X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail04.syd.optusnet.com.au ([211.29.132.185] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTPS id 2957266 for flyrotary@lancaironline.net; Sat, 07 Jun 2008 01:55:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=211.29.132.185; envelope-from=lendich@optusnet.com.au Received: from george (d58-104-215-70.dsl.nsw.optusnet.com.au [58.104.215.70]) by mail04.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id m575sj7P014435 for ; Sat, 7 Jun 2008 15:54:48 +1000 Message-ID: <000f01c8c863$01309de0$6400a8c0@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: combined starter alternator Date: Sat, 7 Jun 2008 15:54:50 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C8C8B6.D14767E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C8C8B6.D14767E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Tracy, I believe your right on the money, but I continue to live in hope that = things will get easier. I do however like to understand the issues = involved in their development. Like yourself, my brother is an = electrical engineer, but he doesn't have the same interest in Aviation - = more is the pity. George (down under) My early 60s Suzuki 150 motorcycle had such a setup. All your points are valid but are probably beyond realization not due = to technical reasons but financial. If you could spread the development = costs over a million units it could happen.=20 Factoid : during the last 55 years, 30,000 experimental aircraft = (U.S.) have been registered. Perhaps 1 % of them had alternative = engines. If you wanted to do it yourself, you have only one place to start = looking - Hybrid car drivetrains. Tracy =20 On Tue, Jun 3, 2008 at 6:28 PM, George Lendich = wrote: Directed to the electronic wiz types. This is not a development issue but an educational issue as I would = like to understand the issues associated with developing a starter = alternator. Personally I believe a combined starter, alternator, flywheel, = damper, timing wheel and pick up would be a great advantage (we live to = dream). Some systems use the combined starter alternator attached to the = gear box shaft just, between the motor and the gearbox fluid damper. =20 I believe from talking to Bill Jepson that getting sufficient power = from the current winding used is problematic but that there had been = major improvements in this field. Also reading a little on the Internet = ( if I understand it correctly) an alternator is AC ( alternating = current) and a generator is DC. As Batteries are DC and starters are DC, = we would need to use a DC generator winding in the starter generator = (someone tell if I'm wrong here). Of course nothing is as simple as this, so I'm keen to understand = the issues associated - from anyone out there in the electronics world!? George (down under). -------------------------------------------------------------------------= ----- Internal Virus Database is out-of-date. Checked by AVG.=20 Version: 7.5.524 / Virus Database: 269.24.1/1469 - Release Date: = 27/05/2008 1:25 PM ------=_NextPart_000_000C_01C8C8B6.D14767E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
Tracy,
I believe your right on the money, but = I=20 continue to live in hope that things will get easier. I do however = like to=20 understand the issues involved in their development. Like yourself, my = brother=20 is an electrical engineer, but he doesn't have the same interest in = Aviation -=20 more is the pity.
George (down under)
 
My early 60s Suzuki 150 motorcycle had such a setup.
 
All your points are valid but are probably beyond realization not = due to=20 technical reasons but financial.  If you could spread the=20 development costs over a million units it could = happen. 
 
 Factoid :  during the last 55 years, 30,000 = experimental=20 aircraft (U.S.)  have been registered.   Perhaps 1 = % of them had alternative engines.
 
If you wanted to do it yourself, you have only one place to start = looking=20 - Hybrid car drivetrains.
 
Tracy


 
On Tue, Jun 3, 2008 at 6:28 PM, George = Lendich <lendich@optusnet.com.au>=20 wrote:
Directed to the electronic wiz=20 types.
 
This is not a development issue but = an=20 educational issue as I = would like=20 to understand the issues associated with developing a starter=20 alternator.
 
Personally I believe a combined = starter,=20 alternator, flywheel, damper, timing wheel and pick up would be a = great=20 advantage (we live to dream).
Some systems use the combined = starter=20 alternator attached to the gear box shaft just, between the motor = and the=20 gearbox fluid damper. 
 
I believe from talking to Bill = Jepson that=20 getting sufficient power from the current winding used is=20 problematic but that there had been major improvements in this = field.=20 Also reading a little on the Internet ( if I understand it = correctly) an=20 alternator is AC ( alternating current) and a generator is DC. As = Batteries=20 are DC and starters are DC, we would need to use a DC generator = winding in=20 the starter generator (someone tell if I'm wrong here).
 
Of course nothing is as simple as = this, so I'm=20 keen to understand the issues associated - from anyone out there in = the=20 electronics world!?
George (down=20 under).

Internal Virus Database is out-of-date.
Checked by AVG. =
Version:=20 7.5.524 / Virus Database: 269.24.1/1469 - Release Date: 27/05/2008 = 1:25=20 PM
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