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The twins strike again! Cox_ba12




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Cox Engine of The Month
September-2024
F4D Phantom II's

"Surestart .049 geared opposed twin"

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Post  Oldenginerod Thu Oct 12, 2017 7:51 pm

Not Cox, but interesting.  Looks like the real deal.

http://www.ebay.com/itm/Very-Nice-Home-Built-OK-Cub-098-Nitro-Oppsed-Twin-Model-Engine-W-Flywheel-/372099469497?hash=item56a2db50b9:g:FNAAAOSwyXhZ2sQO

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Post  MauricioB Fri Oct 13, 2017 4:28 am

Oldenginerod wrote:Not Cox, but interesting.  Looks like the real deal.

http://www.ebay.com/itm/Very-Nice-Home-Built-OK-Cub-098-Nitro-Oppsed-Twin-Model-Engine-W-Flywheel-/372099469497?hash=item56a2db50b9:g:FNAAAOSwyXhZ2sQO

The twins strike again! Twin10

They seem to be OK (USA) engine cylinders, right?
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Post  Oldenginerod Fri Oct 13, 2017 6:01 am

Yes Mauricio. OK Cub .049 cylinders. I have seen this done with Cox parts before but never with OK Cub parts. It seems that the engine is built correctly to run, whereas many that we see on ebay are not able to run.

Rod.
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Post  MauricioB Fri Oct 13, 2017 7:23 am

Oldenginerod wrote:Yes Mauricio.  OK Cub .049 cylinders.  I have seen this done with Cox parts before but never with OK Cub parts.  It seems that the engine is built correctly to run, whereas many that we see on ebay are not able to run.

Rod.

If it's true Rod, it seems that this works, it would be great if there was a video, even help the seller.
I have an OK, I give it to a friend, it is an engine with very little use, but I have no manual, what is the ideal fuel for this engine? Do you know?

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Post  Oldenginerod Fri Oct 13, 2017 5:09 pm

The best fuel would be the same as for your Cox engines. It should include castor oil and no more than 35% nitro. If you try to run the engine with more nitro something may break. My opinion on ideal fuel for these engines is, 20% oil (1/2 castor) and 15% nitro. Don't load the engine up too much. The needle valves on OK engines are very blunt so are difficult to adjust accurately. Extra nitro may help stabilize the adjustment.
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Post  MauricioB Fri Oct 13, 2017 10:30 pm

Oldenginerod wrote:The best fuel would be the same as for your Cox engines.  It should include castor oil and no more than 35% nitro.  If you try to run the engine with more nitro something may break.  My opinion on ideal fuel for these engines is, 20% oil (1/2 castor) and 15% nitro.  Don't load the engine up too much.  The needle valves on OK engines are very blunt so are difficult to adjust accurately.  Extra nitro may help stabilize the adjustment.

Thank you very much for the information, when I march you promise to show the operation! Thumbs Up
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