X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 11 Mar 2008 10:32:28 -0400 Message-ID: X-Original-Return-Path: Received: from web55703.mail.re3.yahoo.com ([216.252.110.34] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with SMTP id 2786107 for lml@lancaironline.net; Mon, 10 Mar 2008 21:12:59 -0400 Received: (qmail 38364 invoked by uid 60001); 11 Mar 2008 01:12:57 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=D14v1923GkM5GIgPxOTt4mLHn68x6z3ypRleXVoFn47C7egiu7BvkceHvLM5CHoMPZqcOuX6ak3jroWFOwWxDPOxOuDU9QtPXe2uJ2q+jjakzM6OMhM9U1tp2tRoqV0xYfJcN5eCdZwFpB1uftyhcHUWJ7KA+DG6KmCnDz4XBe8=; X-YMail-OSG: n6rzSfcVM1mzTc6t96vLxJ9FoSAyhxIetCnrDchXAYFsCPzYIwFJ7RH_aZ8nfOTtWtlA3vsdHOdFipJhdJ6xnPEw6xdwp4._Ym9IKrSrwHr3vkaKWcmqrvoko.o6JZ59f4Cba1fYIay5eLMKjAeAgw-- Received: from [71.31.138.160] by web55703.mail.re3.yahoo.com via HTTP; Mon, 10 Mar 2008 18:12:57 PDT X-Mailer: YahooMailRC/902.35 YahooMailWebService/0.7.185 X-Original-Date: Mon, 10 Mar 2008 18:12:57 -0700 (PDT) From: J H Webb Subject: Re: [LML] Re: Sonic Venturi Orientation on TSIO-550 X-Original-To: Lancair Mailing List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1082072726-1205197977=:38087" X-Original-Message-ID: <802723.38087.qm@web55703.mail.re3.yahoo.com> --0-1082072726-1205197977=:38087 Content-Type: text/plain; charset=us-ascii Barry, The sonic nozzle is a device to restrict the flow of air drawn from the engine compressor output to a certain number of pounds of air per second. The standing shock wave in the nozzle limits the flow when the flow gets fast enough to form a shock wave. That said you should be looking a a convergent divergent interior to the nozzle. It narrows down more abruptly on the inlet side and more gradually on the outlet side. If it opens up you can have unacceptable flow separation and more noise and efficiency loss. Look for more gradual slope in the nozzle and that is the outlet side. Jack Webb L360, LIV Paulding, Ohio Re: Sonic Venturi Orientation on TSIO-550 Posted for "F. Barry Knotts" : Lancairian engine persons...I have a question. (Several, actually.) I acquired a 7 year old, never run, Continental TSIO-550 that had been prepared by Lancair with the complete firewall forward fastbuild treatment. ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping --0-1082072726-1205197977=:38087 Content-Type: text/html; charset=us-ascii

Barry,

The sonic nozzle is a device to restrict the flow of air drawn from the engine compressor output to a certain number of pounds of air per second. The standing shock wave in the nozzle limits the flow when the flow gets fast enough to form a shock wave. That said you should be looking a a convergent divergent interior to the nozzle. It narrows down more abruptly on the inlet side and more gradually on the outlet side. If it opens up you can have unacceptable flow separation and more noise and efficiency loss. Look for more gradual slope in the nozzle and that is the outlet side.

Jack Webb

L360, LIV

Paulding, Ohio

Re: Sonic Venturi Orientation on TSIO-550

Posted for "F. Barry Knotts" <bknotts@buckeye-express.com>:

Lancairian engine persons...I have a question. (Several, actually.)

I acquired a 7 year old, never run, Continental TSIO-550 that had been
prepared by Lancair with the complete firewall forward fastbuild treatment.

Looking for last minute shopping deals? Find them fast with Yahoo! Search. --0-1082072726-1205197977=:38087--