REFLECTOR:Secondary fire detection

[Fred Marconi]

DEAD ON.  WELL THE FIRST WORD IS NOT NICE, I REALIZE, FOR PILOTS TO HEAR.
COULD HAVE SAID BULLS EYE!

FRED

----- Original Message ----- 
From: "Scott Derrick" <scott@tnstaafl.net>
To: <reflector@tvbf.org>
Sent: Friday, July 18, 2003 1:10 AM
Subject: Re: REFLECTOR:Secondary fire detection


> I wonder about fire detection equipment.
>
> You don't want false positives, that could be as bad or worse than a
> real fire.  If I thought I was on fire I'm throwing the gear out, the
> speed brake, at cruise speed, pulling the engine back to idle and shock
> cooling that mother on the way down at one knot under VNE!  TO find out
> later that you put your gear doors through the prop and then landed off
> field and removed the rest of the gear because of a false alarm... not
good.
>
> I keep hearing ideas about multiple sensors, multiple cameras, MUX boxes
> and what not. My cynical nature says "Boy these folks have never owned
> and maintained a flying airplane before."  It takes a major amount of
> time and money to keep a standard radio stack alive and well, now you
> want to add more?
>
> I realize that an engine fire is not as apparent in a pusher, but
> exactly how many airplanes have gone down because of a fire where people
> died?  Would money and time be better spent on really clean and secure
> engine installations?
>
> Scott
>
>
>
> Fred Marconi wrote:
> > SOME TYPE OF TEMPERATURE MEASURING DEVICE WOULD BE THE SIMPLEST WITH A
> > WARNING SIGNAL WHEN THE TEMPERATURE GETS ABOVE A CERTAIN LEVEL.  at THAT
> > POINT NO QUESTIONS ASKED CONSIDER THE HIGH TEMPERATURE A SIGN OF FIRE
AND
> > LAND.
> >
> > FRED
> >
> > ----- Original Message ----- 
> > From: "Hiroo Umeno" <humeno@microsoft.com>
> > To: <reflector@tvbf.org>
> > Sent: Thursday, July 17, 2003 2:45 PM
> > Subject: RE: REFLECTOR:Secondary fire detection
> >
> >
> >
> >>Pat,
> >>
> >>CCDs are quite vulnerable to heat.  You need to look at the data sheets
> >>for the operating temperature range.  The heat inside the engine
> >>compartment is likely to far exceed the allowable heat rating of most
> >>low-cost CCDs.
> >>
> >>As for switcher, I am currently designing a 4:1 video mux based on
> >>LT1204 device and a PIC.  I am intending to put this in the same housing
> >>with the LCD so that there are four buttons that corresponds to each
> >>cams I can switch through.  The cool thing about using the PIC is that I
> >>can set it to "scan" every so often as well.
> >>
> >>I am thinking of mounting cams on the following locations.  Co-pilot
> >>side bottom winglet (180 degree pan), under nose looking forward-down,
> >>overhead duct capturing panel.
> >>
> >>For supplies of LCD panels, Earth Computing (www.earthlcd.com) usually
> >>has some good selection of them.  You can also scour some of the surplus
> >>electronics outlet and get a fairly good deal if you are not particular
> >>about specific device you are looking for.
> >>
> >>Hiroo
> >>
> >>
> >>-----Original Message-----
> >>From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org] On
> >>Behalf Of Pat Shea
> >>Sent: Thursday, July 17, 2003 11:23 AM
> >>To: reflector@tvbf.org
> >>Subject: RE: REFLECTOR:Secondary fire detection
> >>
> >>Hiroo,
> >>
> >>I'm leaning towards keeping the small CCD cams in the
> >>engine compartment primarily for fire detection. It
> >>looks like it's going to take two to get full coverage
> >>of the critical areas. There may also be some benefit,
> >>at least during the tweaking stage, of being able to
> >>see/record what's going on inside the cowl during
> >>flight (tuft testing?). Two cams either means an A/B
> >>switch, two monitors, or a split screen. I was able to
> >>find a company that sells a color, waterproof,
> >>"helmet" cam w/ a cool aluminum protective mount:
> >>www.helmetcamera.com. I haven't had a chance to look
> >>at LCD monitors yet (or the ability to split the
> >>screen) - any leads on a good source for these??
> >>
> >>Pat
> >>
> >>--- Hiroo Umeno <humeno@microsoft.com> wrote:
> >>
> >>>One idea may be to install the "wingtip cam".  I
> >>>have been researching
> >>>this but one could install a small CCD camera on the
> >>>wingtip (perhaps on
> >>>the lower winglet) that can be panned.  Not only it
> >>>would offer a way to
> >>>"see" if your cowl is blowing smoke / fire but it
> >>>will also serve as
> >>>"rear-view mirror" when starting engine, and offer a
> >>>feed for your
> >>>in-flight footage.
> >>>
> >>>
> >>>
> >>>The cameras can be had for less than $100 these
> >>>days, and a small LCD
> >>>monitors can be had for about the same.
> >>>
> >>>
> >>>
> >>>Hiroo
> >>
> >>
> >>
> >>__________________________________
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