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Cox Engine of The Month
November-2017
MauricioB's

"Cox Tee Dee .010"



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BOXER BEE design

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BOXER BEE design

Post  coxaddict on Mon Dec 07, 2015 4:00 pm

1/2A Nut wrote:The Killer Bee back plate should add some extra air in perhaps run on a bladder to keep the pressure up may help the front piston get more of the mix. Do you have any pics of the modified crank? Would take away from the all metal look but could
give you a runner for a project.

Hi 1/2A,
I use 3 crankshafts to build a twin in a very unorthodox manner. Huh...   A car crankcase and crankshaft which is a scarce part is used for the rear assembly. This allows a turned down bee crank to fit in a bored out car crank.  What? Connecting the front to the rear crank is the weak link in the design, I feel.   With the basic design I also built an inline twin, shaving the heads and fins down for clearance. It runs the same as the Boxer Bee.  Embarassed
The design is modular which would enable a number of crankcases to be screwed together. I have several mods I would like to do with the design to improve air/fuel flow to the front cylinder.  I'm even thinking of adapting the reed/carb assembly from an .074 R/C.  The first designs were built using a drill press and a mini lathe.  I have since picked up a used mini mill and am slowly adding needed accessories to use the mill. (expensive)  Surprised
 My other hobby, repairing guitars has kept me from spending any more time on design and development of my engines.  I will share with CEF members the build and design once reliability is proven.  
Aloha,
Agustin
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Re: BOXER BEE design

Post  ARUP on Tue Dec 08, 2015 7:53 pm

Any pics of it unassembled? Cool engine. Saw the pic of it elsewhere(?).
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Re: BOXER BEE design

Post  1/2A Nut on Tue Dec 08, 2015 11:29 pm

Thank you Agustin,

Where the keyed parts bolted in to make the engine far running counter clockwise to reduce the chance
of the crank coming apart? Do you have any pics of the crankshaft? Small Cox Logo
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Re: BOXER BEE design

Post  coxaddict on Wed Dec 09, 2015 3:04 am

Thanks for your interest.
I took the engine apart for pictures and did not clean anything. Sorry I won't reveal the crank pin until the engine proves reliable.



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Re: BOXER BEE design

Post  1/2A Nut on Wed Dec 09, 2015 9:10 am

Awesome sauce thank you for sharing Agustin,

It would be great to have a factory made boxer engine case kit with .049's and
a RC carb or twin exhaust throttles. I voted on your engine the other day, if
you get to a happy point with performance post a running vid.  

Nice build thread here:
https://www.coxengineforum.com/t3152-my-twin-bee

And his vid here:



And vid of:
Here is Ross Purdy's effort:



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Re: BOXER BEE design

Post  WingingIt74 on Sun Jan 03, 2016 5:47 pm

Looks interesting....

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Re: BOXER BEE design

Post  coxaddict on Mon Jan 04, 2016 12:33 am

Making mods to design. Will try to build a C/L plane to test.
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