X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rtp-iport-2.cisco.com ([64.102.122.149] verified) by logan.com (CommuniGate Pro SMTP 4.3.2) with ESMTP id 962961 for flyrotary@lancaironline.net; Wed, 25 May 2005 11:27:48 -0400 Received-SPF: softfail receiver=logan.com; client-ip=64.102.122.149; envelope-from=echristley@nc.rr.com Received: from rtp-core-2.cisco.com (64.102.124.13) by rtp-iport-2.cisco.com with ESMTP; 25 May 2005 11:27:03 -0400 Received: from xbh-rtp-211.amer.cisco.com (xbh-rtp-211.cisco.com [64.102.31.102]) by rtp-core-2.cisco.com (8.12.10/8.12.6) with ESMTP id j4PFQH5O007461 for ; Wed, 25 May 2005 11:27:01 -0400 (EDT) Received: from xfe-rtp-202.amer.cisco.com ([64.102.31.21]) by xbh-rtp-211.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.211); Wed, 25 May 2005 11:26:57 -0400 Received: from [64.102.45.251] ([64.102.45.251]) by xfe-rtp-202.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.211); Wed, 25 May 2005 11:26:57 -0400 Message-ID: <42949941.60007@nc.rr.com> Date: Wed, 25 May 2005 11:26:57 -0400 From: Ernest Christley User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050317) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Alternate alternator References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 25 May 2005 15:26:57.0238 (UTC) FILETIME=[30138760:01C5613E] Bill Dube wrote: > >> >> I went further and started searching for a good candidate for the >> motor. There is a bunch of electric scooter motors on Ebay selling >> for less that $10 each. For example: >> >> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=75210&item=7157958719&rd=1 >> >> >> These are 24V and rated for 2500 RPM. The voltage is wrong and the >> speed rating is a little low. There are some rated at 2750RPM, but >> I'd like to see 3000. 16A is plenty for a backup generator. >> >> Bill, what do you think? Could you suggest a better candidate motor. > > > I would stay away from the inexpensive brush motors. They > really don't last unless they are high-quality. You want the back-up > to work when you need it. > > Small brushless DC motor/generators are out there, typically > in scooters. They are typically set up for 24 volt input power, but I > suspect they would happily put out 12 volts with modification to the > controller (or complete substitution of the controller for a simple > regulator.) Bill, is there any way to determine if the motor is quality or a piece of junk? The link to the eBay auction was for a scooter motor. Does 'JX Motor Co.', or 'Model: My1018' mean anything? -- ,|"|"|, | ----===<{{(oQo)}}>===---- Dyke Delta | o| d |o www.ernest.isa-geek.org |