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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › OS #8 -Still THE plug for heli use?
04-22-2011 12:58 PM  7 years agoPost 1
MartyH

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USA

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I use the OS #8 glow plug in all of my helis and need to order some. 1) Is this still THE plug for our use and 2) where is a good place to order? I can get them for about $4.50ea a dozen at a time.

Marty

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04-22-2011 01:31 PM  7 years agoPost 2
Dr.Ben

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Richmond, VA, USA

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Though not perfect for every engine, pipe and fuel combination, they still run great for the vast majority of users using typical set ups, including 30% nitro fuels.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-22-2011 02:48 PM  7 years agoPost 3
MartyH

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USA

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Hi Ben. I probably should have mentioned the fuel I use in my original post. I run Wildcat 15% Helimix in them all. What is the new OS plug they introduced for helis? Are there any proven benefits to using the new plug over the #8?

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04-22-2011 02:51 PM  7 years agoPost 4
merlin3

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dayton, ohio

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os 8 or enya 3, both are great plugs.

Justin - Team Horizon, Team Byron
2-700x, Trex 700n, small helis

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04-22-2011 05:18 PM  7 years agoPost 5
DS 8717

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OS #8 and Enya #3 bothe work about the same,the Enya seem to last a little longer.If you mean the OS #7 its a little hotter than the #8 and probably wouldnt be a better choice over the #8 if you using 15% nitro.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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04-22-2011 05:51 PM  7 years agoPost 6
Dr.Ben

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Richmond, VA, USA

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In cooler weahter you might go with the Enya 3 or OS 7. The 8 will be fine in hotter weather.

For the price that you can get the 8's, I'd still go with them because the motor is going to run just great on them.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-22-2011 06:11 PM  7 years agoPost 7
MartyH

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USA

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#8 it will be then. Thanks.

Marty

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04-23-2011 12:41 AM  7 years agoPost 8
Zaneman007

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Texas - USA

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Depends on the engine and fuel combo.

The OS8 is the coolpower 30%, OS 50 combo preference.

Old Guys Rule!

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04-23-2011 12:57 AM  7 years agoPost 9
MartyH

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USA

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Depends on the engine and fuel combo.

The OS8 is the coolpower 30%, OS 50 combo preference.
As I stated above, I'm using the OS #8 in ALL of my helis. You should have been able to read my mind that that means OS37, OS50, OS50hyper, Os 61, OS 70, TT70, OS91 engines and the fuel for all is Wildcat 15%. I actually gave you that one.

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04-23-2011 01:21 AM  7 years agoPost 10
ren

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Houston, TX

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I just changed from enya #3 to enya #4 and it run colder, but it cost more .

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04-23-2011 03:14 AM  7 years agoPost 11
baby uh1

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St. James, Mo.

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I'm running the 7 in my OS 50 with WC 20% and can't really tell any difference from the 8.

Anything is possible if you don't know what you are talking about!

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04-23-2011 06:01 AM  7 years agoPost 12
Dr.Ben

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Richmond, VA, USA

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Most of today's set ups are pretty tolerant of plug and even fuel.

Go back 15 years to the days of 15% fuel running on V-Tech's and other partially tuned to fully tuned exhausts, and I promise you that plug choice was VERY important.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-23-2011 09:41 AM  7 years agoPost 13
Brendan78

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NSW Australia

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+1 for the #8, my OS and YS love them on 30%

Raptor 90 G4 / YS120SRX / VBar Silverline / Futaba / Rotor Rage / Edge

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04-23-2011 11:26 AM  7 years agoPost 14
oopsididitagain

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Dubai

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wouldnt you want to run a OS#7 on hotter weather instead of cooler weather?

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04-23-2011 01:57 PM  7 years agoPost 15
DS 8717

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With helicopters its more the nitro percent and how rich you run the needles.The richer the needle setting the hotter the plug needs to be to keep it going without flaming out.If you run your needle lean for max power you need a colder plug so it wont burn up and distort the element.Helicopters run much richer needle settings especially in mid range so they need a hotter plug to keep it from cooling down and quiting or stumbling.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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04-23-2011 02:09 PM  7 years agoPost 16
baby uh1

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St. James, Mo.

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Why would you run a hotter plug in hotter weather?

Anything is possible if you don't know what you are talking about!

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04-23-2011 05:05 PM  7 years agoPost 17
oopsididitagain

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Dubai

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thanks guys , i guess my hobby shop guy screwed me up as he told me to use a OS#7 in middle east weather . and my own ignorance to assume that he is right .

So it follows the same idea as a car spark plug the higher the number the colder the plug ?

I will bear that in mind before scrapping off my OS#7 plug .

is there any graphical indication to know that you're using the right or wrong plug guys? i know tuning comes into play as well . just wondering if there is some guideline i shud follow in choosing plugs

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04-23-2011 05:18 PM  7 years agoPost 18
baby uh1

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St. James, Mo.

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If I'm wrong someone else needs to chime in and correst me. i think that the OS 7 is the same haet as the Enya 3. I also think that the heat range of the plug makes more difference to engine timing than engine temp. The critical factors are the nitro percentage and the compression of your engine.

Anything is possible if you don't know what you are talking about!

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04-23-2011 05:48 PM  7 years agoPost 19
DS 8717

rrProfessor

Here wishing i was somewhere else

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The higher heat range means it holds higher heat in the element,It doesnt have much effect on timming. Compression has the biggest effect on when the mixture fires and if you run your engine runs too hot it will cause pre ignition. Engine temp is a result of wheteher you fuel mixture is too lean or too rich. We use hot plugs because we run or motors rich and need a hot plug to keep it from cooling the element and making the motor quit. when i raced Rc boats we ran very high compression and 60% nitro,we used very cold plugs because of the high combustion temps.we also ran the motors wide open so we didnt need throttle response. I could never see any difference between an OS 8 and Enya 3 plug in the way they ran,i could never see any difference between an Enya 3 and 4 or and OS 8 or 7...

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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04-23-2011 06:17 PM  7 years agoPost 20
oopsididitagain

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Dubai

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thanks guys , unlike car engines where ignition timing comes into play . and as you know i just started out in nitro hence the noob questions *laughs*

wouldn't all the engines sold in the market have the same compression? i have a TT redline 53 on my trex 600 and OS engine on my TREX 700 . or are they ways i can alter the compression ratio ( i.e. modifying it with aftermarket parts) .

assuming stock or any nitro % ( which as stated is a factor here) , you would only know what glow plug range to use if it flames out on you during flight? or u will have to keep pulling out the plug to check the condition?

Thanks

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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › OS #8 -Still THE plug for heli use?
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