X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-ma05.mx.aol.com ([64.12.100.31] verified) by logan.com (CommuniGate Pro SMTP 5.4c2a) with ESMTP id 4832347 for flyrotary@lancaironline.net; Mon, 31 Jan 2011 07:54:23 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.100.31; envelope-from=Lehanover@aol.com Received: from imo-ma04.mx.aol.com (imo-ma04.mx.aol.com [64.12.78.139]) by imr-ma05.mx.aol.com (8.14.1/8.14.1) with ESMTP id p0VCreoZ023722 for ; Mon, 31 Jan 2011 07:53:40 -0500 Received: from Lehanover@aol.com by imo-ma04.mx.aol.com (mail_out_v42.9.) id q.d41.5b3bab0a (55725) for ; Mon, 31 Jan 2011 07:53:36 -0500 (EST) Received: from magic-m25.mail.aol.com (magic-m25.mail.aol.com [172.20.22.198]) by cia-md02.mx.aol.com (v129.8) with ESMTP id MAILCIAMD028-d9ad4d46b0d025c; Mon, 31 Jan 2011 07:53:36 -0500 From: Lehanover@aol.com Message-ID: <5271a.318aa582.3a780ad0@aol.com> Date: Mon, 31 Jan 2011 07:53:36 EST Subject: Re: [FlyRotary] Re: Back up air turbine To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_5271a.318aa582.3a780ad0_boundary" X-Mailer: 9.0 Security Edition for Windows sub 5382 X-AOL-IP: 72.187.199.116 X-Spam-Flag:NO X-AOL-SENDER: Lehanover@aol.com --part1_5271a.318aa582.3a780ad0_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 1/31/2011 2:50:16 A.M. Eastern Standard Time, gregw@onestopdesign.biz writes: Not to mention Ice, drag, exposed wiring, not that many amps, and being a tad bit overpriced. Greg Ward Legacy 20B, N178RG Still around and in progress...... ----- Original Message ----- From: "Ernest Christley" To: "Rotary motors in aircraft" Sent: Sunday, January 30, 2011 7:37 PM Subject: [FlyRotary] Re: Back up air turbine I use model airplane electric motors that cost under $30.00. They are rated at 50 amps with burst current to 60 amps. The shaft fits a wide selection of propellers a $4.00 each. They are brushless so nearly no electrical noise and the windings are fixed. The outer case has rows of very powerful magnets that spin in ball bearings around the wound pole pieces. _http://www.hobbypartz.com/monsterpower-46--670kv--outrunner-brushless-motor .html_ (http://www.hobbypartz.com/monsterpower-46--670kv--outrunner-brushless-motor.html) This is the size I use and this will pull a 7 pound model very well. The KV rating is actually how many revs you get for each volt applied. Model builders around the world have performed billions of hours life tests including deep dive shock testing into the earth, and these things hold up. Originally designed as disc drive power for every computer, which has to be electrically noise free (no brush arcing). Weight is 12 ozs. Lynn E. Hanover --part1_5271a.318aa582.3a780ad0_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 1/31/2011 2:50:16 A.M. Eastern Standard Time,=20 gregw@onestopdesign.biz writes:
Not to=20 mention Ice, drag, exposed wiring, not that many amps, and being a
t= ad bit=20 overpriced.
Greg Ward
Legacy 20B, N178RG Still around and in=20 progress......

----- Original Message -----
From: "Ernest=20 Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraf= t"=20 <flyrotary@lancaironline.net>
Sent: Sunday, January 30, 2011 7:= 37=20 PM
Subject: [FlyRotary] Re: Back up air=20 turbine

 
 
I use model airplane electric motors that cost under $30.00. They are= rated=20 at 50 amps with burst current to
60 amps. The shaft fits a wide selection of propellers a $4.00 each.= They=20 are brushless so nearly no electrical noise and the windings are fixed. Th= e=20 outer case has rows of very powerful magnets that spin in ball bearings ar= ound=20 the wound pole pieces.
 
 
This is the size I use and this will pull a 7 pound model very well.=
 
The KV rating is actually how many revs you get for each volt applied= .=20
 
Model builders around the world have performed billions of hours life= tests=20 including deep dive shock testing into
the earth, and these things hold up. Originally designed as disc driv= e=20 power for every computer, which has to be electrically noise free (no brus= h=20 arcing).
Weight is 12 ozs.
 
Lynn E. Hanover 
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