Return-Path: Received: from fed1rmmtao07.cox.net ([68.230.241.32] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 528405 for flyrotary@lancaironline.net; Thu, 11 Nov 2004 19:09:21 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.32; envelope-from=ALVentures@cox.net Received: from BigAl ([68.107.116.221]) by fed1rmmtao07.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20041112000849.EHEX3261.fed1rmmtao07.cox.net@BigAl> for ; Thu, 11 Nov 2004 19:08:49 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: EWP Date: Thu, 11 Nov 2004 16:08:53 -0800 Message-ID: <002601c4c84b$cb500d20$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0027_01C4C808.BD2CCD20" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0027_01C4C808.BD2CCD20 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: [FlyRotary] Re: EWP =20 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. =20 Water pump and alternator turn the same direction as the e-shaft. =20 Al -----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 =20 Subject: [FlyRotary] Re: EWP =20 Al,=20 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; =20 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. =20 Al =20 ------=_NextPart_000_0027_01C4C808.BD2CCD20 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Subject: [FlyRotary] Re: EWP

 

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.

 

Water pump and alternator turn = the same direction as the e-shaft.

 

Al

-----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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