jl4l_24864_1100215720_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Marc, My 13B Cosmo waterpump is same rotation as the 86-91 13B........Same for the alternator........Although the belts are surpentine instead of "V" belts . I am 99% sure the 20B Cosmo is the same . -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Marc Wiese" : -------------- Did you account for the fact that the 20B pump might be belted to run in the reverse direction than the 13Bs? I can’t remember my 20B belt layout anymore……wonder if the alternator does too. Marc W. -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Wednesday, November 10, 2004 12:13 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: EWP Subject: [FlyRotary] Re: EWP Al, Good data, but for clarification, aren't you running a 13B pump on your 20B? Are you running stock main pulley or an undersized pulley? The 20B pump should flow more gpm due to a slightly larger impeller. Also, comparing a 20B eccentric pulley with a 13B from an 89 n/a engine, the 20B pulley is larger, which should also increase flow, up to the point of cavitation. Mark S. Mark; Yes, I have a 13B pump housing; I’m not sure what impeller. All I know is Dave Atkins billed it as “high performance”. The pump pulley and the e-shaft pulley are the same size, which I believe is 11 - 12 cm. I can’t confirm right now because I’d have to take the cowl off to check. Al --NextPart_Webmail_9m3u9jl4l_24864_1100215720_0 Content-Type: text/html Content-Transfer-Encoding: 8bit
Marc,
  My 13B Cosmo waterpump is same rotation as the 86-91 13B........Same for
the alternator........Although the belts are surpentine instead of "V" belts . I
am 99% sure the 20B Cosmo is the same .
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from "Marc Wiese" <cardmarc@charter.net>: --------------

Did you account for the fact that the 20B pump might be belted to run in the reverse direction than the 13Bs? I can’t remember my 20B belt layout anymore……wonder if the alternator does too.

Marc W.

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Wednesday, November 10, 2004 12:13 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: EWP

 

Subject: [FlyRotary] Re: EWP

 

Al,
Good data, but for clarification, aren't you running a 13B pump on your 20B?  Are you running stock main pulley or an undersized pulley?  The 20B pump should flow more gpm due to a slightly larger impeller.  Also, comparing a 20B eccentric pulley with a 13B from an 89 n/a engine, the 20B pulley is larger, which should also increase flow, up to the point of cavitation.

Mark S.

Mark;

 

Yes, I have a 13B pump housing; I’m not sure what impeller.  All I know is Dave Atkins billed it as “high performance”.  The pump pulley and the e-shaft pulley are the same size, which I believe is 11 - 12 cm.  I can’t confirm right now because I’d have to take the cowl off to check.

 

Al

 

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