REFLECTOR: Pilots report cockpit power failures

[Andrew Judge]

It's (NT) actually preemptive kernel multitasking, not RTOS. http://en.wikipedia.org/wiki/Preemption_%28computing%29

An OS like VxWorks is an RTOS which is used in things like pacemakers.

Just 2 cents from a computer geek...

Andy
________________________________
From: reflector-bounces at tvbf.org [reflector-bounces at tvbf.org] on behalf of Scott Derrick [scott at tnstaafl.net]
Sent: Wednesday, August 22, 2012 9:23 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Pilots report cockpit power failures

I worked on the system for the 767, 787 aircraft at Raytheon, years ago.  Amazingly enough Raytheon bought the code base from Microsoft for NT, which I do consider the best OS Microsoft has ever made.  They re-engineered into a "real time" os.  Running on hardned military grade chassis. My little Air Data subsystem was given about 2% of the total alloted time for critical systems.

Every 767 has three of these computers running on three different buss's.  With a split redundant buss available to any computer.  All three cross check each other. They have never had a system wide failure.

The computer handles everything from engine control to the lavatory lighting.

Scott

-------- Original Message --------
Subject: Re: REFLECTOR: Pilots report cockpit power failures
From: Lawrence Epstein <ljepstein at hotmail.com><mailto:ljepstein at hotmail.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org><mailto:reflector at tvbf.org>
Date: 08/22/2012 06:11 AM
This is why I am using GRT (with dual AHARS) as my main system and a Dynon (on a separate Bus) as a back up.

The thinking is that all systems have unpredictable failure modes and by having 2 different systems, the likelihood is that the failure modes will be different.

LJE

On Wed, Aug 22, 2012 at 7:16 AM, Mark Magee <edjonesbrady at gmail.com<mailto:edjonesbrady at gmail.com>> wrote:
All,
Interesting article on failure of Airbus Glass Flightdecks:

  Pilots report cockpit power failures in Airbuses; some jets still awaiting fixes<http://fxn.ws/SRgDHE>.

Seems even commercial-grade glass goes to sleep at inopportune times occasionally at this stage of the technology's development. This problem seems fairly severe. A few steam gauges for backup might be the MO for the foreseeable future as we head solid-state on our flight instruments.

Sent via the FOX News iPhone App. Download the app here<http://itunes.apple.com/us/app/fox-news/id367623543?mt=8>.


Mark B. Magee
N34XL
Sent from IPhone 4

_______________________________________________
To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!  www.tvbf.org/gallery<http://www.tvbf.org/gallery>
user:pw = tvbf:jamaicangoose
Check new archives: www.tvbf.org/pipermail<http://www.tvbf.org/pipermail>
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html




_______________________________________________
To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!  www.tvbf.org/gallery<http://www.tvbf.org/gallery>
user:pw = tvbf:jamaicangoose
Check new archives: www.tvbf.org/pipermail<http://www.tvbf.org/pipermail>
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html


--
He who has injured thee was either stronger or weaker than thee. If weaker, spare him; if stronger, spare thyself.
William Shakespeare
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20120822/3af6268f/attachment-0001.html>