Moderator Comment by Gary Mortimer on June 26, 2012 at 12:21pm

Its for the morse code telemetry system. That was the upgrade the first one was a little man with flags.

Distributor Comment by Dany Thivierge on June 26, 2012 at 1:09pm

no it's a Tube! way better sound quality than transistors!  and it was pulsing too... I guess it's the first iteration of the led Show code.  

Comment by Melih Karakelle on June 26, 2012 at 1:30pm

It is a mercury switch for orientation sensing ;)
It is detecting up side down

Distributor Comment by RC Tech.se on June 26, 2012 at 1:35pm

My guess it is a heatsource to keep the other stuff at a consistent temperature.

Distributor Comment by RC Tech.se on June 26, 2012 at 1:35pm

Bur i do like Melihs idea!

Comment by MarcS on June 26, 2012 at 1:36pm

I think I´ve seen some of these bulbs before, years ago in controller boards for model submarines. I think these are half fluid filled with sensor wires for tilt sensing. In an autopilot they could be used for gravity vector sensing...

That was the time before cheap MEMS..

Here is some reference: http://www.ferret.com.au/c/Bestech-Australia/Dual-axis-electrolytic...

http://www.futurebots.com/sens3.htm

Comment by Dr Mike Black on June 26, 2012 at 1:41pm

LOL...superb........

We had one of these, what an utter nightmare to set up...It took ages to get a presentable flight from from it, did work in the end (being noobs with it didnt help either...)

Im glad things have moved on some...lol

What a great share!

Comment by Phillip Schmidt on June 26, 2012 at 2:45pm

Like MarcS said, It's an electrolytic tilt sensor.

http://www.spectronsensors.com/tilt-sensors.php  (last item on the page)

Comment by Krzysztof Bosak on June 26, 2012 at 4:39pm

@Gary relax, it cannot be that old. As I remember those were the days when GPS was already coal-powered, wooden solar cells were already a thing of the past and a subject of many jokes among those in the know.

Comment by Maxwell Wheeler on June 26, 2012 at 6:02pm

flux capacitor

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