RE: Re: RED ALERT - Safety Review


Subject:    RE: Re: RED ALERT - Safety Review
From:    Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E (mark.bitterlich@navy.mil)
Date:    Thu Oct 09 - 11:11 AM
No, not really Doc.  A rad alt gives very accurate distance to an 
indicator in the cockpit.  It can indeed be used to tie in to a gear 
warning system of course as you mentioned, but it is very expensive.  A 
ground proximity warning system on the other hand, is much cheaper 
(usually) and simply senses that the aircraft is within a certain preset 
distance from the ground.  Extreme accuracy is not usually necessary.  
As long as it triggers somewhere between say 50 to 100 feet from the 
deck.  It would tie in to the gear warning light system with an AND gate 
for summing the gear warning lights.   It could also be wired with a tad 
bit more circuitry to a solenoid that would replace the landing gear 
safety pin.  This pin would activate any time the gear was already down 
and the aircraft was below the GPWS setting with a delay factor.  This 
would also mean that you could not RAISE the gear until you were over 
150 feet or so from the runway.... which is another good safety factor.  
If the gear was UP the solenoid pin would be disabled.  This way you can 
do away with a Weight On Wheels or... Weight OFF Wheels switch, which as 
Tom mentioned is pretty much impossible to do on a 50, or possibly even 
a 52.   But it solves that problem does it not Tom?  

Mark

________________________________

From: owner-yak-list-server@matronics.com on behalf of Roger Kemp MD
Sent: Wed 10/8/2008 11:21 PM
To: yak-list@matronics.com
Subject: RE: Re: RED ALERT - Safety Review


<viperdoc@mindspring.com>

You referring to a WOW switch coupled to a radar altimeter?
Doc

-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, 
Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: Wednesday, October 08, 2008 8:55 PM
To: yak-list@matronics.com
Subject: RE: Re: RED ALERT - Safety Review

What is needed is a cheap and simple ground proximity warning system.   
I
believe the time for that is coming.  We're seeing more and more systems
incorporated in cars that sense proximity.  When these are small, 
reliable
and cheap, putting them into an aircraft will be a no-brainer. 

Mark Bitterlich

________________________________

From: owner-yak-list-server@matronics.com on behalf of Tim Gagnon
Sent: Wed 10/8/2008 9:38 PM
To: yak-list@matronics.com
Subject: Re: RED ALERT - Safety Review




tjyak50 wrote:
> We've gone around and around on this subject for years.
> There is always a way to find a reason why each system isn't perfect.
>
> So nobody does anything.


Build it and they will come.


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p 7999#207999




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