Return-Path: Received: from mxsf08.cluster1.charter.net ([209.225.28.208] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 528337 for flyrotary@lancaironline.net; Thu, 11 Nov 2004 18:05:34 -0500 Received-SPF: none receiver=logan.com; client-ip=209.225.28.208; envelope-from=cardmarc@charter.net Received: from mxip07.cluster1.charter.net (mxip07a.cluster1.charter.net [209.225.28.137]) by mxsf08.cluster1.charter.net (8.12.11/8.12.11) with ESMTP id iABN4xE4016246 for ; Thu, 11 Nov 2004 18:05:00 -0500 Received: from 68.185.193.167.ts46v-02.dntn.tx.charter.com (HELO homeoffice) (68.185.193.167) by mxip07.cluster1.charter.net with ESMTP; 11 Nov 2004 18:04:59 -0500 X-Ironport-AV: i="3.86,139,1096862400"; d="scan'217,208"; a="419068808:sNHT22012312" From: "Marc Wiese" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: EWP Date: Thu, 11 Nov 2004 17:04:54 -0600 Message-ID: <000a01c4c842$e5fc7220$6502a8c0@homeoffice> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01C4C810.9B620220" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C4C810.9B620220 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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_000_000B_01C4C810.9B620220 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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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