Return-Path: <13brv3@bellsouth.net> Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 520530 for flyrotary@lancaironline.net; Sat, 06 Nov 2004 11:12:03 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.67; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041106161134.NMGT2400.imf19aec.mail.bellsouth.net@rd> for ; Sat, 6 Nov 2004 11:11:34 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] EWP Date: Sat, 6 Nov 2004 10:11:41 -0600 Message-ID: <000701c4c41b$4d9f40a0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01C4C3E9.0304D0A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 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_0008_01C4C3E9.0304D0A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Did anybody figure out by how much the engine run time will be shortened after an alternator failure. Now we know the engine will run approx. 1 = hour before it quits. The electric water pump will shorten this time a lot I think. Bulent =20 This will of course depend on your battery situation (how many, what = size), and what else you need to run. I believe the Davies Craig EWP only = pulls a few amps when running (added to my note to check this), so it will = shorten the time, but not by enough to keep me from using one. =20 =20 The unfortunately point for my setup is that the alternator and wp share = a single belt. If I lose the alternator in flight, I have to assume that = the most likely cause is a broken or thrown belt, which means my mechanical = pump is also offline. Now, I'm trying to save electricity to stretch my = battery only range, but I don't dare turn off the EWP because I'll almost = instantly overheat if the mechanical pump isn't running. Fortunately, a 200 mph = plane can get to an airport pretty quickly, with the help of the nearest = function on the GPS. =20 =20 Cheers, Rusty =20 ------=_NextPart_000_0008_01C4C3E9.0304D0A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Did anybody figure out by how much the engine run time = will be=20 shortened after an alternator failure. Now we know the engine will run = approx. 1=20 hour before it quits. The electric water pump will shorten this time a = lot I=20 think.
Bulent

 
This = will of course=20 depend on your battery situation (how many, what size), and what else = you need=20 to run.  I believe the Davies Craig EWP only pulls a few amps when = running=20 (added to my note to check this), so it will shorten the time, but not=20 by enough to keep me from using = one.  
 
The = unfortunately=20 point for my setup is that the alternator and wp share a single = belt. =20 If I lose the alternator in flight, I have to assume that the most = likely cause=20 is a broken or thrown belt, which means my mechanical pump is also=20 offline.  Now, I'm trying to save electricity to stretch my = battery=20 only range, but I don't dare turn off the EWP because I'll almost = instantly=20 overheat if the mechanical pump isn't running.  Fortunately, a = 200 mph=20 plane can get to an airport pretty quickly, with the help of the nearest = function on the GPS.  
 
Cheers,
Rusty
 

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