Return-Path: Received: from [199.185.220.223] (HELO priv-edtnes27.telusplanet.net) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 764073 for flyrotary@lancaironline.net; Tue, 01 Mar 2005 01:51:39 -0500 Received-SPF: pass receiver=logan.com; client-ip=199.185.220.223; envelope-from=haywire@telus.net Received: from Endurance ([207.81.25.155]) by priv-edtnes27.telusplanet.net (InterMail vM.6.01.04.00 201-2131-118-20041027) with SMTP id <20050301065046.IPUA3460.priv-edtnes27.telusplanet.net@Endurance> for ; Mon, 28 Feb 2005 23:50:46 -0700 From: "Todd Bartrim" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: flow measurements Date: Mon, 28 Feb 2005 22:50:29 -0800 Message-ID: <000801c51e2a$f58e4a90$0201a8c0@Endurance> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01C51DE7.E76B0A90" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01C51DE7.E76B0A90 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message I bought an RCM-7000 guage on ebay for $50.00 with a measurement range of 4 to 30 GPM. A Google search for RCM-7000 only found a "coverslipping machine" whatever that is? So what sort of flow gauge is it that you've got there? I ended up buying two mechanical gauges from McMaster Carr. One is 1-4.5 gpm, and the other is 5-30 gpm (the highest in that type of gauge). Each was $59. Rusty Same Question? Whacha got? Can either of these be used in flight or is it just for ground tests? Are these an orifice type? (square root extraction of DP). If so then they will add a little restriction, but this is where that pressure recovery and permanent pressure loss comes into play. The best, most accurate and least restrictive way to measure is using a magnetic flowtube, which I used in my initial testing. Unfortunately these are unsuitable for in-flight use due to weight, size, $$$$$$$$$$$, and power requirements. The Signet flowmeter that I used was $543 CAD. At least that's what my uuhh... "supplier" had paid for it. (obsolete stock) Todd Bartrim ------=_NextPart_000_0009_01C51DE7.E76B0A90 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
 
 I bought=20 an RCM-7000 guage on ebay for $50.00 with a measurement range of 4 to = 30=20 GPM. 
 
A Google = search for=20 RCM-7000 only found a "coverslipping machine" whatever that is? So = what sort=20 of flow gauge is it that you've got there?
 
 
 I ended up buying two = mechanical gauges=20 from McMaster Carr.  One is 1-4.5 gpm, and the other is 5-30 gpm = (the=20 highest in that type of gauge).  Each was = $59.  
 Rusty

  Same = Question?=20 Whacha got? Can either of these be used in flight or is it just = for=20 ground tests? Are these an orifice type? (square root extraction of = DP). If so=20 then they will add a little restriction, but this is where that = pressure=20 recovery and permanent pressure loss comes into=20 play.

The=20 best, most accurate and least restrictive way to measure is using a = magnetic=20 flowtube, which I used in my initial testing. Unfortunately these are=20 unsuitable for in-flight use due to weight, size, $$$$$$$$$$$, and = power=20 requirements.

The=20 Signet flowmeter that I used was $543 CAD. At least that's what my = uuhh...=20 "supplier" had paid for it. (obsolete stock)

Todd=20 Bartrim

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