REFLECTOR:Secondary fire detection

[Fred Marconi]

Thanks Richard:

I was just giving an answer to this camera issue.  We are going crazy with
this engine fire stuff.  How many Velocities are flying without a problem?
The instructions call for a shut off valve and a year ago we were talking of
temp sensors from Radio Shack of which I am installing two in two different
locations.  The meter was just an idea to replace the camera and the glass,
which I think is a little too much.

Have you ever heard of fire in other planes?  Give me a brake, if Velocity
is a time bomb then forward engine planes are smoke chambers traps.

Fred.

----- Original Message ----- 
From: <richard@riley.net>
To: <reflector@tvbf.org>
Sent: Friday, July 18, 2003 12:48 AM
Subject: Re: REFLECTOR:Secondary fire detection


> Try http://www.protectowire.com/products/protectowirelhd.htm
>
> I don't know what temperature rating you'd want, it might be different in
> different parts of the engine compartment.
>
>
> At 12:48 AM 7/18/03 -0400, 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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