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1/2A Nut's

"TD .020 RC"

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Post  ticomareado Sat Oct 05, 2013 4:12 pm

It's a fifties model with new style head, narrow taper nose crankcase, and large NV dial.

The con rod needs re-sintering into the piston but it is too fat to slide into the groove of the Cox factory sintering tool. Any advice? I'm not a machinist and have limited tools/skills.
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Post  ian1954 Sat Oct 05, 2013 4:22 pm

Take care!

This may be one of the older pistons. The three piece piston. Don't use the tool on this.

https://www.coxengineforum.com/t370-1956-3-piece-piston-babe-bee-hits-13680



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Post  crankbndr Sat Oct 05, 2013 4:25 pm

Does it look like this inside?

Newly arrived eBay purchase of Baby Bee .049 Img_0610

Newly arrived eBay purchase of Baby Bee .049 Img_1710
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Post  ticomareado Sat Oct 05, 2013 4:43 pm

Pretty much except that skirt wall is noticably thinner and I can't spot the R/H side on exterior portion of sintering race like in your photo. No telling what kind of cobble job this thing is.
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Post  crankbndr Sat Oct 05, 2013 4:55 pm

There is a snap ring that holds the rod keeper in place, you can see it better in the first photo.
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Post  ticomareado Sat Oct 05, 2013 5:03 pm

That's it. Do you work for NSA? What do I have?
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Post  crankbndr Sat Oct 05, 2013 5:08 pm

You could have one of these, very early Bee, does the tank have Thimble Drome stamped in

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Post  ticomareado Sat Oct 05, 2013 5:26 pm

It looks just like yours (except not as nicely polished up) w/o TD tank engraving and has a mesh screen over air intake and MADE IN USA embossed in air updraft chamber. Discoloration on backplate suggests that it was originally supplied on a plastic Ready To Crash plane that had landing gear not clamped to firewall by engine. (or a Proprod car)

Simple single intake port with NON-SPI too.
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Post  crankbndr Sat Oct 05, 2013 5:52 pm

Mine would not run steady, never got it tuned right, funny I had to flip it backwards to run it forward. Every time I flipped it the right way it ran backwards.

https://www.youtube.com/watch?v=GD4EXrLTAyQ
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Post  ticomareado Sat Oct 05, 2013 6:39 pm

Does yours have SPI? What is you fuel mix in the Youtube run?
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Post  ticomareado Sat Oct 05, 2013 6:48 pm

Have you tried putting silicone fuel line on NV to seal air bleeds out? Other reeds?
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Post  crankbndr Sat Oct 05, 2013 8:08 pm

I only ran it once, now its a shelf queen with my very old Golden Bee. I always run 25%N 20%C on a 5/3 prop.
Neither have SPI.
https://www.youtube.com/watch?v=sIEo6xxIVn4



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Post  ticomareado Sat Oct 05, 2013 9:45 pm

I never knew such a thing ever left a Cox factory.
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Post  ticomareado Mon Oct 07, 2013 3:25 pm

Got it running a fairly steady 11.4 to 11.5K on 6-3 Cox black nylon despite a bent NV. Easy to handle. About 2.5 min. on a full 5cc tank. It might be a candidate for a Texaco engine. What's the fuel formula for Texaco anyway?
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