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Post  czarobest on Sat Jun 06, 2020 11:41 am

I recently bought two Coxes Smile. I've renovated and cleaned them a bit. So, first one is Cox Babe Bee 049 Thimble Drome (it was in a little better condition than the second engine), I changed the oring in tank, and I polished few parts. Cylinder and piston is in good condition, only the reed valve is in poor condition, so I must buy or make a new one.

My "new" old Coxes :) Cox_ba13
My "new" old Coxes :) Cox_ba15
My "new" old Coxes :) Cox_ba14

More photos before/after cleaning is in album - https://photos.app.goo.gl/NDxRh6gZbjGYa34V9
And video, engine reaches 16 000 RPM with 5x3 prop and 20% nitro fuel:


The second engine is maybe more interesting but I will show it within a few hours or tommorow Smile.
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Post  MauricioB on Sat Jun 06, 2020 12:50 pm

congratulations you have done a beautiful job, your engine looks NEW! brilliant!
It also works wonders !!
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Post  happydad on Sun Jun 07, 2020 12:20 am

czarobest wrote:I recently bought two Coxes Smile. I've renovated and cleaned them a bit. So, first one is Cox Babe Bee 049 Thimble Drome (it was in a little better condition than the second engine), I changed the oring in tank, and I polished few parts. Cylinder and piston is in good condition, only the reed valve is in poor condition, so I must buy or make a new one.

My "new" old Coxes :) Cox_ba13

What did you use to polish the tank, crankcase, etc.? What kind of polish, and or brush?
   Happydad RC Plane Huh...

P.S. look great.
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Post  czarobest on Sun Jun 07, 2020 2:38 am

MauricioB wrote:congratulations you have done a beautiful job, your engine looks NEW! brilliant!
It also works wonders !!

Thanks Smile

happydad wrote:
What did you use to polish the tank, crankcase, etc.? What kind of polish, and or brush?
Happydad RC Plane Huh...
P.S. look great.

Thanks too Smile. I used a abrasive polishing paste (like on picture) with Dremel rotary tool with felt pad.
My "new" old Coxes :) Bez_na10
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Post  czarobest on Sun Jun 07, 2020 5:02 am

Okay, so it's time for second engine Smile. It is Space Bug Jr. Very Happy, in my opinion this engine is from first series of Space Bug Jr. because its has two reeds in valve system. One of these is really thin and flaccid, second is thicker and stiffer. The tank is transparent which is pretty cool Very Happy. Unfortunately tank is in bad condition and needs seals that I made of orings made for watches. It does not leak Smile. Also I replaced small oring in tank. The crankshaft was rusty combined with castor oil, but I restored it to great condition Smile. Of course, I cleaned the rest of the engine thoroughly and now engine looks really good Smile. I like the look of this engine and I'm glad to have one of the first Cox engines  Cool

Additionaly I have tank from normal version of Space Bug (without Jr.) but without needle and valve system, maybe someday it will come in handy Smile

All photos (before/after/inside) of the engine is here: https://photos.app.goo.gl/QgKobCnA2rXbYyat6

My "new" old Coxes :) Cox_sp11
My "new" old Coxes :) Cox_sp10

And video, prop 5x3, fuel with 20% of nitro and engine reaches about 15 000 RPM. There was a slight problem with the spring, which acted as if it was jumping and set the needle be leaping, which made it a little difficult to adjust, but this is to set up Smile.


And here's my current collection of Coxes  Very Happy
My "new" old Coxes :) Coxes10
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Post  Kim on Sun Jun 07, 2020 6:47 am

Great Looking Engines and Engine Work!!!!! cheers cheers cheers Airplane Airplane cheers cheers Thumbs Up Thumbs Up Thumbs Up
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Post  getback on Sun Jun 07, 2020 6:49 am

Nice job czarobest The restores look good !! The Jr. is one of my favorite engines because they come in difft. flavors (colors) I see you have the early version with the smaller glow thread . If you don't know there hard to come upon its good yours is working and also did you notice the three pieces con. rod ball joint connection ? Your collection is looking Good ! Small Cox Logo Babe Bee .049 Small Cox Logo
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Post  czarobest on Sun Jun 07, 2020 7:16 am

Thanks guys Smile.

In Space Bug ball joint is little different from Babe Bee, but I don't quite understand why this is a three-part construction  Huh.... Unless, my piston is from newer version because it is coated with copper?
My "new" old Coxes :) 20200610
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Post  getback on Sun Jun 07, 2020 9:38 am

Hard to tell but the one on the right looks to bee .. look here ,., https://www.coxengineforum.com/t11682-finally-a-cox-three-piece-piston?highlight=space+bug+three+piece Very Happy
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Post  czarobest on Sun Jun 07, 2020 10:15 am

Thank for help and link!
From that topic I conclude that it is Babe Bee from first post of this thread that has a three-part construction piston, and Space Bug has a newer kind. I didn't change them, but maybe the previous owner changed them Huh....
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Post  getback on Mon Jun 08, 2020 6:55 am

I believe they were swapped at one time , the words Thimble Drome on the BB tank was on out a few years i think around the ?? I was tring to find my info but can't seem to produce it at this time ? Here is more info if you haven't seen it before ,,,,  https://en.wikipedia.org/wiki/Cox_model_engine#Standard_Bees  Small Cox Logo  Here is the pick i was looking for >scroll down a little >> https://www.coxengineforum.com/t8739-cox-049-marked-with-thimble-drome?highlight=the+words+thimble+drome+on+tanks It is a good chance you have a very old bee there !!


Last edited by getback on Mon Jun 08, 2020 7:15 am; edited 2 times in total (Reason for editing : add on)
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Post  czarobest on Mon Jun 08, 2020 7:51 am

Thank you! I can replace the cylinder and piston between these engines, because I want them to be as correct as possible, but I would have to be 100% sure Razz
I know the link from wikipedia, but I haven't seen the forum topic, and it's very helpful - thanks  Smile .

The more I'm satisfied with these engines, because thanks to them and you, I'm learning something new about the Coxes  Smile . I love all the engines, but I like that Babe Bee may be older than I thought  Laughing
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Post  NEW222 on Mon Jun 08, 2020 5:35 pm

Well... Nice engines, nice clean up, great pictures and videos. Oh, and also a very nice collection!
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