Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 613380 for flyrotary@lancaironline.net; Wed, 19 Jan 2005 14:01:43 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050119190111.VJRE2032.imf24aec.mail.bellsouth.net@rd> for ; Wed, 19 Jan 2005 14:01:11 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Battery load test Date: Wed, 19 Jan 2005 13:01:22 -0600 Message-ID: <004a01c4fe59$4481d3c0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004B_01C4FE26.F9E763C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_004B_01C4FE26.F9E763C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Rusty, I may be completely wrong, but the load testers do basically the = same thing more conveniently. You might wait for hours for the EC-2 and a = couple fuel pumps to pull the battery down far enough to be meaningful. The = load testers will flow big current and is already attached to a voltmeter. = Hook it up and know how healthy the battery is in only a few minutes. The load tester will give a general idea of the health of the battery perhaps, but then you'd have to do some other tests to find out how long your engine can run on a healthy battery. Then you have to try to = adjust that time for a "semi, and "not so" healthy battery. What you end up = with is an estimate. Wouldn't it be better to be able to do the test = directly, and know how long it will really last? I sure wish it would be hours as = you suggest, but I'm figuring I'd better be on the ground somewhere in about = 20 minutes. =20 =20 I've thought about tying the plane up, and running it at a fairly high (whatever I can cool on the ground) power setting with the alternator = off, to see how long it will run. The only problem is that I think my hanger neighbors would string me up by the naughty bits if I did that. I'd probably have to go to the other side of the airport, where I'd only irritate the folks in the park next door. =20 =20 Cheers, Rusty (about to order some parts finally) =20 ------=_NextPart_000_004B_01C4FE26.F9E763C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Rusty, I may be completely wrong, but the load testers = do=20 basically the same thing more conveniently.  You might wait for = hours for=20 the EC-2 and a couple fuel pumps to pull the battery down far enough to = be=20 meaningful.  The load testers will flow big current and is already = attached=20 to a voltmeter.  Hook it up and know how healthy the battery is in = only a=20 few minutes.

The load = tester will=20 give a general idea of the health of the battery perhaps, but then you'd = have to=20 do some other tests to find out how long your engine can run on a = healthy=20 battery.  Then you have to try to adjust that time for a = "semi, and=20 "not so" healthy battery.  What you end up with is an = estimate. =20 Wouldn't it be better to be able to do the test directly, and know how = long it=20 will really last?  I sure wish it would be hours as you suggest, = but I'm=20 figuring I'd better be on the ground somewhere in about 20 = minutes. =20
 
I've = thought about tying=20 the plane up, and running it at a fairly high (whatever I can cool on = the=20 ground) power setting with the alternator off, to see how long it will=20 run.  The only problem is that I think my hanger = neighbors would=20 string me up by the naughty bits if I did that.  I'd probably have = to go to=20 the other side of the airport, where I'd only irritate the folks in the = park=20 next door.  
 
Cheers,
Rusty = (about to order=20 some parts finally)     



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