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AlignRC Thunder Power RC
tgalo

Senior Heliman

USA

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My first nitro model in over 20+ years. My question is about glow plugs with idle bars. Back in the 80s we always used plugs with idle bars. I am a sport flyer. Would it hurt to use a plug with a idle bar or no big deal or doesn't matter?
Thanks, T

Gravity's a bitch ant it?

06-23-2016 11:50 PM
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crflyer

Senior Heliman

Maine

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No idle bar, Os8 or Enya3 plugs are what I use.
I remember using idle bar plugs years ago on my planes.

06-24-2016 12:45 AM
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Four Stroker

Elite Veteran

Atlanta

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If you have a bunch of idle bar plugs AND you have an engine that can use them (they don't bang into the piston), then go for it. Curtis used to use idle bar plugs for some reason. They will run. Glow plugs are expensive !

06-24-2016 01:17 AM
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Gearhead

rrMaster

Vt

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some of those Idle Bars come off pretty easily, like the ones on the K&B's, just rock them back and forth with Needle Nose and they will come off, then file the burs down, nothing to it,

also, know that most heli engines today use a medium plug because they rev higher than most plane engines, (and some part on the tuned pipes, and the high 30% Nitro)..

Jim
Buzz Buzz Buzz

06-24-2016 02:51 AM
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Four Stroker

Elite Veteran

Atlanta

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Yes K&B pop off easily and run pretty well with 30%.
Throw FOX plugs away anyway. Enya #3 is a hot plug.

I guess we are assuming that you HAVE some old idle bar plugs ?

06-24-2016 12:46 PM
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tgalo

Senior Heliman

USA

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Yeah, not to old. OS #7 with idle bar. We ran the engine last night with the OS #7 and it was sweet but I probably wont use it. Lots of people like Enya. But I'm only running 15% cause that's what we used back then.... Got to get with the times I guess

Gravity's a bitch ant it?

06-24-2016 01:02 PM
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Four Stroker

Elite Veteran

Atlanta

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When buying NEW plugs, the first reply is good. But also OS makes a #6,7,8,9 and Enya #3,4,5,6. You should at least try different plugs to find out what works best for you. People like the Enya #5 with the 105 on 15% for example. In very hot weather, I have used an Enya #4 with 30%. Either brand is fine. Just pick one. But get a range of plugs to try out.

There are bad plugs which show up now and then. Fox plugs were horrible in heli's but I used them for years in planes ? An old brand of plugs had a glass seal that would crack and the center of the plug would blow out of the engine !

06-24-2016 01:56 PM
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Four Stroker

Elite Veteran

Atlanta

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One other thing. As Clarence Lee said 50 years ago, get a 1/4 x 32 die and clean up all of the glow plug threads before installing.

06-24-2016 02:01 PM
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tgalo

Senior Heliman

USA

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Thanks, I will pick up few ranges of plugs. Not to get off thread but your the guy who's working the 4 cycle heli right? Believe it or not I tried that years ago with a GMP competitor. I cant remember what engine it was but I remember it didn't turn out to good. The thing barely had enough power to hover. I have had pictures I'll try to find. But four stroke glow engines have come a long way in 30 years I'm sure...
T

Gravity's a bitch ant it?

06-24-2016 04:04 PM
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Four Stroker

Elite Veteran

Atlanta

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Do you recall that F3C guys all had four strokes in the early 90's ? Like Dr.Ben who probably had an XCell Pro Graphite 4-Stroke ? There are and were then limitations. YS is the only 4-stroke worth thinking about. They have 50% more HP roughly than any other engine due to the supercharging. 99% of RC plane guys don't know what that means. The YS 80 is about the same size as a Hyper 50 and puts out about the same power.

There were many anemic 4-strokes that would barely get off of the ground - Kyosho Legato OS 52, Kalt Baron 30 Enya 53, Vario SkyFox OS 90. They were amusing to fly.

You probably don't remember the 15 pound scale ships that had a 1 HP airplane engine ? Some of them never got off of the ground at full throttle.

06-24-2016 07:45 PM
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Gearhead

rrMaster

Vt

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Yeah, not to old. OS #7 with idle bar.
as I know the OS 7 doesn't come with an Idle Bar, see my OS link

http://www.osengines.com./glowplugs/index.html

Jim
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06-25-2016 02:11 AM
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flycatch

Senior Heliman

Barstow, California

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Do not purchase Chinese clone OS Plugs off Ebay.

