Return-Path: Received: from hawk.prod.itd.earthlink.net ([207.217.120.22]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Sun, 31 Dec 2000 03:06:48 -0500 Received: from walter (pool0229.cvx8-bradley.dialup.earthlink.net [209.178.170.229]) by hawk.prod.itd.earthlink.net (EL-8_9_3_3/8.9.3) with SMTP id AAA12803 for ; Sun, 31 Dec 2000 00:14:54 -0800 (PST) Message-ID: <001701c07302$9a98ae00$d7c4fea9@walter> From: "Walter Dodson" To: "LancairList" Subject: Hard carbon brushes Date: Sun, 31 Dec 2000 00:20:54 -0800 X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Aircraft alternators use special brushes which are made of a harder carbon compound than automotive brushes. I once had to replace brushes in an alternator which had only about 300 hours in a Cessna 172. It had been overhauled by the local tractor service company in Santa Maria, CA (by the sticker on it). The brushes were gone and the unit was full of carbon dust. Please, for your own health, do not use an automotive unit in your aircraft! Brushes are available for the common Ford and Chrysler units used in aircraft from Pfiffer but they won't sell them to private parties, you must be an overhaul facility. I'm lucky to have some om the shelf. Electrosystems of Fort Deposit, AL may be able to supply standard types. Locking tabs for the thru bolts are also available. I'm not aware of any other differences save inspection, records and price. Walter Dodson 1895740 IA >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>