X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 920418 for flyrotary@lancaironline.net; Sat, 30 Apr 2005 12:21:41 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.70; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf22aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050430162055.MCEW2058.imf22aec.mail.bellsouth.net@rd> for ; Sat, 30 Apr 2005 12:20:55 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Ed's new rotor housings Date: Sat, 30 Apr 2005 11:20:55 -0500 Message-ID: <000501c54da0$960fef60$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C54D76.AD39E760" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C54D76.AD39E760 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The new housings are turbo, Finn. Yes, the NA's has splitters which = reduce the noise level by 8 db according to the Mazda data I have seen. = However, I am also certain there is some power loss with the splitter given that = level of noise reduction - probably more at the higher rpms than the lower. = =20 I'm with you Ed. Someone would have to show me a dyno run where nothing = was changed but the rotor housings. Until then, I believe there has to be a power loss caused by the splitters. =20 =20 Rusty =20 ------=_NextPart_000_0006_01C54D76.AD39E760 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
The new housings are turbo, = Finn.  Yes,=20 the NA's has splitters which reduce the noise level by 8 db according to = the=20 Mazda data I have seen.  However, I am also certain there is some = power=20 loss with the splitter given that level of noise reduction - = probably=20 more at the higher rpms than the lower.    
 
I'm with you Ed.  Someone would have to = show me a dyno=20 run where nothing was changed but the rotor housings.  Until then, = I=20 believe there has to be a power loss caused by the=20 splitters.  
 
Rusty=20    
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