X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 16 Dec 2011 09:44:58 -0500 Message-ID: X-Original-Return-Path: Received: from carbinge.com ([69.5.27.218] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with SMTP id 5306790 for lml@lancaironline.net; Thu, 15 Dec 2011 18:14:39 -0500 Received-SPF: none receiver=logan.com; client-ip=69.5.27.218; envelope-from=jbarrett@carbinge.com Received: (qmail 10989 invoked from network); 15 Dec 2011 23:14:05 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; h=X-Originating-IP:Reply-To:From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:Content-Language; s=default; d=carbinge.com; b=GScw+zDQz7PR2mB0egY79pJ2l/OCq2P3/S7ZoG+Fb0nt/N0Aq8Va25UDjvTNXAeiNvrCBDrsPRQcXDcvm+wqNiD/u6/dFH64K+d93yW4/807OKOfXQ4ei+YYeyIVYK2DQ/9qy8R1srmwiSuAg1wPPtXUJT/of4Oh6bKUqZhbcN8=; X-Originating-IP: [24.143.115.170] Reply-To: From: "John Barrett" X-Original-To: "'Lancair Mailing List'" Subject: MGL back up instrumentr X-Original-Date: Thu, 15 Dec 2011 15:14:21 -0800 X-Original-Message-ID: <005d01ccbb7f$47f040b0$d7d0c210$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005E_01CCBB3C.39CD00B0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Acy7f0dCBD4CYO+uR4umRljGJvSwyw== Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_005E_01CCBB3C.39CD00B0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Infinity line MGL instruments - they are intriguing as back up gauges. Looks like the altimeter is Baro sensitive for input but needs electrons for output. I spoke with Matt at their US distributor center and learned that it uses pitot static inputs to pressure sensors that generate output data for microprocessor to turn into altitude readout. Without electricity the gauge does not function, losing the microprocessing component as well as the LCD display output. Does this mean that in order to have good backup one would need to have a totally mechanical altimeter? Have found that two of my cheap 2.25" gauges are failed with case leaks. Have had them awhile but as far as I know they haven't been mishandled. I know the airspeed gauge is UMA. I suspect the altimeter is the same brand. These are the two failed instruments. Advice welcome. John Barrett Regards, John Barrett, CEO Leading Edge Composites PO Box 428 Port Hadlock, WA 98339 www.carbinge.com ------=_NextPart_000_005E_01CCBB3C.39CD00B0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Infinity = line MGL instruments – they are intriguing as back up = gauges.

Looks like = the altimeter is Baro sensitive for input but needs electrons for = output. I spoke with Matt at their US distributor center and = learned that it uses pitot static inputs to pressure sensors that = generate output data for microprocessor to turn into altitude = readout.

Without = electricity the gauge does not function, losing the microprocessing = component as well as the LCD display output. Does this mean that = in order to have good backup one would need to have a totally = mechanical altimeter?

Have found = that two of my cheap 2.25” gauges are failed with case = leaks. Have had them awhile but as far as I know they = haven’t been mishandled. I know the airspeed gauge is = UMA. I suspect the altimeter is the same brand. These = are the two failed instruments.

Advice = welcome.

John Barrett

Regards,

John = Barrett, CEO

Leading Edge = Composites

PO Box = 428

Port Hadlock, WA = 98339

www.carbinge.com

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