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"Cox Tee Dee .010"



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Die Cast 049's

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Die Cast 049's

Post  Sig Skyray on Sun Jun 14, 2015 7:09 am

Has anyone successfully mated a 5cc babe bee integrated tank with a circlip reed retainer to a die cast block? I'm leaking nitro profusely with 2 gaskets.

OR, an 8cc tank with a flanged reed retainer?

Thanks. I picked up 3 new sure starts with die cast on ebay cheap. The picture showed extruded then Dan in California sent me die cast. I complained a bit but kept them for the price. They turn some really good RPM's.

Greg
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Re: Die Cast 049's

Post  KariFS on Sun Jun 14, 2015 11:25 am

There was one cast case engine model with an integral tank, namely the R/C Bee:

http://coxengines.ca/cox-.049-rc-bee-engine-2.html

Maybe you could source a used tank or a complete worn out engine cheap somewhere?

I have no idea how these tanks perform compared to sure start backplate. I have one complete (I think) tank but no cast crankcases. I compared the reed retainer area of the RC Bee tank and a regular one, the difference in the diameter of the two is about 1.5 mm, and the round part has two flats, presumably to make room for the piston to reach BDC.

Maybe, just maybe, you could make your circlip version of the bee tank fit by getting one of these kits:

http://coxengines.ca/cox-.049-engine-tune-up-kit-die-cast.html

The idea is that you would take the red part and use it as a spacer between the bee tank and the cast crankcase, and in this kit you will get the correct cast case gasket too. Just use the original circlip to hold the reed valve. Please note that this is just speculation, I do not know if it would work.

I'll see how much the shipping would bee for the RC Bee tank if you are interested.
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Re: Die Cast 049's

Post  pkrankow on Sun Jun 14, 2015 7:35 pm

http://coxengines.ca/8cc-fuel-tank-conversion-for-cox-049-engine-aluminum.html
this might be easier. If you want stunt then there should be a stunt tank like this too.

My results were mixed. I made gaskets for a circlip tank. I never got a steady run, but it did run. I suspect that I had an air leak somewhere.

Phil
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Re: Die Cast 049's

Post  Sig Skyray on Mon Jun 15, 2015 11:51 am

Thank you guys. Those are some good suggestions. I'll experiment.

Greg
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