X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.25.9.100] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1226625 for flyrotary@lancaironline.net; Thu, 06 Jul 2006 19:18:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-111-186.carolina.res.rr.com [24.74.111.186]) by ms-smtp-01.southeast.rr.com (8.13.6/8.13.6) with SMTP id k66NHugM028898 for ; Thu, 6 Jul 2006 19:17:58 -0400 (EDT) Message-ID: <000901c6a152$743490b0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Nothing to do with Rotary Engines, but.... Date: Thu, 6 Jul 2006 19:18:13 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Virus-Scanned: Symantec AntiVirus Scan Engine Bob, I suspect that you can apply more voltage than the motor is rated for to get extra power - probably a question of how long the motor can take it. A dragster's time is over in few fractions of a second - so the motor may not have caught fire, but I'll bet its smoking {:>). A road racer might be a different story. Just a wag on my part, Bill would clearly know. Ed ----- Original Message ----- From: "Bob White" To: "Rotary motors in aircraft" Sent: Thursday, July 06, 2006 7:05 PM Subject: [FlyRotary] Re: Nothing to do with Rotary Engines, but.... > You could be right George. 100 lbs was a complete WAG on my part. I > did a quick search on google, but couldn't find any engine weights vs > hp, but I did find a site where someone made an electric drag car out > of a RX-7. http://www.dragtimes.com/Mazda-RX-7-Timeslip-7519.html > > They mentions using a 42 HP electric motor, but generating 300 HP from > it for the drag time. Apparently electric motor hp and gasoling engine > hp don't correlate. I'll leave it to Bill to give a knowledgeable > answer. :) > > What is the hp rating and weight of the motor on your bike Bill? > > Bob W. > > > On Fri, 7 Jul 2006 08:11:33 +1000 > "george lendich" wrote: > >> >> > 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) >> >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > > > -- > http://www.bob-white.com > N93BD - Rotary Powered BD-4 (first engine start 1/7/06) > Custom Cables for your rotary installation - > http://www.roblinphoto.com/shop/ > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >