X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from bay0-omc2-s16.bay0.hotmail.com ([65.54.246.152] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1227469 for flyrotary@lancaironline.net; Fri, 07 Jul 2006 10:59:55 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.152; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.82]) by bay0-omc2-s16.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830); Fri, 7 Jul 2006 07:58:58 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 7 Jul 2006 07:58:58 -0700 Message-ID: Received: from 4.171.150.205 by BAY115-DAV10.phx.gbl with DAV; Fri, 07 Jul 2006 14:58:55 +0000 X-Originating-IP: [4.171.150.205] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Dreded EM2 mandatory update Date: Fri, 7 Jul 2006 10:58:50 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0050_01C6A1B4.5463CE10" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.20.0029.3000 Seal-Send-Time: Fri, 7 Jul 2006 10:58:50 -0400 X-OriginalArrivalTime: 07 Jul 2006 14:58:58.0210 (UTC) FILETIME=[DFD63020:01C6A1D5] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_0050_01C6A1B4.5463CE10 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To All single part EM2 users:=20 I just identified a problem which causes radio noise in some = installations. There was a high frequency bypass capacitor left off the single piece = version of EM2. There should be a .33 uF 50vdc part (low series = inductance type, not electrolytic) from the +12v input line to ground = near the switching regulator chip. Don't know why I don't hear that = much radio noise on the bench and in some completed installations but = the noise on the +12 volt line is obvious.=20 Sorry for the inconvenience but send the unit back and I'll fix it. No = charge of course. Tracy Crook, RWS ----- Original Message -----=20 From: Bill Dube=20 To: Rotary motors in aircraft=20 Sent: Thursday, July 06, 2006 7:16 PM Subject: [FlyRotary] Re: Nothing to do with Rotary Engines, but.... It is all about duty cycle and cooling. The motors in my electric drag bike are rated at just 13 HP each, = continuous duty. I run 170 HP through each for just a few seconds.=20 Bill Dube' Bob White wrote:=20 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/ =20 ------=_NextPart_000_0050_01C6A1B4.5463CE10 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
To All single part EM2 users: 
 
I just identified a problem which causes radio noise in some=20 installations.
 
There was a high frequency bypass capacitor left off the single = piece=20 version of EM2.  There should be a .33 uF 50vdc part (low series = inductance=20 type, not electrolytic) from the +12v  input line to ground near = the=20 switching regulator chip.  Don't know why I don't hear that much = radio=20 noise on the bench and in some completed installations but the = noise on the=20 +12 volt line is obvious. 
 
Sorry for the inconvenience but send the unit back and I'll = fix=20 it.  No charge of course.
 
Tracy Crook,   RWS
----- Original Message -----
From: Bill Dube
To: Rotary motors in = aircraft
Sent: Thursday, July 06, 2006 = 7:16=20 PM
Subject: [FlyRotary] Re: = Nothing to do=20 with Rotary Engines, but....

It is all about duty cycle and cooling.

The = motors in my=20 electric drag bike are rated at just 13 HP each, continuous duty. I = run 170 HP=20 through each for just a few seconds.

Bill Dube'

Bob = White=20 wrote:=20 
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://ww=
w.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" <lendich@optusnet.com.au> 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)



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