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HelicopterMain Discussion › How long should a glow plug last?
06-01-2004 10:11 PM  13 years agoPost 1
maller

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Bucks County, PA

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Should it be replaced automatically after a certain amount of time?

Thanx!



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06-01-2004 10:17 PM  13 years agoPost 2
brooksnb

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Sussex , New Brunswick , Canada

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I change mine after each gallon...that's a lot but if I ever crashed because of a glow plug that I pushed too far...well one crash = much more than a few extra plugs...I don't throw them away however ...I give them to my son for his planks...I fihure he can glide in on a dead plug...me ..I'll plumet

Never, under any circumstances, take a sleeping pill and a laxative on the same night.... Dennis

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06-01-2004 10:22 PM  13 years agoPost 3
Rappy

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Belgium

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With no lean runs..... i chance mine maybe 2 times a year, and after alot off flying.

I try to fly every weekend +- 10 flights/weekend.

Raptor 90 with C-spec and MP2

Regards

Chris

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06-01-2004 10:32 PM  13 years agoPost 4
iskoos

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Orlando, FL

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I have respect for brooksnb's way but changing the plug after burning a gallon seems bit too much to me. I change mine whenever they go out or start making problem.
I am not saying this is the right way and everybody should do this but if you don't run your engine too lean, one plug will burn gallons of fuel safely.
I however agree with brooksnb on the issue that if you are flying heli it becomes more critical than airplanes. Dead stick is rarely a problem for airplanes but it may be serious for helis. You may get away most of the time if you are good at autorotation but if you are not and especially low altitude fast forward flights may be very difficult to perform autorotation.

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06-01-2004 10:42 PM  13 years agoPost 5
Fullagas

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Michigan

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.
No set time. I'm like iskoos, if I start having problems, it's the first thing I change.

I've had plugs go out within 1 tank, but most last a season. Leans runs will shorten their life, absofriggenlutely!


.

Flying helis since gyros had springs.

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06-01-2004 10:42 PM  13 years agoPost 6
sharam

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Northern California - Fly at Morgan Hill Field

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I think, barring lean runs, I average about 20 - 25 flights per glow plug. I tend to run my engines a bit on the rich side.

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06-01-2004 10:46 PM  13 years agoPost 7
Naomi

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Ontario, Canada

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I give them to my son for his planks...I fihure he can glide in on a dead plug...me ..I'll plumet
Haha.. good one!.. tradition continues..

Naomi

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06-01-2004 11:11 PM  13 years agoPost 8
Rotory Wings

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Poughkeepsie, NY USA

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The engines most of us are using (glow) are "semi-Diesel" and the typical plug failure, i.e. broken coil, is not likely to stop the engine but will prevent it from starting on the next attempt. The coil glows from retained heat from one combustion cycle to the next so electrical conductivity is not needed during flight. If it starts it's probably gonna run so if you flame out it was probably something else.
I run them until my power panel meter says the plug's dead!http://www.runryder.com/helicopter/f2p1/

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06-01-2004 11:14 PM  13 years agoPost 9
archangel

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Pasadena, CA - USA

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I have found that if you are running the right mixture, not to lean, a glow plug will give you some warning that it is about go out.

If you have been flying for a couple of weeks and that is no dramatic change in the weather or anything like that and you feel like you want to play with the needles, change the glow plug.

Your heli will "just not idle like it normally does"... Change the glow plug.

When it comes to glow plugs, don't look for anything "wrong" but rather look for something "different". If something is "different" without a reasonable explanation, then something may get "wrong" in a big hurry later that flight.

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06-01-2004 11:28 PM  13 years agoPost 10
ScareCrow_Delta

