Dan
New Member
Posts: 4
Reg: 12-22-01
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 12-23-01 12:50 AM - Post#4263
Need some help; What is the make up of a glow plug, and why is one plug rated hotter or colder then another., What do'es this do to an engine
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Doug
Senior Member
Posts: 823
Loc: Naples Fl. USA
Reg: 11-17-00
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12-23-01 01:39 AM - Post#4264
In response to Dan
The glow plug has a platinum element and acts as a catalyst to the methanol. The size
of the coil and its length govern the rate of cooling of the coil. A hot plug has a long
fine coil, a cold plug has a thicker shorter element. the temperature that the element
runs at determines the "timing" of the engine. High compression engines need a cold plug and lower compression engines require a hotter plug. Hot plugs will give a more stable idle than a cold plug and a cold plug will survive a lean run on high nitro better. I hope thats answers your question.
[This message has been edited by Doug (edited 12-22-2001).]
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Dan
New Member
Posts: 4
Reg: 12-22-01
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12-23-01 02:23 AM - Post#4265
In response to Doug
Doug;
Thanks For your help!
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Christopher J
Full Time Senior Member
Posts: 3351
Loc: Kansas City, MO
Reg: 11-09-01
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12-23-01 02:40 AM - Post#4266
In response to Dan
I have a question regarding that. I'll be running a Rossi 11.5 later this year. I was told to run an OS #4 in it. It's not much cooler then a #3 plug. This is a high compression engine and I too thought that these type of engines should run on cold plugs. So which is better, a cold or hot plug on high compression engines running 0-5% nitro?Christopher J
| Christopher J
East Coast Vario Field Rep
Size it up and then scale it down |
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JSaleska
Senior Member
Posts: 362
Loc: Navarre, FL, USA
Reg: 12-26-00
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12-23-01 03:26 AM - Post#4267
In response to Christopher J
I've got the OS91 which is a Compression monster. Does that mean I should be running a cooler plug that the OS #8 or Enya #3? Surely there is a reason they make the other plugs, but I've never used anything cooler then these.
| Freya OS91 Hatori 9252s, Sceadu OS50 Muscle Pipe 9202s, Futaba 401s in both, FF9 Radio |
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Steve Campbell
Senior Member
Posts: 684
Loc: Zachary, LA USA
Reg: 01-29-01
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12-23-01 02:12 PM - Post#4268
In response to JSaleska
Excellent questions. When I had a Rossi plank engine, it was happiest (using 10% Omega) on a Rossi R5 plug- which I'm told is definitely on the cold side, like an Enya #5.Chris, why don't you shoot an e-mail to Bob Johnston in the UK and ask him? He has been running low-or-no nitro fuel for a long time and has all of that figured out. Or perhaps Joe Howard will know; I've seen him around here. If you're doing scale, you need to be talking with Joe anyway. BTW, the reason glow plugs are so damned expensive is that the platinum used in the element is only found in two places in the world; South Africa, and Russia. I can tell you that I use Enya #3s in the cool months, and switch to a #4 when it gets hot. I have even used a #5 in August with good results. Jon, OS plugs are okay, but compare the element in one with the element of an Enya plug. You'll gladly pay the extra $$ for Enya. Steve
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Christopher J
Full Time Senior Member
Posts: 3351
Loc: Kansas City, MO
Reg: 11-09-01
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12-24-01 02:21 PM - Post#4269
In response to Steve Campbell
Steve,If you're talking about Joe that has the screen name Vario I have talked with him. He's very helpful and seems to know his stuff. Hope to be doing business with him as I continue to work on my projects this winter. Christopher J
| Christopher J
East Coast Vario Field Rep
Size it up and then scale it down |
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S76GUY
Senior Member
Posts: 343
Loc: NY
Reg: 07-16-00
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12-24-01 02:36 PM - Post#4270
In response to Christopher J
I hope this helps.
Tony T.Standard Rossi Glow Plugs Rossi Glow Plugs are sold and well known in all world. The name guarantee high quality, long life and good performance.
On each glow plug there is the number on it. 10001 R1 Extra hot from 0,8 to 2 cc.
