Ralphbf

My Feedback: (27)

I have these, They are to large.
I need a smaller size. I don't have the plug here but I think it's 14mm.

It takes a CMR7A

RysiuM

My Feedback: (1)

Actually because of higher temperature for the running engine the resistance of the glow plug is higher and that means the current is lower. This makes the battery tun longer. Actually for testing I use C-size 3300mAh.

Thanks AV8TOR for the info. Now when I know how the engine behaves, will try to "burn" the plug. I will run the easiest and most efficient mixture - the "lean one". If cheep glow will last longer than 4 tanks at full throttle (the worst case scenario) I will go for it. I mean it would be good to last longer, but who is going to stay by this loud engine for more than hour.

RysiuM

My Feedback: (1)

On the other note, how can I cut the "spark plug" thread? I have mini lathe so I can make my own adapter entire from scratch, but I'm not sure how to make that thread (I'm not a machinist, just skilled hobbyst)

Ralphbf

My Feedback: (27)

The body is made out of aluminum, not the most desireable.

I'd need to weld a rod in it then drill and tap it.

The glow plug is 1/4 32. None of the hard ware stores in town, Woodland, have one.

I posted on the old "Who's building Toro" thread and tried begging for one over there.

My brother in-law is a retired machinest, but I hate to go over there and ask.
It seems like the only time I go there is to ask favors, go figure.

I don't know if I can get a die for the thread on the spark plug and I haven't been able to locate the tap for the glow plug.

It would be easier to put the flywheel back on it and run it as a mag.[&o]

RysiuM

My Feedback: (1)

Ralph,

I got 1/4 32 Tap from RC Country $6.99 some time ago. You might call them to check if they still have it.

As for remote glow driver, I saw on RCU something called "Micro-Glow" from guy "Wda pres". Never heard of it. Is it related to Woodland Club? (The instruction for it is on Woodland club's page).

Ralphbf

My Feedback: (27)

That would be our 1 time pres.

Not impressed with him or his stuff and yes I do own some of his stuff.

I have a glow driver that doesn't seem to want to work right even with a 3500MA battery
on a single glow

I'll check out RC Country or Air Bourne hobbies and see if Jeff has one on Tuesday.

av8tor1977

My Feedback: (6)

Ok, here's a cheat that will get you going for now if you want. Go ahead and make an adapter and drill and tap it for standard 1/4 x 28 thread. Then take a glow plug and grind a vertical groove in the threads that looks like the grooves in a normal tap. Then use the glow plug "tap" and use it to "modify" the 1/4 x 28 threads into 1/4 x 32. I know, it's a sloppy way to do things, but I did it in a pinch once and it works. At least until you can get a proper adapter or tap and do it right....

AV8TOR

captinjohn

Ever see a glow plug og flying by...like a bullet!!! Capt,n

RysiuM

My Feedback: (1)

He, he ... I did, I did. It was before I made a flange for the threaded insert in the gutted spark plug. I can tell, It was noisy The good news is, that few days later I found that gow plug

av8tor1977

My Feedback: (6)

Actually, though it is surely a "cheat" way to do it and not proper, the plug will stay in. It works because the 1/4 x 28 and the 1/4 x 32 threads are so close. Just use it in an emergency and get a proper adapter or make one as soon as you can and you'll be fine.

BTW, don't use the glow plug you modify into a tap. It is only used to "tap" the threads...

AV8TOR

captinjohn

Be sure to try em in a 16 cylinder Radial glow ingine.....should be exciting!!! Capt,n

RysiuM

My Feedback: (1)

Just for the sake of fun I tried to make my own glow adapter. First of all I didn't have 14mm 1.25 die. But I figured out, that metric thread 1.25mm is close enough to imperial 20tpi. This thread I could set on my mini lathe. I never made thread on lathe before, but that's the chalange.

I bought one 3/4 machine screw for material (nice piece of steel rod). Few hours of fun, and here is the result. It weights 15 grams. The glowplug is sticking out enough for any king of clamp. I didn't bother to cut hex for the wrench, as I can use pliers - it is one time deal anyway as I would change only glow plug, not the adapter.

KI8FR

I played with some fuel to day.. just to see what I can get out of my enging. What I did was mix a bach of 10/17 2:1 gass ran the enging it ran good but just did not seem to have the punch that the 15/17 had. So I mixed up a bach of 15/17 2-1/2:1 gas. That did it nice. I did not think that the plug was stay light but it did.. ran grate and idled slow. It was not as ez to start. that was the only bad thing with it.. THe oil was a little messy but that was it. I do not have a tack yet but when I get one I will let you know what the engine is doing.

Now this is not a homie or a convertion enging. it is a us 25cc enging.. I do not know what kind of diftrance there is but the fuel that I was running to day worked grate for this engine.. Tomorrow when I get home from work I will be puting my gow/gas on a quadra 40cc to see what it will do on that enging...


Paul

Ralphbf

My Feedback: (27)

So Paul you ran 2 1/2 parts gas to 1 gart glow fuel?

How much did you mix up?

This is kind of addicting isn't it !

