X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Fri, 18 Aug 2006 14:25:20 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m28.mx.aol.com ([64.12.137.9] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1336941 for lml@lancaironline.net; Fri, 18 Aug 2006 08:24:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.9; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m28.mx.aol.com (mail_out_v38_r7.6.) id q.c26.155ee08 (58550) for ; Fri, 18 Aug 2006 08:23:54 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Fri, 18 Aug 2006 08:23:54 EDT Subject: Re: [LML] Starter motors X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1155903834" X-Mailer: 9.0 Security Edition for Windows sub 5330 X-Spam-Flag: NO -------------------------------1155903834 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Dom, I have been using a B&C 149-tooth starter for quite a few years. As I understand it, the earlier Sky-Tech that I had was wound in a way such that as the voltage dropped during start the load would increase and the voltage would drop further. Frequently this would result in poor starting (slower prop turning) and the RMI air data computer would fail, requiring the breaker to be reset. The B&C starter was touted as not increasing the load at the lower voltage, thus not lowering the voltage further. Of course, the starter swap occurred while I was still using magnetos. While my airplane is still using #4 wire for the starter/battery circuit (battery behind the passenger seat), the electronic ignition assists the start so that the engine fires after just a blade or two. Also, a switch to the Perihelion Diode for the Essential Bus reduced the voltage drop on that bus where the RMI instrument is powered. Starts should be a bit harder for my engine because of the higher 9:1 compression ratio, but they are not. Finally, I should point out that there is no linkage or physical connection strap between the starter and alternator. Maybe that is because I use the B&C starter, starter relay, 60 amp alternator, voltage regulator and 28 AH 12 VDC battery. Their stuff seems to work nicely together. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Everything in moderation. -------------------------------1155903834 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Dom,
 
I have been using a B&C 149-tooth starter for quite a few years.&nb= sp;=20 As I understand it, the earlier Sky-Tech that I had was wound in a way such=20= that=20 as the voltage dropped during start the load would increase and the voltage=20 would drop further.  Frequently this would result in poor starting (slo= wer=20 prop turning) and the RMI air data computer would fail, requiring the=20 breaker to be reset.  The B&C starter was touted as not increasing=20= the=20 load at the lower voltage, thus not lowering the voltage further. Of course,= the=20 starter swap occurred while I was still using magnetos.
 
While my airplane is still using #4 wire for the starter/battery circui= t=20 (battery behind the passenger seat), the electronic ignition assists the sta= rt=20 so that the engine fires after just a blade or two.  Also, a switch to=20= the=20 Perihelion Diode for the Essential Bus reduced the voltage drop on that= bus=20 where the RMI instrument is powered.  Starts should be a bit=20 harder for my engine because of the higher 9:1 compression ratio, but t= hey=20 are not.
 
Finally, I should point out that there is no linkage or physical connec= tion=20 strap between the starter and alternator.  Maybe that is because I use=20= the=20 B&C starter, starter relay, 60 amp alternator, voltage regulator and=20 28 AH 12 VDC battery.  Their stuff seems to work nicely=20 together.
 
 
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

Everything in moderation.
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