X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [209.149.57.228] (HELO crusader.d2.servious.org) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1001315 for flyrotary@lancaironline.net; Tue, 14 Jun 2005 00:48:33 -0400 Received-SPF: none receiver=logan.com; client-ip=209.149.57.228; envelope-from=servious@servious.org Received: from shaker (shaker [10.0.0.100]) (authenticated bits=0) by crusader.d2.servious.org (8.13.4/8.13.4) with ESMTP id j5E4hDSL061820 for ; Mon, 13 Jun 2005 23:43:14 -0500 (CDT) Message-Id: <200506140443.j5E4hDSL061820@crusader.d2.servious.org> From: "Jonathan Crawford" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: normalized supercharger? Date: Mon, 13 Jun 2005 23:49:37 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_02BC_01C57072.8EF80A10" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: thread-index: AcVwQLb6P2gCly+nRt+Eef6aPlF+1AAWaygg This is a multi-part message in MIME format. ------=_NextPart_000_02BC_01C57072.8EF80A10 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Thomas, No doubt they both have tight internal clearances, but Eatons seem to be more resiliant when it comes to case flex than Whipple style chargers. From the Eatons (M45 and M62) that I have held, I would guess the weight to be in the 25lbs range plus bracketing, I have not ever picked up a Whipple, nor would it be a direct comparison since the smallest whipple does 1.2L/rev displacement, where as the M62 does 1.0L/rev. All in all you would probably be a little heavier than a turbocharger setup due to the added brackets... plus you would want mufflers which you do not have to have with turbocharged engines. Now on the other hand... if you want to talk about noise... an Eaton will scream like a banshee when you get the engine up to speed, a Whipple is a little more tame in its banshee qualities. Jonathan _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of rijakits Sent: Monday, June 13, 2005 12:57 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: normalized supercharger? Jonathan, I never had either charger in my hands, but the system seems to be about the same. Eaton having bigger rotors, but it also must keep tolerances very accurately or you get the same "failure mode" you wanted to avoid. Do you have any idea about weights between these two? ------=_NextPart_000_02BC_01C57072.8EF80A10 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Thomas,
 
No doubt they both have tight internal = clearances, but=20 Eatons seem to be more resiliant when it comes to case flex than Whipple = style=20 chargers. From the Eatons (M45 and M62) that I have held, I would = guess the=20 weight to be in the 25lbs range plus bracketing, I have=20 not ever picked up a Whipple, nor would it be a direct = comparison=20 since the smallest whipple does 1.2L/rev displacement, where as the M62 = does=20 1.0L/rev. All in all you would probably be a little heavier than a=20 turbocharger setup due to the added brackets... plus you would want = mufflers=20 which you do not have to have with turbocharged engines. Now on the = other=20 hand... if you want to talk about noise... an Eaton will scream like a = banshee=20 when you get the engine up to speed, a Whipple is a little more tame in = its=20 banshee qualities.
 
Jonathan
 
From: = Rotary motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of=20 rijakits
Sent: Monday, June 13, 2005 12:57 = PM
To: Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: normalized = supercharger?=20

Jonathan,
I never had either charger in my hands, but the = system=20 seems to be about the same.
Eaton having bigger rotors, but it also must = keep=20 tolerances very accurately or you get the same "failure mode" you wanted = to=20 avoid.
Do you have any idea about weights between these = two?
 
 
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