KI8FR

Yes I did 2 1/2 gas to 1 part 15/17 glow. I mixed up about a 15oz tank full. and yes it is addicting. It is alot of fun.. The thing is I put alot of $$$ in cdi units for my gassers now the glow will give me more power and do not have to play with bateris or have more gliches. The bad thing about this mix is the enging was not very ez to start. I was not able to do it by hand.. I had to make a started out of a cordles drill. It worked ok.

Paul

Ralphbf

My Feedback: (27)

There are guys who clain 2 to 3 flips and their Gas Glow start right up.
AV8TOR is one of them.

I use a started on everything. I have a 24v Sullivan that does a pretty good job.
Although at times I have found it lacking. The batterys need to be freshly charged on bigger stuff.
Like my 32cc Super Tigre converted to diesel.

I believe with good tuning Gas Glow would be just as easy to start as a glow engine.
And I have some that flip start very easy.

av8tor1977

My Feedback: (6)

Yeah, two or three flips with the choke shut and the throttle cracked and they start momentarily. Then choke open and a few flips and away it goes. Sometimes in reverse though. If that happens more than once, I get aggravated and grab the starter and off it goes immediately in the correct direction. Sometimes a back flip against compression will get it going in the proper direction. Be careful because if it takes off in reverse with much throttle opening it can move backwards on you if it's the plane is not restrained in both directions. Once they are started, subsequent starts are usually one flip.

AV8TOR

RysiuM

My Feedback: (1)

It is the same with my Poulan. First start often needs starter. It looks like there is a long way for fuel from the carb to to the glow plug[]. One it is shut off after running the start takes no more than few flips. I noticed sometimes when throttle position is on idle it doesn't run but bounces forth and back - it sounds like it's running but it is not. There is 50-50 chance it starts forward, but of course because of Murphy's law, it starts 90% backward

KI8FR

This one is hard to start just coz of the 2.5:1 fuel... When I did it with 2:1 it would start with 2 or 3 flips, but like av8 said it will run the wrong way.. Then i just flip it the wrong way and it will start to run the right way. lol..... I have just been playing with the engins as of right now.. I hope to get one on a plane and see how it will do in the air.. I think they will do grate. but I have been haveing a grate time doing it...

Paul

av8tor1977

My Feedback: (6)

Glad you are enjoying yourself. Me too!

It's great fun to tell people the engine on the plane(s) are from a weedeater or a chain saw to begin with. Then when you tell them you threw the spark plug and ignition system away and put in a glow plug their eyes REALLY get big.

AV8TOR

hammer 50

My Feedback: (17)

Can someone tell me the best mix ratio glow/gas? I have an older quadra 35 that runs great on gas but have tried some of these mixes with no luck.Iwas using a starter but could only get intermitent very short runs.It has to be fuel mix because varied carb settings and types of glow plugs did not help? I thought I had screwed something up went back to original settings and gas and runs fine? any help would be greatly appreciated. Right now this is more work than fun!

Ralphbf

My Feedback: (27)

The basic mix is 1/3 10/10 glow fuel 2/3 high octain gas.
Make sure your battery for your glow stick is fully charged.

As you have read one man here has had better luck with
1 1/2 parts to one part glow.

So what have you tried so far?

KI8FR

I have been running my us and quadras on 15/17 glow and on hi 93 gass. I have been doing it with 2:1. 2 pars gas and 1 part glow.

I just did some testing with 2.5:1 but the engine was hard to get started. Try the 15/17 2:1 and see how it will do.. I have seen on this list that ppl have been running 10/10 2:1 but I can get the fuel were i am at..

the 15/17 has alot of oil in it but it did not seem to be a prob. with the 10/17 the enging did not have the power as the 15/17. and the engine was not geting hot or detanation. (i cant spell sorry) So from what i have been geting out of my us and quadras was that the 15/17 2:1 what about the best all around.. but that is just me.. allot of ppl has been haveing good lick with otheres. The only way you are going to find the mix that you like is to just play...

One thing I did find was that you have to run a so F glow plug.. all the othere plugs just do not get it done.

Paul

hammer 50

My Feedback: (17)

Thanks for the info,I was using a mix I found earlier in these posts using 20-20 mixed 1-1 methanol then two parts high test gas.Too many variables, My daughter got me some laboratory grade methanol that may have been different stuff. She likes to see me tinker[blow up stuff]. I like your mix and might get achance to try it later today.
Those 1/4-32 taps are Harry Higley#GPT014 but I had to order mine through Tower by why of local hobby shop.
I will try this and let you know,thanks again

hammer 50

My Feedback: (17)

My neighbors hate you guys. I couldn't wait till this afternoon so I mixed per your formula with a new fplug and gave it atry. Spinning with a starter after choking it fired right up ! Surprised me and everybody else in the neighborhood. I didn't want to push my luck and create a neighborhood incident but ran long enough to see it would idle about 2000 without battery on plug and turn over 7500 with a 17-6 probably wrong prop.
What have you found your carb adjustments to be ? At idle I did notice a considerable decrease in rpm when igniter was removed.
As you can tell I am hooked. thanks again Jim