X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [142.165.20.164] (HELO misav02.sasknet.sk.ca) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1230064 for flyrotary@lancaironline.net; Sun, 09 Jul 2006 20:45:21 -0400 Received-SPF: none receiver=logan.com; client-ip=142.165.20.164; envelope-from=hjjohnson@sasktel.net Received: from bgmpomr2.sasknet.sk.ca ([142.165.72.23]) by misav03 with InterScan Messaging Security Suite; Sun, 09 Jul 2006 18:44:33 -0600 Received: from home ([206.163.240.39]) by bgmpomr2.sasknet.sk.ca (SaskTel eMessaging Service) with ESMTPA id <0J25005ANWQ8KK20@bgmpomr2.sasknet.sk.ca> for flyrotary@lancaironline.net; Sun, 09 Jul 2006 18:44:33 -0600 (CST) Date: Sun, 09 Jul 2006 18:46:34 -0600 From: Jarrett & Heidi Johnson Subject: Re: [FlyRotary] Re: Nothing to do with Rotary Engines, but.... To: Rotary motors in aircraft Message-id: <000d01c6a3ba$4b473440$6401a8c0@home> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Mailer: Microsoft Outlook Express 6.00.2900.2869 Content-type: multipart/alternative; boundary="Boundary_(ID_2QvMTDukIR+WLFKri8V9Gg)" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. --Boundary_(ID_2QvMTDukIR+WLFKri8V9Gg) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT What I was alluding to is the Fact that gas engines produce torque during a smaller portion of the 360 degree rotation. An electric motor on the other hand puts out torque for 360 degrees. Hence when using an electric motor to drive for instance, a pump; instead of a 4hp gas engine one can use approximately a 2 hp and get the same pumping efficiency - like amount of water moved. I think I came across the formula in an old Grainger catalog but it isn't in the one I have now. FWI Wendell ( I'll disregard the donkey crap statement for the donkey) Wendell, Actually it depends on the elect. motor as well. If its DC then there is continuous torque put out, but if its a single phase standard 1800 rpm motor.. it only puts out torque for 1/2 a rev. If its a 3 phase motor its nearly back to 360 deg torque due to it changing phases. However at the end of the day.. it still has to raise the lb's so many feet to be 1 hp. As far as the donkey comment.. I was just trying to inject a little humor into a rather dry subject.. no offense intended. My appologies if any was taken. Jarrett --Boundary_(ID_2QvMTDukIR+WLFKri8V9Gg) Content-type: text/html; charset=iso-8859-1 Content-transfer-encoding: 7BIT

What I was alluding to is the Fact that gas engines produce torque during a smaller portion of the 360 degree rotation. An electric motor on the other hand puts out torque for 360 degrees. Hence when using an electric motor to drive for instance, a pump; instead of a 4hp gas engine one can use approximately a 2 hp and get the same pumping efficiency - like amount of water moved. I think I came across the formula in an old Grainger catalog but it isn't in the one I have now. FWI

Wendell ( I'll disregard the donkey crap statement for the donkey)

Wendell, Actually it depends on the elect. motor as well. If its DC then there is continuous torque put out, but if its a single phase standard 1800 rpm motor.. it only puts out torque for 1/2 a rev. If its a 3 phase motor its nearly back to 360 deg torque due to it changing phases. However at the end of the day.. it still has to raise the lb's so many feet to be 1 hp.

As far as the donkey comment.. I was just trying to inject a little humor into a rather dry subject.. no offense intended. My appologies if any was taken.

Jarrett

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