X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.2.2) with ESMTP id 2891146 for flyrotary@lancaironline.net; Fri, 02 May 2008 22:14:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Received: from edward2 ([75.191.186.236]) by cdptpa-omta05.mail.rr.com with SMTP id <20080503021403.DNBQ720.cdptpa-omta05.mail.rr.com@edward2> for ; Sat, 3 May 2008 02:14:03 +0000 Message-ID: <000701c8acc3$5f7e6be0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Rotor Housings Date: Fri, 2 May 2008 22:14:09 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C8ACA1.D827AC90" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C8ACA1.D827AC90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mazdatrix offers new rotor housings one for an 89-92 N/A Front housing = will run you $571.90 They also have the rear housing as well. http://www.mazdatrix.com/getprice.asp?partnum=3D10-B10A-N350 I have a paper which showed that the exhaust splitters reduce the noise = energy by 8 DB - a considerable amount. The fact that it did reduce the = noise level by that much was cause for the conclusion by a number of = folks that using a turbo housing without the obstruction to exhaust flow = would result in more power. So, Joe, I guess my question is if you are willing to go to the cost and = effort to produce a PP (for more power presumably) then why would you = be willing to give up power by using a NA housing with a splitter. On the other hand, I am not aware of any dyno charts showing use of a = turbo and N/A housing and the effects on power so there may not be that = much of a difference. I just keep remember about reading that the = power output of a rotary was very sensitive to exhaust back-pressure = and have always tried to keep my exhaust system free flowing.. =20 Perhaps our list expert, Lynn, could provide some credible info on this = question. Good luck, I would like to see someone produce a PP, several have come = close, but none seem to ever end up in an aircraft. Best Regards Ed ----- Original Message -----=20 From: Joe Berki=20 To: Rotary motors in aircraft=20 Sent: Friday, May 02, 2008 9:16 PM Subject: [FlyRotary] Rotor Housings Does anyone have a set of new rotor housings for 89 to 92 13B? Where = should one look? What is a good price for them? I want to build a P = Port but I wonder if the non turbo variety would help for noise = suppression? Thanks for any help. Joe Berki Limo EZ ------=_NextPart_000_0004_01C8ACA1.D827AC90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Mazdatrix offers new rotor housings one = for an=20 89-92 N/A Front housing will run you $571.90 They also have = the rear=20 housing as well.

htt= p://www.mazdatrix.com/getprice.asp?partnum=3D10-B10A-N350

I have a paper which showed that the = exhaust=20 splitters reduce the noise energy by 8 DB - a considerable amount. = The=20 fact that it did reduce the noise level by that much was cause for the=20 conclusion by a number of folks that using a turbo housing without the=20 obstruction to exhaust flow would result in more power.

So, Joe, I guess my question is if you = are=20 willing to go to the cost and effort to produce a PP (for more power = presumably)=20 then why would you be willing to give up power by using a NA = housing with=20 a splitter.

On the other hand, I am not aware of = any dyno=20 charts showing use of a turbo and N/A housing and the effects on power = so there=20 may not be that much of a difference. I just keep remember = about=20 reading that the power output of a rotary was very sensitive to=20 exhaust back-pressure and have always tried to keep my exhaust = system free=20 flowing..

Perhaps our list expert, Lynn, could = provide some=20 credible info on this question.

Good luck, I would like to see someone = produce a=20 PP, several have come close, but none seem to ever end up in an=20 aircraft.

Best Regards

Ed

----- Original Message -----
From:=20 Joe Berki=20

To: Rotary motors in = aircraft

Sent: Friday, May 02, 2008 9:16 = PM

Subject: [FlyRotary] Rotor = Housings

Does anyone have a set of new rotor = housings for=20 89 to 92 13B? Where should one look? What is a good = price =20 for them? I want to build a P Port but I wonder if the non turbo = variety=20 would help for noise suppression? Thanks for any = help.

Joe Berki

Limo = EZ

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