X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [206.46.252.44] (HELO vms044pub.verizon.net) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 921071 for flyrotary@lancaironline.net; Sun, 01 May 2005 00:26:58 -0400 Received: from verizon.net ([71.99.156.55]) by vms044.mailsrvcs.net (Sun Java System Messaging Server 6.2 HotFix 0.04 (built Dec 24 2004)) with ESMTPA id <0IFS00LFEN0X45B0@vms044.mailsrvcs.net> for flyrotary@lancaironline.net; Sat, 30 Apr 2005 23:26:58 -0500 (CDT) Date: Sun, 01 May 2005 00:26:56 -0400 From: Finn Lassen Subject: Re: [FlyRotary] Re: Ed's new rotor housings In-reply-to: To: Rotary motors in aircraft Message-id: <42745A90.7080502@verizon.net> MIME-version: 1.0 Content-type: multipart/alternative; boundary=------------020308050501020802040706 X-Accept-Language: en-us, en References: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) This is a multi-part message in MIME format. --------------020308050501020802040706 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sure, sound power! :) Finn Russell Duffy wrote: > 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. > > 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. > > Rusty --------------020308050501020802040706 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Sure, sound power! :)

Finn

Russell Duffy wrote:

Message
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.

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.

Rusty

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