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Cox Engine of The Month
February-2017
Mark Boesen's

Twin-Needle Cage Mount Thermal Hopper



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CEF Traveling Engine

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The Traveling Prop

Tee Bee build

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Tee Bee build

Post  coxaddict on Tue Nov 03, 2015 10:07 pm

Thanks for your interest.  
The engine posted in the Cox Engine of the Month is my first prototype.  It was designed to improve consistent running of a Bee style engine.  The venturi  internal diameter is sized for proper fuel draw on suction.  The TD crankshaft/ front housing is mounted like Enya engines, using 4 screws.  The engine was designed and built without drawings.  Everything new was hand fitted. A No. 1 cylinder and low compression head was used for break in.   The engine was run using 10% nitro and a 6x3 prop.  RPMs was a steady13k.  

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Re: Tee Bee build

Post  cox24711 on Wed Nov 04, 2015 1:05 am

very cool

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Re: Tee Bee build

Post  1/2A Nut on Wed Nov 04, 2015 3:48 am

Looks like a fun build wtg  Smile  

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Re: Tee Bee build

Post  fit90 on Wed Nov 04, 2015 7:30 am

Very nice work! It looks great!

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Tee Bee build

Post  RK Flyer on Wed Nov 04, 2015 7:41 am

I noticed a spring in the fuel supply line , have you tried this before on Tee Dee engines?
I've had trouble getting my TD to draw fuel from a tank.

Nice looking work!

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Re: Tee Bee build

Post  getback on Wed Nov 04, 2015 7:57 am

NICE!! you did a very good job on the machining and looks thought out to what you wanted , 13K is a good start out with a steady run with only 10% nitro . Thumbs Up getback

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Re: Tee Bee build

Post  coxaddict on Wed Nov 04, 2015 1:30 pm

Thanks for all the compliments.
The hardest part in this build was deciding what steps to take machining the parts. I am not a trained machinist and any one with a lathe and mill can build one. It all starts with an idea, and CEF fueled the fire!
After watching Rusty's demonstration on the spring verses no spring I felt that having one in there should help keep fuel in the line. Never thought of using it on a tanked TD though.
I also have Cox based twins both geared and grafted case. All are prototypes and all are designed to be flown.
will post in the future. Flying

Mahalo
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Re: Tee Bee build

Post  getback on Wed Nov 04, 2015 5:27 pm

THANKS AGAIN Mahalo !! keep up the good work Small Cox Logo getback Small Cox Logo

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Re: Tee Bee build

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