X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 19 Jan 2012 10:55:27 -0500 Message-ID: X-Original-Return-Path: Received: from elasmtp-banded.atl.sa.earthlink.net ([209.86.89.70] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with ESMTP id 5356254 for lml@lancaironline.net; Thu, 19 Jan 2012 09:14:31 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.70; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=AJwSHhozcn2MhXGDIQQukBE7ZkAj/TSSSZO+VHm6yq2l8OtSFhcqmTsOR6lXDbG+; h=Received:Subject:References:From:Content-Type:X-Mailer:In-Reply-To:Message-Id:Date:To:Content-Transfer-Encoding:Mime-Version:X-ELNK-Trace:X-Originating-IP; Received: from [72.73.82.72] (helo=[192.168.1.30]) by elasmtp-banded.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1RnskV-0006UD-TP for lml@lancaironline.net; Thu, 19 Jan 2012 09:13:56 -0500 Subject: Re: [LML] Re: Steam Gauge Backup References: From: Colyn Case Content-Type: multipart/alternative; boundary=Apple-Mail-2-782881295 X-Mailer: iPhone Mail (8B117) In-Reply-To: X-Original-Message-Id: X-Original-Date: Thu, 19 Jan 2012 09:13:51 -0500 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (iPhone Mail 8B117) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da9409bd8afb9a224363da293b05cbc56560f350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 72.73.82.72 --Apple-Mail-2-782881295 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Brent, Not sure what you meant by OR Did you mean you are okay with certified efis and no spinning mass?=20 Or did you mean you must have certified efis AND spinning mass? Sent from my iPhone On Jan 19, 2012, at 9:01 AM, Brent Regan wrote: > Not my system. Please note my post was quoting Ed Gray.=20 >=20 > As a developer of certified PFDs, MFD, ADAHRS, MSUs, etc. I agree with Mic= hael. >=20 > If you plan to fly IMC without a spinning mass backup OR a certified E= FIS then you are "Dead Man Flying". >=20 > I have destroyed too much equipment during per-qualification testing of ce= rtified equipment and have done too many post crash analysis for the NTSB to= have any other opinion. >=20 > Regards > Brent Regan >=20 > On 1/18/2012 6:11 PM, Michael Newman wrote: >>=20 >> Your dual systems are running the same software. Which (in my opinion as a= >> developer of such software) is the MOST LIKELY point of failure in the >> system. >>=20 >>=20 >> Ed Gray writes: "I have no steam gage backups. With dual screens,=20 >> backup batteries and dual ADHRS I feel that I have enough redundancy. =20= >> Does anyone have input or comment? This plane may be one of the first=20= >> with no round gauges anywhere."(sic) >>=20 >>=20 >=20 --Apple-Mail-2-782881295 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=utf-8

Brent, Not sure what you meant by OR

Did you mean you are okay with certified efis and no spinning mass?

Or did you mean you must have certified efis AND spinning mass?

Sent from my iPhone

On Jan 19, 2012, at 9:01 AM, Brent Regan <brent@regandesigns.com> wrote:

Not my system. Please note my post was quoting Ed Gray.

As a developer of certified PFDs, MFD, ADAHRS, MSUs, etc. I agree with Michael.

If you plan to fly IMC without a spinning mass backup OR a certified EFIS then you are "Dead Man Flying".

I have destroyed too much equipment during per-qualification testing of certified equipment and have done too many post crash analysis for the NTSB to have any other opinion.

Regards
Brent Regan

On 1/18/2012 6:11 PM, Michael Newman wrote:
Your dual systems are running the same software. Which (in my opinion as a
developer of such software) is the MOST LIKELY point of failure in the
system.


Ed Gray writes: "I have no steam gage backups.  With dual screens, 
backup batteries and dual ADHRS I feel that I have enough redundancy.  
Does anyone have input or comment?  This plane may be one of the first 
with no round gauges anywhere."(sic)

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