X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 31 May 2007 13:43:29 -0400 Message-ID: X-Original-Return-Path: Received: from mtai05.charter.net ([209.225.8.185] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2077078 for lml@lancaironline.net; Thu, 31 May 2007 13:05:50 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.225.8.185; envelope-from=farnsworth@charter.net Received: from aa08.charter.net ([10.20.200.160]) by mtai05.charter.net (InterMail vM.7.08.02.00 201-2186-121-20061213) with ESMTP id <20070531170504.OFAK1566.mtai05.charter.net@aa08.charter.net> for ; Thu, 31 May 2007 13:05:04 -0400 Received: from karen473fcf455 ([75.139.140.126]) by aa08.charter.net with ESMTP id <20070531170504.FGMH24109.aa08.charter.net@karen473fcf455> for ; Thu, 31 May 2007 13:05:04 -0400 From: "Farnsworth" X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Re: Sonic Valves X-Original-Date: Thu, 31 May 2007 13:05:06 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0080_01C7A384.4F75A8B0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-reply-to: X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 Thread-index: AcejmUXRUucyivN2QemIBDjiFSGGPgACssWA X-Original-Message-Id: <20070531170504.FGMH24109.aa08.charter.net@karen473fcf455> X-Chzlrs: 0 This is a multi-part message in MIME format. ------=_NextPart_000_0080_01C7A384.4F75A8B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Rick / Craig, I have not had any compressor stalls with the turbos on my aircraft. However, I don't fly above FL 180 either. I don't use any special procedures for power reduction, but my normal power reduction for descent from altitude is a stair step procedure. That is, I start down, reduce 2 or 3 inches of MP, continue the descent a bit then pull off a couple of more inches of MP. Lynn Farnsworth _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Craig Berland Sent: Thursday, May 31, 2007 11:35 AM To: lml@lancaironline.net Subject: [LML] Re: Sonic Valves Rick, hopefully someone like Lynn Farnsworth will comment. I have a IV-P that is not done/not flying. The input I forwarded came from when I designed and machined new intercooler "end caps" for some new intercoolers I decided to use. The input I got at that time was...Machine the boss but don't drill the sonic port hole in the angled end cap because the end caps could be used in the Super Legacy. I am very "engine" knowledgeable but I am NOT a turbo expert. Frankly, just the opposite. It is possible the input I received was aimed at the Reno racers. Craig Berland Craig, Thanks for the info! Some follow-up questions... Who set up your engine? Lancair? Did you (they) get any "official" input from TCM? Is there anything different in the waste gate (slope) controller or turbos? Do you have any special power reduction procedures? (i.e. reducing MP slowly to let Upper Deck Pressure bleed off) Do you have much experience with it up high (i.e. 25,000 ft)? Perhaps the banter regarding compressor stalls with the sonic nozzles plugged is OWT (Old Wise Tale). However, know of several straight IV's (non-P) that still have sonic nozzles because they were told they needed them??? Rick ------=_NextPart_000_0080_01C7A384.4F75A8B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable [LML] Re: Sonic Valves

Rick / = Craig,

 

I have not had any compressor = stalls with the turbos on my aircraft. However, I don’t fly above FL 180 = either. I don’t use any special procedures for power reduction, but my = normal power reduction for descent from altitude is a stair step procedure. That is, = I start down, reduce 2 or 3 inches of MP, continue the descent a bit then pull = off a couple of more inches of MP.

 

Lynn = Farnsworth

From: = Lancair Mailing List = [mailto:lml@lancaironline.net] On Behalf Of Craig Berland
Sent: Thursday, May 31, = 2007 11:35 AM
To: = lml@lancaironline.net
Subject: [LML] Re: Sonic = Valves

 

 

Rick, hopefully someone like Lynn Farnsworth will comment.  I  have a IV-P that is not done/not flying.  = The input I forwarded came from when I designed and machined new intercooler = "end caps" for some new intercoolers I decided to use.  The input I = got at that time was…..Machine the boss but don't drill the sonic port = hole in the angled end cap because the end caps could be used in the Super Legacy.  I am very "engine" knowledgeable but I am NOT a = turbo expert.  Frankly, just the opposite.  It is possible the input = I received was aimed at the Reno racers.

Craig Berland

Craig,
Thanks for the info!  Some follow-up questions... =

Who set up your engine?  Lancair?  Did you (they) get any "official" input from TCM?  Is there anything different = in the waste gate (slope) controller or turbos?

Do you have any special power reduction procedures? (i.e. reducing MP = slowly to let Upper Deck Pressure bleed off)

Do you have much experience with it up high (i.e. 25,000 ft)? =

Perhaps the banter regarding compressor stalls with the sonic nozzles plugged is = OWT (Old Wise Tale).  However, know of several straight = IV's

(non-P) that still have sonic nozzles because they were told they needed = them???

Rick

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