Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.93.67.82] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2621988 for flyrotary@lancaironline.net; Thu, 02 Oct 2003 19:54:27 -0400 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-01.southeast.rr.com (8.12.10/8.12.2) with SMTP id h92NklE3017710 for ; Thu, 2 Oct 2003 19:46:48 -0400 (EDT) Message-ID: <008001c38940$3a24ac20$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Electric Water Pumps and Heat Rejection Date: Thu, 2 Oct 2003 19:52:23 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Rino" To: "Rotary motors in aircraft" Sent: Thursday, October 02, 2003 6:53 PM Subject: [FlyRotary] Re: Electric Water Pumps and Heat Rejection > Ed Anderson wrote: > > That analysis was based on the fact that the Mazda water pump > > supposedly consumed 13-16 HP at 6000 rpm. > > > > Ed Anderson > > A half inch V belt will NOT transmit 13-16 HP for very long! I do not > think that is a realistic value. > > Rino I presume you are correct, Rino. The Mazda water pump is driven by two "V" belts on the older engines which would up the capability a bit. But, the main point is - how much power does it really take to flow enough coolant to keep the rotary engine happy at 6000 rpm rather than how much power might the pump be consuming. I don't know the answer, but I agree 16 HP seems a bit on the high side. My point was that if you base analysis on erroneous data or assumptions, then it would seem to follow that the answer you get is liable to be erroneous {:>) Hopefully, Todd will get his bird back into the air with an EWP and we will have real world data/evidence. Ed Anderson