X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: Date: Fri, 06 Nov 2009 00:35:10 -0500 Message-ID: X-Original-Return-Path: Received: from mail-yx0-f184.google.com ([209.85.210.184] verified) by logan.com (CommuniGate Pro SMTP 5.3c1) with ESMTP id 3950423 for lml@lancaironline.net; Thu, 05 Nov 2009 22:00:04 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.184; envelope-from=bakercdb@gmail.com Received: by yxe14 with SMTP id 14so624160yxe.7 for ; Thu, 05 Nov 2009 18:59:29 -0800 (PST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=BijcRLmwt7wV/qEhhZqDw/GLQsqEwFkjr//rU4TvmkRoSAK2TGDhPPZdTOnCuAeAiZ O2qatLpJ2I8yHU+/KQeENbEVMII/YxBFDfIlXJ0oWwth9EFYf42URQYzagSI7J1KN6Uu QYw2Brw8OxkNnmId6hf4hDyAr0oaojFs9Anzc= MIME-Version: 1.0 Received: by 10.150.65.9 with SMTP id n9mr6688019yba.147.1257476369660; Thu, 05 Nov 2009 18:59:29 -0800 (PST) In-Reply-To: <016801ca5daf$75df5130$0201a8c0@perihelia02306> References: <175557b90911041453v73170b9ar16dd0558a7331ca@mail.gmail.com> <016801ca5daf$75df5130$0201a8c0@perihelia02306> X-Original-Date: Thu, 5 Nov 2009 21:59:29 -0500 X-Original-Message-ID: <175557b90911051859x6bcde3bcu7b851a7e78f703cb@mail.gmail.com> Subject: L-IVP Battery Cooling From: Clark Baker X-Original-To: Lancair Mailing List Content-Type: multipart/alternative; boundary=000e0cd48b9c53bc8a0477ab08db --000e0cd48b9c53bc8a0477ab08db Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable >>>Also, a remote location causes more voltage drop due to the longer cable. I have one battery in the back and tried copper wire (very heavy) and had almost no voltage drop, but when I checked aluminum wires (very light), I had nearly 1.0v drop from the terminals to the Buss. Aluminum is OK for avionics Buss, but not cranking or hydralic pump amp (too much heat and volt loss), if drawing off a battery behind the rear bulkhead. My humble opinion. < Date: Wed, Nov 4, 2009 at 7:32 PM Subject: Re: [LML] Re: L-IVP Battery Cooling To: Clark Baker Thanks Clark, (Please post if you want). Aluminum wire is touchy because of the special preparation needed, especially for the ends. Copper-Clad Aluminum wire (CCA) has never had a problem history, since its exterior is copper. About Super-2-CCA Fatwire: Specifications: Weight of the insulated wire is 3.08 ounces/foot. Diameter with insulation is 0.562" Bend radius=97about one inch. Very flexible and easy to handle. Insulation material: Custom polyvinyl TPE proprietary Flame retardant, 105 =B0C, fuel proof, oil proof, cut resistant, low smoke, non-cracking at low temperature. Resistance/ft 0.134 milliohms/foot (This is an amazing 86% the resistance o= f copper! In fact it is far less even than an AWG 2 *silver* conductor) Recommended connectors: AMP Solistrand=99, Tin plated copper per MIL-T-1072= 7. UL/CSA/MIL 170 =B0C Super-2-CCA (Copper Clad Aluminum) is a custom-made wire specially designed for experimental aircraft battery-starter wire and ground conductor bus applications. Nominally it has the characteristics of AWG 2 copper wire, bu= t is much lighter in weight, and much lower resistance. It's hard to say more. I sell miles of this stuff to the military. I have sold Super-2 to people building Seawinds, which has the engine in the tail and the batteries in the nose 32' away. They replace AWG 1/0 wire with Super-2-CCA. Refer them to: http://www.periheliondesign.com/fatwires_files/Copper%20cables.pdf http://www.periheliondesign.com/fatwires_files/fatwire2flyer.pdf I also sell Super-4-CCA and a special 6 AWG-CCA in ETFE insulation. I will send samples to interested buyers. One more thing--Insulation on battery cables is usually not important because the battery can't supply the current needed to heat it up. I don't think you can point to a fire/smoke problem that occurred with a copper or copper-clad-aluminum battery cable. The insulation in small-sized wire is the only issue. Plain aluminum cables that corrode and degrade can have a variety of problems. --000e0cd48b9c53bc8a0477ab08db Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
>>>Also, a remote location causes = more voltage drop due to the longer cable.=A0 I have one battery in the bac= k and tried copper wire (very heavy) and had almost no voltage drop, but wh= en I checked aluminum wires (very light), I had nearly 1.0v drop from the t= erminals to the Buss.=A0 Aluminum is OK for avionics Buss, but not cranking= or hydralic pump amp (too much heat and volt loss), if drawing off a batte= ry behind the rear bulkhead.=A0 My humble opinion.

