On board glow plug switch? - RC Groups
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Jun 28, 2005, 10:13 AM
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On board glow plug switch?


First of all I want to say I am experimenting with Gasser Motors. Right now I prefer not to run any ignition. I am using a glow plug and methanol/oil?

I can get the motor to run at idle if the glow plug is hot all the time, and at higher rpms I dont need the plug on.

I was hoping there was something available or simple to build where I could switch the plug on and off with my landing gear switch?
Do you think it will work?

Here is a picture of how I have the glow plug attached.

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Jun 28, 2005, 11:08 AM
Registered User
On a typical methanal fueled engine with glow plug, once started, you do not need the plug connected even at idle. If you feel you must, it is easy to mount a cam on a servo and have the cam turn a pushbutton switch on or off.
Jun 28, 2005, 12:38 PM
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vintage1's Avatar
Ther are methods that pass a small current through the plug, and try and control the voltage - it the plug gets cooler, the voltage falls and current is applied to heat it up again.

However its better to pulse it and measure the voltage on a lower current, and use the implied resistance to control a higher current pulse.

Ther are circuots about to do this, and a seasrch in this forum may reveal one.
Jun 28, 2005, 12:55 PM
Registered User
It dies at idle when I remove the glow power.

I will do some more searching.
Jun 29, 2005, 06:53 AM
Registered User
Yes, saw an article in RCM magazine, its Automatic Glow Plug Switch, automatically turn on the glow plug when it detect a cold glow plug.....no need to make a separate channel to turn ON/OFF the glow plug switch.
Jun 29, 2005, 07:24 AM
"MAYONNAISE"
Acetronics's Avatar
HI, Ellion

Have a link ???

Two novelties here : the "Gas-Brain" ... The Brain for Gas Engines !!! and "the Magic Box" or how to parallell two servos ( rotation, neutral and 1/2 throws adjustable for the second servo ) ... a differential version is on the bench !!! may be exponential travel further.

Alain

Hi, Fishmasterdan

"The Brain" an electronic Glow Heather, plus fail safe, plus glitch filtering ...

http://aeronews.free.fr/anciensnum/1...ropratique.zip

... The most achieved glow device to the day ...
Jun 29, 2005, 07:32 AM
"MAYONNAISE"
Acetronics's Avatar
Quote:
Originally Posted by vintage1
Ther are methods that pass a small current through the plug, and try and control the voltage - it the plug gets cooler, the voltage falls and current is applied to heat it up again.

However its better to pulse it and measure the voltage on a lower current, and use the implied resistance to control a higher current pulse.

Ther are circuots about to do this, and a seasrch in this forum may reveal one.
Hi, Vintage

Have one really working well ???

I'd like to see it ... all those I saw to this day are marvellous self oscillating devices ... glow blinkers, if you've better.

Alain
Jun 29, 2005, 09:05 AM
Vintage Flyer
"Yes, saw an article in RCM magazine, its Automatic Glow Plug Switch, automatically turn on the glow plug when it detect a cold glow plug.....no need to make a separate channel to turn ON/OFF the glow plug switch."

was this a tech/build article or product review?

Jun 29, 2005, 09:51 AM
Registered User
I have been searching but have not found one for sale.
Thanks for the info so far.
Dan
Jun 29, 2005, 11:58 AM
"MAYONNAISE"
Acetronics's Avatar
Hey, Fishmaster ...

Just have a look to Graupner/JR ...

They sell ( awful word ...) such a device ,based upon the stick position ...

Alain
Jun 29, 2005, 02:22 PM
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WJ Birmingham's Avatar
Maybe this is a stupid idea, but I'll post it anyhow.

Why not just take a brushed ESC and servo reverse it from the throttle servo?

As throttle goes up, the plug power goes down, and as throttle goes down, voltage to the plug goes up.
Jun 29, 2005, 02:51 PM
Registered User
hmm that sounds like it might work.
I think to disable the power that is feed to the reciever (from the esc) I will simply cut the black and red. But how to set up 2 throttles? I have an eclipse 7 I wonder if I can mix the gear channel to the throttle channel. Interesting.
Jun 30, 2005, 02:47 AM
Registered User
Alain, I will the check the RCM issue.....will post it here.

FenceMagnet, its an DIY project with the schematic and PCB Artwork, it. uses a common ICs that can found on most electronics store.

Guys, I also interested in this GLOW PLUG igniter....but my interest is using the RECEIVER BATTERY pack to power the GLOW PLUG, I already have the circuits from MAXIMS, its a DC to DC switching ICS, that can convert a 3.6 Volts to 6 Volts to 1.5 Volts at 3 AMPS.......I already ask the sample, 6 months ago, but never got any yet.

FUTABA has this units already call GH-1, infact I already using one in my Scale Helicopter. I install a micro-Switch near the starting insert, upon inserting the starting shaft, this will active the GLOW Igniter.
Jun 30, 2005, 10:37 AM
Registered User
I'm new to gas engines too, just starting to experiment...

If you are into building your own ckt, the optiglo II may fit the bill, check it out at www.cliftech.com.

If you want to purchase, www.ch-ignitions.com makes a jump start system that may work.
Jun 30, 2005, 11:04 PM
Registered User
Yes, OptiGlow is also a simple circuit to contruct but this need extra channel to manually turn-on the glow igniter.

Guys, here is the Glow Driver Circuit from RCM magazine January 2002 issue.....its automatic, no need for extra channel, the circuit just use the receiver battery to power the circuits.

here is also my FUTABA GH-1 glow igniter, its get the power from the Receiver battery pack, its so efficient, I guess its 99% efficient....been thinking of making the same circuits for all my scale helicopter.

Its really difficult to plug and unplug a GLOW IGNITER on scale helicopter.


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