Return-Path: Received: from [65.33.166.167] (account ) by logan.com (CommuniGate Pro WebUser 4.0b9) with HTTP id 1803880 for ; Sat, 12 Oct 2002 08:30:33 -0400 From: "Marvin Kaye" Subject: Re: [FlyRotary] Re: EWP water pump To: flyrotary X-Mailer: CommuniGate Pro Web Mailer v.4.0b9 Date: Sat, 12 Oct 2002 08:30:33 -0400 Message-ID: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "Haywire" : Hi Bill; This is an excellent suggestion. Unfortunately I've already completed the installation. If I have time before I run the engine I will remove it and subject it to these tests. I was thinking of removing the hose from one rad and putting it in water, then measure flow out of the other rad, but this would have to be carefully supplied water as any variability in the water head pressure to the pump will skew the test results. Water would have to pump from a container at approx the same height as the engine & have an assistant keep container full to a constant height with a hose. I think the only meaningful test results would be from a flow meter installed in a closed system. I'll see if I can get a suitable rotometer from work, although this type of flow meter creates a restriction that again will affect the results. It would be alot of work but I may be able to hook up a mag tube flow meter for a test. This would give accurate results. I will eventually build a "trendlink" program which would record all flight & engine data, then data can be shown as a trend and it's relationship to other factors is very clear. This may be the best tool for analysing the performance of this pump in various flight (load) conditions. S. Todd Bartrim Turbo 13B rotary powered RV-9endurance (FWF) C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm > If you can set up a flow system, where the pump removes water from a 55 > gallon barrel, has a pressure gauge on the output side, a > throttable valve, > and a means of measuring the flow volume (either a flow meter or > a bucket and > stop watch), you can get some very valuable data.