10002 R2 Hot from 2 to 3,5 cc.
10003 R3 Med from 3,5 to 6 cc.
10004 R4 Cold from 6 to 10 cc.
10005 R5 Extra cold for Nitro fuel and RC Nitro 5%
10006 R6 Cold for Nitro 10% from 10-13 cc.
10007 R7 Cold for Nitro 15% from 13-15 cc.
10008 R8 Super cold for Nitro 22% from 15-30 cc.
10010 RC Hot for RC from 2.5 to 6 cc.
10020 RC Cold for RC from 6 to 15 cc.
10011 G1 Hot for R15 speed
10022 G2 Med for R15 speed
10033 G3 Cold for Nitro from 18% to 30% for R15 speed
10044 G4 Extra cold for Nitro fuel from 30% to 15% for R15 speed
10055 G5 Extra cold for Nitro fuel from 50% to 70% for R15 speed -------------------------------------------------------------------------------- R.A. Glow Plugs in Light Alloy Anodized Glow plugs in light alloy anodized in three different colors HOT-MED-COLD. For merit of its material the thermal expansion is nearly the same of the engine so the mixture is better in its tightness and furthermore the glow plug is Hot at idle and Cold at full rating: two essentials conditions now turned reality. 10061 R.A. Hot glow plug for Nitro 5%
10062 R.A. Med glow plugs for Nitro 10%
10063 R.A. Cold glow plugs for Nitro 20% -------------------------------------------------------------------------------- Biturbo Glow Plugs Biturbo glow plugs, made in 5 different types, allows you to increase the performances of your engine. Biturbo glow-plugs has an external conicity for a better capacity, a conical coil (not cylindrical) and a conical hole; so all the coils can be used during the mixture explosion and not only the first one like in the traditional glow-plug. For the different external conicity from the others conical glow plugs, Biturbo can not be used on the competitors engines. 10072 R.B 4 Hot glow plug
10073 R.B. 5 Med glow plug
10074 R.B. 6 Cold glow plug
10075 R.B. 7 Cold glow plug
10076 R.B. 8 Extra cold glow plug -------------------------------------------------------------------------------- TURBO Glow Plugs 10085 R.T 5 candela TURBO medium
10086 R.T. 6 candelaTURBO cold
10087 R.T. 7 candela TURBO very cold
10088 R.T. 8 candela TURBO extra cold -------------------------------------------------------------------------------- New Standard Glow Plugs 4 Stroke 10090 RFS 4 stroke glow plug -------------------------------------------------------------------------------- "ECO USA" Glow Plugs Standard Best quality and best price! 10093 ECO Hot Candela da 0,8 a 3,5cc nitro max 5%
10094 ECO Med Candela da 3,5 a 7,5cc nitro max 10%
10095 ECO Cold Candela da 7,5 a 11cc nitro max 15% -------------------------------------------------------------------------------- Car Team Line Glow Plugs Perfect glow plugs for competition. 10030 Black for nitro al 10% - 15%
10040 White for nitro al 20% - 30%
| Keep Your Rotors In Motion
Tony Tirone |
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Christopher J
Full Time Senior Member
Posts: 3351
Loc: Kansas City, MO
Reg: 11-09-01
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12-24-01 03:14 PM - Post#4271
In response to S76GUY
Good info Tonythanks Christopher J by the way, how is the Agusta coming along?
| Christopher J
East Coast Vario Field Rep
Size it up and then scale it down |
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S76GUY
Senior Member
Posts: 343
Loc: NY
Reg: 07-16-00
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12-25-01 02:00 PM - Post#4272
In response to Christopher J
Hey Chris Merry Christmas.
It is coming out well you will see it
soon I hope. How are things going with your
porjects?
| Keep Your Rotors In Motion
Tony Tirone |
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Staff
Senior Member
Posts: 1510
Loc: Roanoke Va USA
Reg: 03-05-00
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12-25-01 02:28 PM - Post#4273
In response to S76GUY
Hey - Merry Christmas to all!
Save your money a standard K&B 4520 plug will work every bit as good and last just as long as a OS or Enya at a fraction of the cost. Another advantage of the K&B is the Idle bar - when the fuel charge hits the plug after an extended idle, (autorotation etc.) the bar keeps the element at a higher temp to help prevent flame-outs.
When I flew competition - OS and Enya gave me plugs my box was full of them, after an extended test for years in competition and aerobatics I always went back to the 4520.