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Sebastian, FL

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The engines most of us are using (glow) are "semi-Diesel" and the typical plug failure, i.e. broken coil, is not likely to stop the engine but will prevent it from starting on the next attempt. The coil glows from retained heat from one combustion cycle to the next so electrical conductivity is not needed during flight. If it starts it's probably gonna run so if you flame out it was probably something else.
Very true. Flame out is not because of a dead glow plug, it's something else. But sometimes, rare, it's the glowplug, when the coil finaly snaps and falls off.

~~~~ Defy the laws of gravity....gracefully ~~~~

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06-01-2004 11:43 PM  13 years agoPost 11
snookfishnjoe

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manatee county florida

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Raptor 90 with C-spec and MP2
hey Rappy
How has it been running, & how old is it?

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06-01-2004 11:55 PM  13 years agoPost 12
RayJayJohnsonJr

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Midwest

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The engines most of us are using (glow) are "semi-Diesel" and the typical plug failure, i.e. broken coil, is not likely to stop the engine but will prevent it from starting on the next attempt. The coil glows from retained heat from one combustion cycle to the next so electrical conductivity is not needed during flight. If it starts it's probably gonna run so if you flame out it was probably something else.
Actually, I believe it is the catalytic reaction between the methonal and the platinum (or platinum plated) element that gives you that "retained heat". Therefore you may have a failed plug (broken element) but the engine will continue to run as long as there is platinum for the methonal to react with. Some plugs have a solid platinum element while others have a platinum plated element. The plated element plug will tend to fail sooner due to the normal erosion of the platinum as a result of the combustion process.

I went 9 gallons on my last plug before it failed, and I think that failure was due in part to me getting used to a MP2.

-Mark
.

There, their and they're. It's really that simple.

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06-02-2004 12:45 AM  13 years agoPost 13
kauaison

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Alameda, CA

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potentiometer/voltmeter

i also found that it takes a little more voltage to light an older plug, i use this info with the potentiometer/voltmeter on my field box to determine change time. With my Potentiometer adjusted in the green zone my heli should start no prob with a new plug, by the time my voltmeter gets in red (more voltage) the heli is harder to start & Idle, ussually a couple months later...(Gallon a week)

p.s. this is my reference w/OS8 plugs, yours may differ

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06-02-2004 12:46 AM  13 years agoPost 14
Rotor

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Springfield, MO USA

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I use Enya 3 glow plugs and I have never had one quit on me in the air. They always seem to go out between the time you land/shut off the motor and when I go to start it back up. It is like it keeps working as long as the engine is running but as soon as the piston stops going up and down it quits. Now. I have had OS-8's quit while flying and need to be replaced. Anyone else had the same experience with the Enya's?

My motto is this..Fly...Rebuild...Fly

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06-02-2004 12:59 AM  13 years agoPost 15
John Krebs

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Pittsburgh, PA

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I use Enya 3 glow plugs and I have never had one quit on me in the air. They always seem to go out between the time you land/shut off the motor and when I go to start it back up. It is like it keeps working as long as the engine is running but as soon as the piston stops going up and down it quits. Now. I have had OS-8's quit while flying and need to be replaced. Anyone else had the same experience with the Enya's?
Now that you say it. I find the same to be true. My Enya 3s always seem to be found dead when I hook up the lead from my power panel. In five years I can't remember ever finding a dead plug that to be the cause of a flame-out. Doesn't mean it didn't happen, but I sure don't remember it. It must be that when they do go out the filiment stays attached at one end. I also don't remember ever finding one where the filiment is gone. That would explain why the engine keeps running.

How long should a plug last? Until it burns out.

John

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06-02-2004 01:04 AM  13 years agoPost 16
BillR70

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Glen Rock PA

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I had a OS#8 go out last season while i was flying, lucky for me i was able to auto in safley. Most of the time the engine is harder to start. Then i change it right then. ( allways keep spares in your flight box )

Billy

PorkyPines shouldnt be allowed in petting zoo`s.

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06-02-2004 01:17 AM  13 years agoPost 17
Rotor

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Springfield, MO USA

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How about you other heli pilots that use the Enya plugs....do they go out on you inflight or between engine shutting down and restarting?

My motto is this..Fly...Rebuild...Fly

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06-02-2004 02:57 AM  13 years agoPost 18
badbradbreece88

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Northwest Ohio

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usaully i change mine, wait until i have to auto it.

Not to smart
dont take the advice

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06-02-2004 04:55 AM  13 years agoPost 19
the collective

rrKey Veteran

Bayside, NY, U.S.A

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Every Enya 3 I can remember using failed exactly the same way... normal flight, ends as usual, next time I go to fire up the lights on the glowdriver don't come on, plug dead.

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06-02-2004 10:00 AM  13 years agoPost 20
foo

rrVeteran

Richfield, Minnesota

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i agree with the other guys, engines dont stop from a bad glow plug, they just dont start again... ive used the same glowplug for my heli ever since ive had it im now almost through my 3rd gallon, glow plug seems fine ill change it when it dont start...
some people do say that a fouled flow plug will make your motor not idle good, thats sorta believeable i guesss, i dunno... maybe i should get another glow plug. i use quality OS glow plug so i dunno

good night fellow run rhyder members i will sea you all tomorrow again, thanks for letting me participate in the hobby...


--------------Helis are for people who cant prophang.

Raptor 30 v2 / OS .32 / JR 8103 / GY-401+9253 | Raptor 50 V2 / OS .50 Hyper

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HelicopterMain Discussion › How long should a glow plug last?
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