X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail30.syd.optusnet.com.au ([211.29.133.193] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTPS id 1226539 for flyrotary@lancaironline.net; Thu, 06 Jul 2006 18:12:22 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.193; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-115-174.dsl.nsw.optusnet.com.au [220.236.115.174]) by mail30.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id k66MBTI7028434 for ; Fri, 7 Jul 2006 08:11:33 +1000 Message-ID: <000d01c6a149$24b6c480$ae73ecdc@george> From: "george lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Nothing to do with Rotary Engines, but.... Date: Fri, 7 Jul 2006 08:11:33 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 > Hi Bill, > > I'm relieved. I won't have to mortgage the house until the technology > advances enough to reduces the weight by a factor of 5. Currently it > looks like I would need about 1400 lbs of batteries. Get it down to > 280 lbs and allow 100 lbs for the electric motor and my W&B will work > out about right. :) > > I'm looking forward to seeing what you come up with for the aircraft > batteries. > > Bob W. Bob or Bill I would have thought a 130hp DC Motor would weigh more than 100lbs. Any rule of thumb on weight of motor to power output ?- I guess there's a lot of copper windings per HP!? George (down under)