X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from elasmtp-galgo.atl.sa.earthlink.net ([209.86.89.61] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2041940 for flyrotary@lancaironline.net; Sun, 13 May 2007 09:36:25 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.61; envelope-from=jerryhey@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=gZZohYQRUKsH3YN1Z9cGaPcy0/mmNYdH+T1eVjgin8VkXOYTOsQR73+XK6Aksvcr; h=Received:Mime-Version:In-Reply-To:References:Content-Type:Message-Id:From:Subject:Date:To:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [71.49.146.183] (helo=[192.168.0.101]) by elasmtp-galgo.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1HnEEm-0001nk-5d for flyrotary@lancaironline.net; Sun, 13 May 2007 09:35:48 -0400 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1-1040171895 Message-Id: <03B643A4-C289-4BFC-9BD0-1CE9BB028E71@earthlink.net> From: Jerry Hey Subject: Re: [FlyRotary] Re: Exhaust insert Date: Sun, 13 May 2007 09:35:51 -0400 To: "Rotary motors in aircraft" X-Mailer: Apple Mail (2.752.3) X-ELNK-Trace: 8104856d7830ec6b1aa676d7e74259b7b3291a7d08dfec791058afc0690d86f517dca110881a7afc350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 71.49.146.183 --Apple-Mail-1-1040171895 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed I have always thought the 13B exhaust ports including splitters were for plenty large for 7500 rpm. Judging by other's experiences, even the convoluted path of the Renensis exhaust is sufficient in stock form for our rpms. Jerry On May 13, 2007, at 9:23 AM, Ed Anderson wrote: > Joe, I have read articles that indicates the insert is indeed made > of very tough material - would just about have to be, to live in > that environment. Stories I have read indicated you could (with > considerable effort and carbide bit tools) grind out the insert. > > However, I would suggest that you could save yourself a lot of > effort by using turbo housings. I have ported in intakes, but > shied away from trying to port the exhaust as that is where the > apex seal encounters its toughest test - Hot exhaust gases across > it and little support as the normally supporting rotor housing wall > is of course missing at the exhaust port. > > But that is just my 0.02 worth > > Ed > ----- Original Message ----- > From: Joe Berki > To: Rotary motors in aircraft > Sent: Sunday, May 13, 2007 8:31 AM > Subject: [FlyRotary] Exhaust insert > > What type of material is the insert for the exhaust port found in > the 2nd gen motors made from? Is it removable? How could one > enlarge the exhaust port? Do you just use a turbo housing? Thanks > > Joe Berki > Jerry Hey STOL 701 --Apple-Mail-1-1040171895 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 I have always thought the 13B = exhaust ports including splitters=A0 were for plenty large for 7500 rpm. = Judging by other's experiences, even the convoluted=A0 path of the = Renensis exhaust is sufficient in stock form for our rpms. =A0 = =A0Jerry


=A0
On May 13, = 2007, at 9:23 AM, Ed Anderson wrote:

Joe, I have read articles that indicates the insert is indeed = made of very tough material - would just about have to be, to live in = that environment.=A0 Stories I have read indicated you could (with = considerable effort and carbide bit tools) grind out the = insert.
=A0
However, I = would suggest that you could save yourself a lot of effort by using = turbo housings.=A0 I have ported in intakes, but shied away from trying = to port the exhaust as that is where the apex seal encounters its = toughest test - Hot exhaust gases across it and little support as the = normally supporting rotor housing wall is of course missing at the = exhaust port.
=A0
But that is = just my 0.02 worth
=A0
----- Original = Message -----
Sent: Sunday, May 13, 2007 8:31 AM
Subject: [FlyRotary] Exhaust = insert

What type of material is the insert for the exhaust = port found in the 2nd gen motors made from?=A0 Is it removable?=A0 How = could one enlarge the exhaust port?=A0 Do you just use a turbo housing?=A0= Thanks
=A0

=
Jerry Hey STOL = 701


 =

= --Apple-Mail-1-1040171895--