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Cox Engine of The Month
February-2024
1/2A Nut's

"RC Speed Boat Power Drive TD .020"

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Mock .020 store display engine. Empty Mock .020 store display engine.

Post  bigjimpitz Thu Aug 05, 2021 11:09 am

Hello Cox experts. I need some help identifying this engine. I read or saw some info on an engine like this a long time ago. I’m almost certain it was a mock engine for hobby shop displays. Wether just as an engine display, or in a plane etc, I am not sure. It has an uncut cylinder with no piston. The crank is also uncut, with no connecting rod pin, just a solid cylindrical block. It spins when prop is turned. ┬áIf anyone can enlighten me I sure would appreciate it.


Last edited by bigjimpitz on Thu Aug 05, 2021 11:33 am; edited 2 times in total
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Post  bigjimpitz Thu Aug 05, 2021 11:22 am

Mock .020 store display engine. 0ba1e410
Mock .020 store display engine. 0ba1e410
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Post  bigjimpitz Thu Aug 05, 2021 11:27 am

Closer look
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Post  bigjimpitz Thu Aug 05, 2021 11:28 am

Mock .020 store display engine. E2bc7f10
Mock .020 store display engine. 8646d710
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Post  Admin Thu Aug 05, 2021 12:11 pm

That's an interesting piece. Uncut cylinders can occasionally be found as supposedly they were sold to people to built custom performance engines. A good number of the unfinished parts were likely leaked from the factory over the years with engineers and executives bringing parts home, etc. Within the past decade or so, a few parts lots have appeared on eBay that were full of R&D unfinished or prototype parts.

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Post  bigjimpitz Thu Aug 05, 2021 4:09 pm

Thanks for your answer. I was almost sure I saw or read of a display engine much like this one. The more people I talk to about this engine, the more answers I get much like yours. I’m starting to think that this is exactly what you mentioned… either factory workers grab, or discarded material from factory that people have salvaged! Thanks! Pray
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Post  davidll1984 Thu Aug 05, 2021 5:13 pm

Is this cylinder inside finish ?? Can we insert a piston inside ?I have never seen one of those uncut cylinder I'm curious Huh... Very Happy Small Cox Logo Babe Bee .049
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Post  bigjimpitz Thu Aug 05, 2021 5:52 pm

The cylinder is hollow, but looks like it was stopped short of a few steps of completion. A piston will not fit in as the hole hasn’t been taken to thaw proper dimension. I placed a regular.020 cylinder on the right for comparison.
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Post  bigjimpitz Thu Aug 05, 2021 5:54 pm

Mock .020 store display engine. A5b55d10
Mock .020 store display engine. 0550d310
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Post  getback Thu Aug 05, 2021 6:45 pm

The whole thing don't make since , there is no carb either .. Like 1/2 Pee Wee and 1/2 TD Maybe Mud will check in and fill the gaps ?! Small Cox Logo Very Happy Small Cox Logo
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Post  Mudhen Fri Aug 06, 2021 4:07 pm

.


Last edited by Mudhen on Thu Nov 18, 2021 11:51 am; edited 1 time in total
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Post  Admin Fri Aug 06, 2021 11:56 pm

Was this engine on eBay at one time? I know I've seen it before.

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