IF YOU HAVE A COX .049 ENGINE LAYING AROUND WITH A BURNED OUT GLOW HEAD AND YOURE HAVING TROUBLE FINDING A NEW ONE THEN TRY THIS. DRILL A HOLE IN THE CENTER OF THE HEAD AND TAP SOME THREADS IN IT THEN SCREW IN A O.S.-A,3 GLOW PLUG AND IT WILL RUN LIKE A TOP I MUST SAY I WAS IMPRESSED WHEN MY SON DID IT AND IT WORKED SO WELL . I JUST THOUGHT THE ENGINE WAS READY FOR THE BONE YARD.

The Cox glow plugs are readily available and a replacement head that uses a standard glow plug has been around for years. You were lucky. trying to get the plug the exact depth for the correct comprssion is about impossible. We have been trying the drill out the old head and tapping for a standard plug for at least 40 years.

You don't just tap some threads into it. The thread is a 1/4x32 and difficult to find. Higley sells one.

Cox glow heads are available but expensive. The only real problem with tapping for a standard plug is that it messes up the combustion chamber shape and you'll lose maybe 1500 or so revs but it's a good fix if top revs aren't a major concern. Norvel heads will fit in the Cox and are said to give more revs as well. The preferred cure nowadays though is to get a Galbreath head and use a Nelson plug. Go to https://ssl10.mysecureserver.com/kit...dex_store.html and click on Glow Plugs.

I'm not an expert on Cox engines but I'd read about all this over on SSW so I just did a search to find the information.

Cox Babe Bee Glow plugs cost $8.98 which is about a buck more than an OS type "F". You can find them On E**Y for less.

Why are they hard to find, did cox stop making glow engines ???

Try going to the Cox web page.

There are lots of solutions, jump over to the "1/2A and 1/8A Airplanes" section.

George

The easiest is to just buy the correct part. How much easier can that be?

$9 and it's yours

http://www.coxmodels.com/prodinfo.asp?number=C00325

See Jim showed you the web page I talked about. Just go there and buy one. You can get the engines cheap too.

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Several vendors used to sell just such converted Cox glow heads quite regularly. The downside was that the engine did not produce quite as much power using the modified head. Sport flyers of these engines were not concerned with the slight power loss and enjoyed the cost savings.

I have a few I bought from Sheldon's they work well and turn as fast as a stock plug.

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It's not worth while paying $9 for the glow head. If you go to another page on that site
http://www.coxmodels.com/prodinfo.asp?number=008901 you can get the complete engine for $7.

I saw that but thought they were just talking about the spring starter?

GENTLEMEN THANK YOU FOR YOUR FEEDBACK...AS YOU CAN SEE MY LACK OF EXPERIANCE AS ME FEELING LIKE A SITTING DUCK RIGHT NOW. I'LL DO MORE READING AND LESS POSTING FROM NOW ON..

That's what I said, the enines are cheap. We bought a bunch at that price and sold the plugs separately and what was left of the engine on the E**Y. Got 5 bucks for the plugs and up to 15 bucks for the rest of the engine as parts

Thanks for your post Ron. That was good information and some of us do find it useful. I don't know why these guys feel they have to jump all over you.

I've read all of the posts in this thread. I don't see where anyone is yelling at you or giving you a hard time.

Post any time you feel like it.

Nah, you're not a sitting duck at all. You tried something and it worked so good for you, most would just go buy a new one. The first time I wanted to make a plug thread I couldn't find the right tap so I ended up making my own. It worked fine but then I found the right one later on. As with just about anything discussed here there's usually several ways to do things and some get rather forceful in pushing their own ideas. Post away

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The Tee Dee using crowd found the converters down on power. I doubt that the sport engine crowd did.

TD crowd?? let's see, I have two Kombat Kittens with a TD 049 and a TD051. A Lil Satan with a TD049. I also flew 1/2A speed when younger. I also flew a little 1/2A pylon racer with a TD 051. I guess that might make me part of the "TD crowd". I found very little loss of power using the glow plug adapter. I used a hot plug and high nitro fuel (Cox Red can). Still DO.

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Don't argue with me, go find them and argue with them. I'm just repeating what they said in the model mags in the Seventies and Eighties. Personally, I hate the sound the little buggers make so much that I haven't ran an .049 since I ran my OK Cub .049 Diesel twenty or thirty years ago. Now that was a good sounding .049. <G>

By the way, I was referring to the 1/2A speed crowd that flew in national competition. You wouldn't know anything about that, would you?

Oh I don't know. I might have flown 1/2A speed at the 1963 Nats at Los Alamitos Naval Air station. Wait I DID, and B speed and AMA combat.

Who is this Nebulous "they" you quote? Seems like I might be one of them.

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Well, that cinches it. The other guys I'm quoting must have been bozos.

Sounds like it. You don't even know their names. Just the old nebulous "They". Usually when you quote someone you know who you are quoting. Otherwise it's just heresay.