X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 944728 for flyrotary@lancaironline.net; Sun, 15 May 2005 10:34:53 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=13brv3@bellsouth.net Received: from ibm56aec.bellsouth.net ([65.6.194.9]) by imf16aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050515143407.KLVK2562.imf16aec.mail.bellsouth.net@ibm56aec.bellsouth.net> for ; Sun, 15 May 2005 10:34:07 -0400 Received: from rd ([65.6.194.9]) by ibm56aec.bellsouth.net (InterMail vG.1.02.00.01 201-2136-104-101-20040929) with ESMTP id <20050515143407.NCPA11479.ibm56aec.bellsouth.net@rd> for ; Sun, 15 May 2005 10:34:07 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: How long can you fly on your battery?? Date: Sun, 15 May 2005 09:34:07 -0500 Message-ID: <000001c5595b$26acc500$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C55931.3DD6BD00" 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 V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C55931.3DD6BD00 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable You will have to fit a car battery. Too many pumps. With Tracy's fuel = pump( one for each tank) no transfer pump no EWP the usual radios Michrotech = emc and engine monitoring. Measured in line with a digital meter < 4 amps. = 16 Ah batt. =3D endurance of 3 to 4 hours. The alternater was only 12 amps!=20 =20 Are you sure you're not using metric amps :-) I have two of Tracy's = pumps, and they pull 6 amps each. I just don't see any possible way you're = pulling less than for amps total. =20 =20 Are you sure you were on a wire that had full current? As I mentioned = in my notes, I had to turn off the alternator when using the battery cable = wire, otherwise, I was measuring the current being put back into the battery = from the alternator, and not the current draw from the engine systems. =20 =20 Why would the current increase so much with RPM ? May be a bit more = for the injectors.( Full on 2 inj. 14ohms 2 amps) The high pressure pump = runs at constant speed. =20 =20 Injectors and ignition coils would both require more current as the rpm increases. I'd really like to get some better data on that, since I = only have the two readings at 1500 and 3000. From those two readings, I'm assuming that each 1500 rpm adds another 2 amps, but that could very = well be wrong. One of these days, I need to pull the panel off the right = armrest, so I can access the battery cable while seated in the plane, then I can = run up to whatever rpm I want to check. =20 =20 Cheers, Rusty (waiting for thunderstorms to clear out) =20 ------=_NextPart_000_0001_01C55931.3DD6BD00 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
You will have to fit a car = battery. Too many=20 pumps. With Tracy's fuel pump( one for each tank) no transfer pump no = EWP the=20 usual radios Michrotech emc and engine monitoring. Measured in line with = a=20 digital meter < 4 amps. 16 Ah batt. =3D endurance of 3 to 4 hours. = The=20 alternater was only 12 amps! 
 
Are you sure you're not using metric amps = :-)   I=20 have two of Tracy's pumps, and they pull 6 amps each.  = I just=20 don't see any possible way you're pulling less than for amps = total. =20
 
Are you sure you were on a wire that had full=20 current?  As I mentioned = in my=20 notes, I had to turn off the alternator when using the battery cable = wire,=20 otherwise, I was measuring the current being put back into the battery = from the=20 alternator, and not the current draw from the engine systems. =20
 
 Why would the current increase = so much=20 with RPM ?  May be a bit more for the injectors.( Full on 2 inj. = 14ohms 2=20 amps) The high pressure pump runs at constant = speed.   
 
Injectors and ignition coils would both require = more=20 current as the rpm increases.  I'd really like to get some better = data on=20 that, since I only have the two readings at 1500 and 3000.  From = those two=20 readings, I'm assuming that each 1500 rpm adds another 2 amps, but that = could=20 very well be wrong.  One of these days, I need to pull the panel = off the=20 right armrest, so I can access the battery cable while seated in the = plane, then=20 I can run up to whatever rpm I want to check. =20
 
Cheers,
Rusty (waiting for thunderstorms to clear=20 out)
 
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