Return-Path: Received: from out007.verizon.net ([206.46.170.107] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2952356 for flyrotary@lancaironline.net; Tue, 27 Jan 2004 22:58:20 -0500 Received: from netzero.net ([4.12.145.173]) by out007.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20040128035820.UVID13340.out007.verizon.net@netzero.net> for ; Tue, 27 Jan 2004 21:58:20 -0600 Message-ID: <40173357.4050608@netzero.net> Date: Tue, 27 Jan 2004 22:58:15 -0500 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Exhaust porting References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080207060807080406070809" X-Authentication-Info: Submitted using SMTP AUTH at out007.verizon.net from [4.12.145.173] at Tue, 27 Jan 2004 21:58:20 -0600 This is a multi-part message in MIME format. --------------080207060807080406070809 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Tracy Crook wrote: >>Ok, so I finally took my spare engine apart (that I've had sitting in my >>garage from before I ever had my airplane flying). >> >>Rotor housings seem to be in a lot better shape then in my running >>engine. Which brings me to my question: >> >>Is any exhaust porting recommended? >> >>This is a 1986 13B NA. On my running engine I expanded the exhaust ports >>as much as the steel sleeves allowed. >> >>Finn >> >> > >I would not mess with the exhaust ports unless you REALLY know what you are >doing. I fully admit that I do not when it comes to exhaust porting, but I >don't think there is much to be gained at 6000 rpm or less. > >Tracy Crook > Thanks Tracy. Well, I might need to go up to 6,500 rpm to get above 210 mph (eventually, with reduced cooling drag and tuned intake and exhaust). Any other bids? Leon? Finn --------------080207060807080406070809 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Tracy Crook wrote:
Ok, so I finally took my spare engine apart (that I've had sitting in my
garage from before I ever had my airplane flying).

Rotor housings seem to be in a lot better shape then in my running
engine. Which brings me to my question:

Is any exhaust porting recommended?

This is a 1986 13B NA. On my running engine I expanded the exhaust ports
as much as the steel sleeves allowed.

Finn
    

I would not mess with the exhaust ports unless you REALLY know what you are
doing.   I fully admit that I do not when it comes to exhaust porting, but I
don't think there is much to be gained at 6000 rpm or less.

Tracy Crook

Thanks Tracy.

Well, I might need to go up to 6,500 rpm to get above 210 mph (eventually, with reduced cooling drag and tuned intake and exhaust).

Any other bids? Leon?

Finn
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