X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [129.116.87.143] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 5.0.7f) with ESMTP id 951756 for flyrotary@lancaironline.net; Tue, 24 Jan 2006 08:21:23 -0500 Received-SPF: none receiver=logan.com; client-ip=129.116.87.143; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C620E8.F6E40F76" Subject: RE: [FlyRotary] Two Alternators? Date: Tue, 24 Jan 2006 07:20:36 -0600 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E0378D872@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Two Alternators? Thread-Index: AcYg4erz5wU1GMI9R4igXS2xCJewxgABazcw From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C620E8.F6E40F76 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Doug, I have dual alternators and dual batteries per Aero-Electric Z-14 architecture. I'm using the small 55amp ND units. They weigh about half of what the Mazda alternator weighs, so I rationalized that there was very little weight penalty to using two alternators, but a significant safety improvement. With an electrically dependent engine and all electric panel, I decided this was the way to go for me. The cross-feed contactor connects both Odyssey batteries during starting, so I am able to use smaller batteries than would be required to start the 3-rotor with only one battery. Every annual, I plan on replacing the main battery, rotating the 1 year old main battery to the aux position, and move the 2 year old aux battery to my Goldwing motorcycle. That way the main battery will be less than one year old, the aux battery will be 1 - 2 years old, and the motorcycle battery will be 2-3 years old. I'll send you a picture off-line. =20 =20 Mark S.=20 =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of DLOMHEIM@aol.com Sent: Tuesday, January 24, 2006 6:11 AM To: Rotary motors in aircraft Subject: [FlyRotary] Two Alternators? =20 I am debating the future use of two batteries vs. two alternators and I was wondering if anyone in the group has mounted a second alternator and if so if they had any pictures of its mounting location, etc. =20 Thanks for the information. =20 Doug Lomheim RV-9A / 13B OK City, OK ------_=_NextPart_001_01C620E8.F6E40F76 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Doug,

I have dual alternators and dual = batteries per Aero-Electric Z-14 architecture. I’m using the small = 55amp ND units. They weigh about half of what the Mazda alternator weighs, = so I rationalized that there was very little weight penalty to using two alternators, but a significant safety improvement. With an = electrically dependent engine and all electric panel, I decided this was the way to = go for me. The cross-feed contactor connects both Odyssey batteries = during starting, so I am able to use smaller batteries than would be required = to start the 3-rotor with only one battery. Every annual, I plan on = replacing the main battery, rotating the 1 year old main battery to the aux position, = and move the 2 year old aux battery to my Goldwing motorcycle. That way the = main battery will be less than one year old, the aux battery will be 1 - 2 = years old, and the motorcycle battery will be 2-3 years old. I’ll = send you a picture off-line.

Mark S. =

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of DLOMHEIM@aol.com
Sent: Tuesday, January = 24, 2006 6:11 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Two Alternators?

I am debating the future use of = two batteries vs. two alternators and I was wondering if anyone in the group = has mounted a second alternator and if so if they had any pictures of its = mounting location, etc.

=

Thanks for the = information.

=

Doug Lomheim = RV-9A / 13B

OK City, = OK

------_=_NextPart_001_01C620E8.F6E40F76--