Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Tue, 22 Oct 2002 00:17:10 -0400 Message-ID: X-Original-Return-Path: Received: from [209.228.32.229] (HELO c003.snv.cp.net) by logan.com (CommuniGate Pro SMTP 4.0) with SMTP id 1841320 for flyrotary@lancaironline.net; Mon, 21 Oct 2002 09:16:21 -0400 Received: (cpmta 9514 invoked from network); 21 Oct 2002 06:16:16 -0700 Received: from 216.227.84.137 (HELO telocity.com) by smtp.telocity.com (209.228.32.229) with SMTP; 21 Oct 2002 06:16:16 -0700 X-Sent: 21 Oct 2002 13:16:16 GMT X-Original-Message-ID: <3DB3FE05.8070006@telocity.com> X-Original-Date: Mon, 21 Oct 2002 09:15:49 -0400 From: Michael Robert User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.0) Gecko/20020530 X-Accept-Language: en-us, en MIME-Version: 1.0 X-Original-To: " (Rotary motors in aircraft)" , FlyRotary List Subject: Re: [FlyRotary] Re: EWP Tech Data Take 1,000,002 References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Al Gietzen wrote: > > From what little data I was able to find for the water pump on the > 20B, it will pump about 35 gpm at engine RPM of 6000. Marginal, at > best, for that climbout on a 90 degree day. At altitude, at cruise; > the EWP may be able to handle it. > Gentlemen: as a data point I have in front of me the factory service manual for the 1985 RX-7. The Technical Data section lists the water pump capacity as 150-160 liters per minute/39.6-42.3 U.S. gpm/33.0-35.2 Imp. gpm at 6500 rpm of engine. They list a 1:1.18 eshaft/pump pulley ratio. Given that these numbers are for both the NA 12A and 13B models I'd definitely check to see if maybe that 20B might require a tad more flow especially running at 6K rpm at a relatively high power setting. -Mike Robert --