X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 16 Oct 2013 13:06:41 -0400 Message-ID: X-Original-Return-Path: Received: from mail-pa0-f42.google.com ([209.85.220.42] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTPS id 6543158 for lml@lancaironline.net; Wed, 16 Oct 2013 12:20:57 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.42; envelope-from=pjdmiller@gmail.com Received: by mail-pa0-f42.google.com with SMTP id kx10so1295532pab.29 for ; Wed, 16 Oct 2013 09:20:20 -0700 (PDT) X-Received: by 10.68.233.168 with SMTP id tx8mr893490pbc.203.1381940420309; Wed, 16 Oct 2013 09:20:20 -0700 (PDT) X-Original-Return-Path: Received: from [192.168.1.135] (S010620aa4b008706.cg.shawcable.net. [174.0.112.194]) by mx.google.com with ESMTPSA id q4sm92141894pba.12.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 16 Oct 2013 09:20:19 -0700 (PDT) From: Paul Miller Content-Type: multipart/alternative; boundary="Apple-Mail=_D24E8F46-C6F5-45A7-8F05-7585E5468ACC" X-Original-Message-Id: <2DDA5AF9-17EA-4858-B455-CB58C5A71E5B@gmail.com> Mime-Version: 1.0 (Mac OS X Mail 6.5 \(1508\)) Subject: Re: [LML] Removing vacuum pump? X-Original-Date: Wed, 16 Oct 2013 10:20:12 -0600 References:

X-Original-To: Lancair Mailing List In-Reply-To: X-Mailer: Apple Mail (2.1508) --Apple-Mail=_D24E8F46-C6F5-45A7-8F05-7585E5468ACC Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 Correcting my earlier message, the turbine and twins do have check = valves in the pressurization system. On this SIMCOM diagram, the check = valve on the TBM system is at the very bottom of the page just before = entering the cabin. When I check the manuals for the piston twins = there were actually six check valves to protect against engine failures = and so forth so I was dead wrong on both counts. I searched for schematics of the Dukes outflow system, never did see = anything online. For comparison, this schematic is also from the = Simcom TBM book and shows the dual outflows (one is soley for safety) = and both are completely vacuum controlled. The squat switch and dump = switch activate a solenoid that applies vacuum so there are no = electrical parts in the outflow valve itself. The Garrett controller = is really just a VSI gauge when you examine the schematic. I find these schematics useful for training and review. Thanks for explaining how the Dukes system works with the electric = motor.= --Apple-Mail=_D24E8F46-C6F5-45A7-8F05-7585E5468ACC Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1 Correcting my earlier message, = the turbine and twins do have check valves in the pressurization system. = On this SIMCOM = diagram, the check valve on the TBM system is at the very bottom of the = page just before entering the cabin. When I check the manuals for = the piston twins there were actually six check valves to protect against = engine failures and so forth so I was dead wrong on both = counts.

I searched for schematics of the Dukes = outflow system, never did see anything online. For comparison, = this schematic is = also from the Simcom TBM book and shows the dual outflows (one is soley = for safety) and both are completely vacuum controlled. The squat = switch and dump switch activate a solenoid that applies vacuum so there = are no electrical parts in the outflow valve itself. The Garrett = controller is really just a VSI gauge when you examine the = schematic.

I find these schematics useful for = training and review.

Thanks for explaining how = the Dukes system works with the electric motor.

= --Apple-Mail=_D24E8F46-C6F5-45A7-8F05-7585E5468ACC--