If you don't believe me - ask Curtis and his dad, I turned them on to the plug years ago and they still use them today. Mike Mas
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Christopher J
Full Time Senior Member
Posts: 3351
Loc: Kansas City, MO
Reg: 11-09-01
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12-25-01 06:23 PM - Post#4274
In response to Staff
Tony it's still coming along. I put a little of work into each of the three fuses as time allows. My Vario Kobold mechs finally came in so I've been working on them. I've noticed the gear mesh feels much more smooth on the new Kobold then it does on the one that has been flown and had the gears "ran in". I think I may have to take the older one apart and see why the gears feel so tight on it still.Christopher J
| Christopher J
East Coast Vario Field Rep
Size it up and then scale it down |
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Steve Campbell
Senior Member
Posts: 684
Loc: Zachary, LA USA
Reg: 01-29-01
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12-25-01 11:08 PM - Post#4275
In response to Christopher J
All due respect to Curtis, et. al., I tried the K&B 4250 and didn't get the same consistency of mixture, flight to flight. Perhaps I run my stuff too rich...Steve
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Moore-VARIO
Member
Posts: 46
Loc: Thousand Oaks, CA. USA
Reg: 12-25-01
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12-26-01 07:14 AM - Post#4276
In response to Steve Campbell
Haven't tried the K&B 4250. Going to have to give it a shot.
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Staff
Senior Member
Posts: 1510
Loc: Roanoke Va USA
Reg: 03-05-00
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12-26-01 12:56 PM - Post#4277
In response to Moore-VARIO
Steve,That is exactly the point - the plug works better when it's rich and it stays lit. That's why I continued to use them. There's also the cost factor - keep in mind that your paying for a plug that has a removable element. The Enya plugs unscrews - some modelers overseas replace the element when they fail. Mike M
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Steve Campbell
Senior Member
Posts: 684
Loc: Zachary, LA USA
Reg: 01-29-01
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12-26-01 02:16 PM - Post#4278
In response to Staff
<<...the plug (4250) works better when its rich and stays lit...>>Didn't for me; that's MY point.<G> Maybe I had a couple of bad ones- who knows? Anyway, I don't mind spending a few extra bucks on Enya plugs, even though I change 'em out every five hours of operation. Compared to the overall cost of the machine, they are cheap insurance. Steve
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Staff
Senior Member
Posts: 1510
Loc: Roanoke Va USA
Reg: 03-05-00
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12-26-01 11:56 PM - Post#4279
In response to Steve Campbell
Wow - Enya must love you!A benifit of running a engine rich is; I only changed my plugs (4520's) every 3 months and they were still working fine. In addition, I never lost a plug in flight!
It's a simple fact - if your using plugs, your too lean. Mike M
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Steve Campbell
Senior Member
Posts: 684
Loc: Zachary, LA USA
Reg: 01-29-01
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12-27-01 03:27 AM - Post#4280
In response to Staff
<<...if your (sic) using plugs, your (sic) too lean.>>Sigh... Right; but who said I was using plugs??? I change them every five hours of engine run time as a preventative measure; which, for me, works out to every couple of months. I've never lost an Enya plug in flight- can't say that for some other brands. The only time I've EVER fried an Enya plug, in four+ years of using them, was on that cheap-ass Chinese Leo engine I tried in my baby Sluggo. And that was probably due to machining residue in the crankcase, since the element was well and truly trashed. Served me right for not looking first... How this went from a dissertation on plugs to me running my engines too lean is simply amazing; nature of the beast, I suppose. Steve
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Dyehard
Senior Member
Posts: 272
Loc: Richlands, Va.
Reg: 01-27-01
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12-27-01 03:05 PM - Post#4281
In response to Steve Campbell
This can be looked at anyway one wants. According to Curtis, as of a few years ago, he uses the K&B plugs for practice, but for competition, he switches over to Enya #3's. I haven't asked him in a few years if he still does that, didn't have no reason to, but knowing Curtis, if it worked good then, he is still doing it. He must have had a reason to do so at that time.
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Staff
Senior Member
Posts: 1510
Loc: Roanoke Va USA
Reg: 03-05-00
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12-27-01 03:39 PM - Post#4282
In response to Dyehard
Steve,In your reply: "All due respect to Curtis, et. al., I tried the K&B 4250 and didn't get the same consistency" The correct plug number is "4520" Maybe that was the problem! Mike
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