X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 18 Dec 2011 09:30:01 -0500 Message-ID: X-Original-Return-Path: Received: from imr-ma06.mx.aol.com ([64.12.78.142] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with ESMTP id 5308723 for lml@lancaironline.net; Sat, 17 Dec 2011 06:55:00 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.78.142; envelope-from=vtailjeff@aol.com Received: from mtaout-da05.r1000.mx.aol.com (mtaout-da05.r1000.mx.aol.com [172.29.51.133]) by imr-ma06.mx.aol.com (8.14.1/8.14.1) with ESMTP id pBHBsKAH007756 for ; Sat, 17 Dec 2011 06:54:20 -0500 Received: from [10.44.179.184] (unknown [166.205.14.25]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by mtaout-da05.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPSA id 2129EE00008F; Sat, 17 Dec 2011 06:54:20 -0500 (EST) References: In-Reply-To: Mime-Version: 1.0 (iPhone Mail 8L1) Content-Type: multipart/alternative; boundary=Apple-Mail-16-70791856 X-Original-Message-Id: <26C073B0-C9FE-4418-8DB0-545D6195F21A@aol.com> Content-Transfer-Encoding: 7bit X-Mailer: iPhone Mail (8L1) From: Jeff Edwards Subject: Re: [LML] MGL back up instrumentr X-Original-Date: Sat, 17 Dec 2011 05:54:16 -0600 X-Original-To: Lancair Mailing List x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:486719104:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d33854eec82ec6f5d X-AOL-IP: 166.205.14.25 --Apple-Mail-16-70791856 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Why have unreliable backups?=20 AvSafe=20 Jeff Edwards 314.308.6719 mobile 636.532.5638 office Jeff.edwards@avsafe.com On Dec 16, 2011, at 8:44 AM, "John Barrett" wrote: > Infinity line MGL instruments =E2=80=93 they are intriguing as back up gau= ges.=20 >=20 > =20 >=20 > Looks like the altimeter is Baro sensitive for input but needs electrons f= or output. I spoke with Matt at their US distributor center and learned tha= t it uses pitot static inputs to pressure sensors that generate output data f= or microprocessor to turn into altitude readout.=20 >=20 > =20 >=20 > Without electricity the gauge does not function, losing the microprocessin= g 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?= >=20 > =20 >=20 > Have found that two of my cheap 2.25=E2=80=9D gauges are failed with case l= eaks. Have had them awhile but as far as I know they haven=E2=80=99t been m= ishandled. I know the airspeed gauge is UMA. I suspect the altimeter is th= e same brand. These are the two failed instruments. >=20 > =20 >=20 > Advice welcome. >=20 > =20 >=20 > John Barrett >=20 > =20 >=20 > =20 >=20 > =20 >=20 > =20 >=20 > =20 >=20 > Regards, >=20 > =20 >=20 > John Barrett, CEO >=20 > Leading Edge Composites >=20 > PO Box 428 >=20 > Port Hadlock, WA 98339 >=20 > =20 >=20 > www.carbinge.com >=20 > =20 --Apple-Mail-16-70791856 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Why have unreliable backups? 
<= br>
AvSafe 
Jeff Edwards
314.308.6719 mobile
636= .532.5638 office

On Dec 16, 2011, at 8:44 AM, "John= Barrett" <jbarrett@carbinge.com= > wrote:

Infinity line MGL instruments =E2= =80=93 they are intriguing as back up gauges. 

 

Looks like the altim= eter is Baro sensitive for input but needs electrons for output.  I spo= ke with Matt at their US distributor center and learned that it uses pitot s= tatic inputs to pressure sensors that generate output data for microprocesso= r to turn into altitude readout. 

 

Without electricity the gauge d= oes not function, losing the microprocessing component as well as the LCD di= splay output.  Does this mean that in order to have good backup one wou= ld need to have a totally  mechanical altimeter?

 

Have found that t= wo of my cheap 2.25=E2=80=9D gauges are failed with case leaks.  Have h= ad them awhile but as far as I know they haven=E2=80=99t been mishandled.&nb= sp; I know the airspeed gauge is UMA.  I suspect the altimeter is the s= ame  brand.  These are the  two failed instruments.

 

Advi= ce welcome.

 

John Barrett

&nbs= p;

 

 

 

 

Regards,

 

Joh= n Barrett, CEO

Leading Edge Composites<= o:p>

PO Box 428

Port Hadlock, WA 98339

&n= bsp;

www= .carbinge.com

 

=
= --Apple-Mail-16-70791856--