REFLECTOR:Fire Detection System
UTI
reflector@tvbf.org
Tue, 02 Sep 2003 16:24:57 -0400
<html>
Don,<br>
Need to measure/sense not the heat, but the <u>smoke </u>and
<u>flame</u>.<br>
Measuring heat will give you false reading often, even if
temperature<br>
outside will change a little bit. <br><br>
Smoke detectors often using radioactive isotope and sensor.<br>
Flame sensor it is piro-sensor which will sense only infrared.<br><br>
A few years ago I start to develop such emergency detector, but
luck<br>
of potential customers stop me. I could restore such development <br>
if there is any interests and/or any one willing to invest in R&D
and<br>
future production/corporation... :-)<br><br>
Vlad<br>
N1UT 173RG 20B<br><br>
<br>
At 02:58 PM 8/29/2003 -0400, you wrote:<br>
<blockquote type=cite class=cite cite>Thanks to Mack Murphree, for the
FAX info on his system.<br>
Mack's system is a 252degreeF heat sensor on the engine side of the
firewall <br>
with a relay, push to test button, green light for system OK and a red
light <br>
for WARNING.<br>
He has 2 separate systems with 2 separate sensors for redundancy. (Hope
these <br>
details are accurate) Mack says they determined max firewall temp(during
<br>
climb)is 165degreesF. Mack, is your normally closed sensor a fuse
or will it <br>
reset??<br><br>
My idea is one system with 3 thermal fuses in series, one located
near fuel <br>
servo,<br>
and one attached to each wing root aft nearest rear exhaust pipe.
Cowlings <br>
could be removed without having to disconnect system wires.
At my Radio Shack <br>
the lowest temp thermal fuse is 262degreesF, part # 8125. Has any one
measured <br>
max cowling temps at these 3 mentioned areas? For any builders that
have a <br>
system installed, what temps are your fuses? <br>
Inputs welcome. <br>
Don White N19DW XL/RG<br>
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