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I would say that the glowing red
headers wouldn't set EITHER off. The NEWER ones are less likely to
be fooled by a welders arc.. remember, these devices are meant to
be used in refineries as fire detection triggers to deluge
sprinkler systems..... welding and other hot work happens in that
setting.
I remember at a fly in at Pecan Grove about 8 years ago or so,
someone was presenting about the detector and we were ALL
surprised when in the middle of the presentation the detector
"detected".... and we all scratched our heads until I noticed a
propane radiant heater with a sunflower style burner in the corner
40 feet away was our source.
The detectors use UV spectrum for flame/combustion detection. They
use IR for crosscheck/validation, not primary detection. Thats my
laymans understanding of it.
Dave
On 8/2/2012 1:12 PM, CozyGirrrl@aol.com wrote:
Dave, is this to say that even the glowing turbo header
would not set one of the newer ones off?
Chrissi & Randi
www.CozyGirrrl.com
ClickBonds 10/$7.50
CG Products, Custom Aircraft Hardware
Chairwomen, Sun-N-Fun Engine Workshop
Its a Ultraviolet
spectrum detector that detects signatures that are
unique to arcs and combustion. Infrared heat
signatures aren't the trigger. Some of the later
generation ones have both UV and Infrared to
crosscheck each other, but the key trigger is UV
light from combustion.
These same detectors are used in chemical plants as
fire detectors, and the older ones can be falsely
triggered by welders arcs. I took a bath once in my
younger days when a welder's arc set off the fire
suppression/deluge system in the unit in which we
were working.
Dave
On 8/2/2012 8:34 AM, Chris Barber wrote:
Also, it was impressive how it's response
focused on flame and not just heat, however, do we
know how it responds to a glowing exhaust?
Sent from my iPhone 4
Years ago there was an engine fire in a 20B
pusher (Velocity??) that was due to a burst oil
cooler. He actually blew up two coolers (same
make/model), then switched to a certified
engine. I don't recall his name, but he was
alerted to the fire by ATC.
Mark S.
On Wed, Aug 1, 2012
at 9:48 PM, John Slade <jslade@canardaviation.com>
wrote:
Thanks for caring, Chris.
No. Not me.
I've never heard of the guy - Don
Black???
I wonder what caused the fire. Oil or
fuel leak?
Regards
John
On 8/1/2012 9:29 PM, Chris Barber
wrote:
When I first heard I fears it was
John Slade but have been assured it
was not. No less tragic tho. I heard
it was his sixth flight from a
couple of sources. Someone posted
the registered name but I did not
immeadeatly recognize it. I had one
fear it was me. Not me yet yikes.
Sent from my iPhone 4
On Tue,
Jul 31, 2012 at 7:11 PM, Mark
Steitle <msteitle@gmail.com>
wrote:
Chris,
Yes, that was me that
brought and demonstrated
the IR fire detector. I
had it mounted in a metal
project box on the hot
side of my engine, but it
failed shortly thereafter.
My guess is the UVtron
photo tube failed.
Replacement sensors were
$28/ea at the time, so it
has been sitting on the
shelf waiting for some
time to mess with it
again.
Since I experimented
with the first one, the
design has been upgraded
and the old model is no
longer available. You can
purchase the whole kit for
$89 at http://www.acroname.com/robotics/parts/R345-UVTRON-PKG.html .
Just mount it in a robust
box with a hole facing the
engine and wire it to 12 -
24 volts. You'll want to
put an LED on the panel to
warn you in case of fire.
Mark S.
On
Tue, Jul 31, 2012 at
1:51 PM, Chris
Barber <cbarber@texasattorney.net>
wrote:
Several
years ago at the
rotary get
together in Pecan
Gove south of Ft
Worth, Texas a
flame detector was
demonstrated. Does
anyone remember
this and have any
info on it? The
demo was
impressive and I
would hope/think
the technology has
improved and is
available.
With the recent
fire in a turbo
rosary canard a
few days ago it
got me
comptemplating
such matters
again. Especially
in a pusher.
Thanks.
Chris Barber
Houston
Velocity 13b Turbo
Phase One Testing.
Sent from my
iPhone 4
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Kelly Troyer
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