Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sat, 18 Dec 2004 11:55:13 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m23.mx.aol.com ([64.12.137.4] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 572036 for lml@lancaironline.net; Sat, 18 Dec 2004 09:49:58 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.4; envelope-from=VTAILJEFF@aol.com Received: from VTAILJEFF@aol.com by imo-m23.mx.aol.com (mail_out_v37_r3.8.) id q.8c.1c74d42a (3858) for ; Sat, 18 Dec 2004 09:49:23 -0500 (EST) From: VTAILJEFF@aol.com X-Original-Message-ID: <8c.1c74d42a.2ef59d72@aol.com> X-Original-Date: Sat, 18 Dec 2004 09:49:22 EST Subject: Re: [LML] Re: Chelton vs Avidyne X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1103381362" X-Mailer: 9.0 for Windows sub 5114 -------------------------------1103381362 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Ditto Bob Pastusek's comments. I have been flying behind the Chelton system now for 2 years and 400 hours and have been generally impressed by its features BUT have also seen the weaknesses of an all glass panel. It is awesome for flying IFR, maintaining situational awareness in mountainous terrain, etc. However I have seen the panel(s) go blank (more than once) and for different reasons-- once while IMC over Jackson Hole; had a TIT failure wipe out all engine/ air data; seen screwy AHARS wanderings; and the like-- all without any aural warning or text failure mode annunciated. As Hamid has stated here before-- make certain you have a good mechanical backup system and know how to use it. I have seen some truly badly planned panels that I would not attempt IMC with because of the failure of the builder/ pilot failed to account for a backup in the event of an EFIS failure. Most, if not all certified EFIS systems out there now have mechanical backups. If you put all your eggs in the EFIS basket be prepared to making omelets. Jeff Edwards LIVP N610SJ -------------------------------1103381362 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Ditto Bob Pastusek's comments. I have been flying behind the Chelton sy= stem now for 2 years and 400 hours and have been generally impressed b= y its features BUT have also seen the weaknesses of an all glass panel. It i= s awesome for flying IFR, maintaining situational awareness in mountainous t= errain, etc.

However I have seen the panel(s) go blank (more than once) and for diff= erent reasons-- once while IMC over Jackson Hole; had a TIT failure wipe out= all engine/ air data; seen screwy AHARS wanderings; and the like-- all with= out any aural warning or text failure mode annunciated.

As Hamid has stated here before-- make certain you have a good mechanic= al backup system and know how to use it. I have seen some truly badly planne= d panels that I would not attempt IMC with because of the failure of the bui= lder/ pilot failed to account for a backup in the event of an EFIS failure.=20= Most, if not all certified EFIS systems out there now have mechanical backup= s. If you put all your eggs in the EFIS basket be prepared to making omelets= .

Jeff Edwards

LIVP N610SJ

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