X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 920348 for flyrotary@lancaironline.net; Sat, 30 Apr 2005 10:44:37 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-189-178.carolina.res.rr.com [24.74.189.178]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j3UEhl0W006396 for ; Sat, 30 Apr 2005 10:43:48 -0400 (EDT) Message-ID: <001301c54d93$25cd7400$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Ed's new rotor housings Date: Sat, 30 Apr 2005 10:44:43 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C54D71.9E877D90" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0010_01C54D71.9E877D90 Content-Type: text/plain; charset="iso-8859-1" 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. In any case, since I ported the secondaries - decided = that going with an NA housing would just put more of a restriction on = the gas flow when I was porting to get more gas flow. I don't have any real data to back up my assertions about power = reduction - just my intuition. Ed ----- Original Message -----=20 From: Finn Lassen=20 To: Rotary motors in aircraft=20 Sent: Saturday, April 30, 2005 10:31 AM Subject: [FlyRotary] Ed's new rotor housings Hi Ed, I missed one point. Are the new housings NA or turbo? If turbo, why? The NA are supposedly more quiet due to the splitters. Finn Ed Anderson wrote: The exhaust note is deeper and with a sharper bark - may be the = result of better sealing. ------=_NextPart_000_0010_01C54D71.9E877D90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
The new housings are turbo, Finn.  = Yes, the=20 NA's has splitters which reduce the noise level by 8 db according to the = Mazda=20 data I have seen.  However, I am also certain there is some power = loss with=20 the splitter given that level of noise reduction - probably = more at=20 the higher rpms than the lower.   In any case, since I ported = the=20 secondaries - decided that going with an NA housing would just put more = of a=20 restriction on the gas flow when I was porting to get more gas=20 flow.
 
I don't have any real data to back up = my assertions=20 about power reduction - just my intuition.
 
Ed
----- Original Message -----
From:=20 Finn=20 Lassen
Sent: Saturday, April 30, 2005 = 10:31=20 AM
Subject: [FlyRotary] Ed's new = rotor=20 housings

Hi Ed, I missed one point. Are the new housings NA or=20 turbo?

If turbo, why? The NA are supposedly more quiet due to = the=20 splitters.

Finn

Ed Anderson wrote:
The exhaust note is deeper and with = a sharper=20 bark - may be the result of better sealing.
 
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