<<My plan = therefore is to make sure something else opens or fuses before the wire mel= ts down.<<

=
I was curious about the statements above since I am using CCA (copper = clad aluminum) battery wiring in my Legacy. =A0Below are comments from Eric= Jones at Perihelion Designs.


From: Eric M. Jones <emjones@charter.net>
Date: Wed, Nov 4, 20= 09 at 7:32 PM
Subject: Re: [LML] Re: L-IVP Battery Cooling
To: Clark Baker <bakercdb@gmail.com>


Thanks Clark,
=A0
(Please post if you want).
=A0
Aluminum wire is touchy because of the= special=20 preparation needed, especially=A0for the ends. Copper-Clad Aluminum wire=20 (CCA) has never had a problem history, since its=A0exterior is=20 copper.
=A0

About Super-2-CCA= Fatwire:

=A0=

Specifications:

=A0

Weight of th= e insulated wire is 3.08 ounces/foot.=20

Diameter wit= h insulation is 0.562"
Bend radius=97about=20 one inch. Very flexible and easy to handle.

Insulation m= aterial: Custom polyvinyl TPE proprietary=20

Flame retard= ant, 105 =B0C, fuel proof, oil proof, cut=20 resistant, low smoke, non-cracking at low=20 temperature.

Resistance/f= t 0.134 milliohms/foot (This is an amazing=20 86% the resistance of copper! In fact it is far less even than an AWG 2=20 silver conductor)

Recommended = connectors: AMP Solistrand=99, Tin plated=20 copper per MIL-T-10727. UL/CSA/MIL 170 =B0C

Super-2-CCA (Copper Clad Aluminum) is a custom-made wire= specially=20 designed for experimental aircraft battery-starter wire and ground conducto= r bus=20 applications. Nominally it has the characteristics of AWG 2 copper wire, bu= t is=20 much lighter in weight, and much lower resistance.
=A0
It's hard to say more. I sell=A0mil= es of this stuff to the=20 military.=A0 I have sold Super-2 to peop= le=20 building Seawinds, which has the engine in the tail and the batteries in th= e=20 nose 32' away. They replace AWG 1/0 wire with Super-2-CCA.
=A0
Refer them to:
=A0
=A0
=A0
I also sell Super-4-CCA and a special = 6 AWG-CCA in=20 ETFE insulation. I will send samples to interested buyers.
=A0
One more thing--Insulation on battery = cables is=20 usually not important because the battery can't supply the current need= ed to=20 heat it up. I don't think you can point to a fire/smoke problem that=20 occurred=A0with a copper or copper-clad-aluminum battery cable. The=20 insulation in small-sized wire is the only issue. Plain aluminum cables tha= t=20 corrode and degrade can have a variety of problems.
<= /div>
=A0
=A0
--000e0cd48b9c53bc8a0477ab08db--