06-25-2016 06:28 PM
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Todd74

Senior Heliman

PA, USA

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Are the Chinese clone plugs packaged to look exactly like they are genuine OS?

06-25-2016 09:15 PM
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flycatch

Senior Heliman

Barstow, California

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Yes they are just read the fine print. The filament is the key component of the glow plug. The Chinese copy has far less tungsten than a OS original plug.

06-26-2016 03:05 AM
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wjvail

Key Veteran

Meridian, Mississippi

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Yes they are just read the fine print. The filament is the key component of the glow plug. The Chinese copy has far less tungsten than a OS original plug.
Before this goes too far...

I have bought a lot of OS plugs off eBay and all of them shipped from China. They have always been great plugs.

Going on, I have never seen anything to suggest there is a larger problem with counterfeit OS plugs. A quick Google search does not bring up a rash of complaints. In fact, there is surprisingly little to suggest there has ever been a problem with counterfeit OS glow plugs.

Finally, the materials and construction of glow plugs is not commonly published but my understanding is that Platinum and Rhodium are the elements primarily responsible for the catalytic action of our glow plugs. There may be Tungsten in a glow plug but it is not the element someone cloning plugs would consider eliminating. Comparing $670/oz for Rhodium, $1,000/oz for Platinum, and $20/POUND for Tungsten, Tungsten is cheep. It is not the element responsible for the cost of glow plugs.

There may be "Chinese copy" plugs. I haven't tried them all. I just have never heard of them.

Bill

"Well, Nothing bad can happen now."

06-26-2016 02:59 PM
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lightningrc

Elite Veteran

UK

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Same here over the years bought many OS 8 plugs from eBay through China sellers , never had any problems , if I have had copies then I could not tell .
Only have plugs fail from a lean run or bearing on the way out which is very rare

06-26-2016 03:23 PM
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banshee rider

Senior Heliman

n.e. illinois

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The glow plugs I have seen on ebay are about the same price as the ones from RC Japan so there probably not clones

I seriously doubt anybody is going thru the trouble manufacturing/cloning glow plugs

There are a lot more lucrative things to fake than glow plugs

https://www.rcjapan.net/o-s-engine-...cet64c2vfl8ocu3

http://www.ebay.com/itm/like/131811...s&ul_noapp=true

ageing is manditory maturity is optional

06-26-2016 04:43 PM
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MartyH

rrProfessor

USA

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I have to go find the conversation but I have always been using OS#8 plugs in every one of my OS heli engines until I needed more plugs and for some reason I got talked into OS #6 plugs. I don't remember what that conversation was but I started using one in an OS 70SX-H last evening because that's all I have and it seems to work fine. Does anyone remember the conversation or know why someone would have suggested replacing OS#8 with #6?

09-26-2016 12:33 PM
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Gearhead

rrMaster

Vt

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know why someone would have suggested replacing OS#8 with #6?
if you like running extra rich settings

restricting exhaust

extra high oil content

to help with running a lower idle

to smooth out a ruff idle

a hotter plug should produce a smoother spool up

very low Nitro content, 10% or less

if your filaments in a given plug # wont last long

don't be surprised if you find a hotter plug from your norm produces lower power at Peak Throttle , yet produce better Throttle Response/more power at lower Throttle, this goes along with what I said above> a hotter plug from your norm will, or should give you a smoother idle and or a lower idle and a smoother spool-up

I would also think a hotter plug would help with high humidity conditions

Note) if you read a lot about glow plugs you will find that a Cold Plug is recommended for 25%, 30% and 35% Nitro, but this is not-so for helis, my thoughts here is> that this is because a plane has more "Flywheel Effect" with a Prop than a heli has with a Gear Reduction Transmission, a heli may have a load on it's engine but a plane's prop has momentum in it so it doesn't need as hot a plug as a heli needs to burn it's fuel at lower throttle

Jim
Buzz Buzz Buzz

09-27-2016 04:26 AM
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Four Stroker

Elite Veteran

Atlanta

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Yeah, never let the local club engine expert adjust your heli engine !

09-27-2016 01:19 PM
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