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» Contest - Contest - Contest
by NEW222 Today at 9:27 am

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by sosam117 Today at 8:30 am

» Home made fuel nipple for COX Tee Dee RC carb
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» Designing a Tee Dee RC carb
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by MauricioB Sat Oct 16, 2021 12:09 am

Cox Engine of The Month
October-2021
MauricioB's

"Babe Bee .049 r/c"



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Post  Admin Sun Aug 02, 2020 10:32 pm

August already! Where is the summer going? Huh...

submit the next
COX ENGINE of the MONTH!
and have a chance to win a Black Lynx .049 Engine from Ex Model Engines!
CLICK HERE FOR MORE INFO
*Cox Engine of The Month* Submit your pictures! -August 2020- Lynxbi12


Rules: You may post *one (1) picture of an engine or a group of engines that are alike (for example: a collection of Space Bug Jr.s that feature each color tank). The engine must be a Cox engine, it can be stock or parts built. Cox engines using aftermarket or handmade parts and multi-cylinder engines are allowed as long as they feature Cox made crankcase(s) and cylinder(s). Although proof isn't required, engines that are built using aftermarket or handmade parts have to be able to run. A good example of a non-running homemade engine that wouldn't qualify for this contest is found HERE. Disassembled engines are allowed as long as all parts are visible and the engine is in running condition when assembled.

If you are unsure if your picture qualifies, feel free to contact the administrator with questions.

* You may post multiple "pictures" as long as they are all joined together in one picture. (This is done in image editing software before uploading)

MAIN POINTS
•One picture
•Picture shall be of one engine or engines that are alike (a Babe Bee and a Tee Dee .049 together would NOT qualify)
•Must be a Cox Engine
•Engines using aftermarket or handmade parts must feature Cox made crankcase(s) and cylinder(s)
•Engine must be able to run

Optional Caption
Along with your picture you may include a caption that describes or explains the picture. The caption should include the name and displacement of the engine. The caption has to be short as if you picture wins, it will be posted under the picture in the sidebar. If you do not include a caption, one will be thought up for you.


After 5 days, the first 10 pictures will be moved to another topic to be voted on by other members. The winner will have their engine displayed on the sidebar of the forum and forever listed on the past winners page.

Looking forward to see what you guys come up with! Good Luck!


Small Cox Logo BE SURE TO READ THE RULES

*Cox Engine of The Month* Submit your pictures! -August 2020- Sponso11

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Post  Kim Sun Aug 02, 2020 11:06 pm

A Cox RR-1 spins the "Traveling Propeller" high above Cape Girardeau, Missouri

*Cox Engine of The Month* Submit your pictures! -August 2020- 11_37
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Post  1/2A Nut Sun Aug 02, 2020 11:27 pm

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Post  fredvon4 Mon Aug 03, 2020 7:25 am

*Cox Engine of The Month* Submit your pictures! -August 2020- 20170424
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Post  sosam117 Mon Aug 03, 2020 8:13 am

Refurbished Cox R/C Commander With Baby Bee (Mfg. in June 1993 -- stamped on box)
with Cox Cobra 3 channel radio on channel 46 (Mfg. Aug. 1993 -- with FCC Gold Stamp on Tx)
*Cox Engine of The Month* Submit your pictures! -August 2020- Cox_rc10
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Post  balogh Mon Aug 03, 2020 8:39 am

Even the smallest COX, the TeeDee 010 can do a selfie vid in the air!


*Cox Engine of The Month* Submit your pictures! -August 2020- Roarin12

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Post  Mike1484 Mon Aug 03, 2020 9:01 am

Golden Bee Sportster

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Post  getback Mon Aug 03, 2020 10:56 am

DOPED UP COX ENGINE     *Cox Engine of The Month* Submit your pictures! -August 2020- Pepper10
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Post  Tee Bee Mon Aug 03, 2020 11:32 am

Representing the Cox Engine Forum during a test session at the club field.

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Post  NEW222 Mon Aug 03, 2020 6:20 pm

Black Widow Combat Ship
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Post  Basswood Mon Aug 03, 2020 7:29 pm

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Post  Basswood Mon Aug 03, 2020 8:15 pm

@balogh wrote: How is that 3way fitting work to boost tank pressure then allow flow to the carb through the same single fuel line?


Balogh
to tell you the truth I don't know how it works? It's a sealed unit. its called a 1/2A super pumper. it comes in different sizes and is factory calibrated.The engine is all new and I have not test run it yet.
I have blown through it and it does not allow flow back to the tank or pressure nipple. it is one direction only toward the carb.

Bob
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Post  Levent Suberk Tue Aug 04, 2020 6:19 am

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Post  sosam117 Tue Aug 04, 2020 7:04 am

@Basswood wrote:
@balogh wrote: How is that 3way fitting work to boost tank pressure then allow flow to the carb through the same single fuel line?


Balogh
to tell you the truth I don't know how it works? It's a sealed unit. its called a 1/2A super pumper. it comes in different sizes and is factory calibrated.The engine is all new and I have not test run it yet.
I have blown through it and it does not allow flow back to the tank or pressure nipple. it is one direction only toward the carb.

Bob

I think it has the check valve before the crank case pressure.
So, this how I think it works.
You use pressure from the muffler to pressurize the fuel tank and pushes it to the needle valve.
The crank case pressurizes the fuel from the crank case,
but with the check valve before the crank case pressure it can't back feed the fuel back to the tank.

It's similar to my plumbing system with a toilet and a sump pump.
Flush the toilet water goes down to the basement but,
with the check valve at the sump pump that water doesn't go into the sump pump well.
So, If the sump pump turns on, that water along with the toilet water both get injected to the holding tank outside.

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Post  Basswood Tue Aug 04, 2020 9:41 am

@sosam117 wrote:
@Basswood wrote:
@balogh wrote: How is that 3way fitting work to boost tank pressure then allow flow to the carb through the same single fuel line?


Balogh
to tell you the truth I don't know how it works? It's a sealed unit. its called a 1/2A super pumper. it comes in different sizes and is factory calibrated.The engine is all new and I have not test run it yet.
I have blown through it and it does not allow flow back to the tank or pressure nipple. it is one direction only toward the carb.

Bob

I think it has the check valve before the crank case pressure.
So, this how I think it works.
You use pressure from the muffler to pressurize the fuel tank and pushes it to the needle valve.
The crank case pressurizes the fuel from the crank case,
but with the check valve before the crank case pressure it can't back feed the fuel back to the tank.

It's similar to my plumbing system with a toilet and a sump pump.
Flush the toilet water goes down to the basement but,
with the check valve at the sump pump that water doesn't go into the sump pump well.
So, If the sump pump turns on, that water along with the toilet water both get injected to the holding tank outside.

sosam117

sosam117
You may be correct.
The first thing I thought of is, ball check valve. so I shook it. nothing no rattle?
maybe it has a light spring in it to keep it in check?
here are the instructions. may give more info on it.
Bob

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Post  balogh Tue Aug 04, 2020 9:51 am

I have read on RC forum that it is in fact a diaphragm which pulls fuel in the fuel line from the tank when the crankcase is under vacuum, and - probably - does not reverse when the crankcase is pressurized, so it pulls the fuel from the tank but a check valve inside does not allow it to pull fuel from the direction of the carb...RC forum says the product was not as successful as originally anticipated so it dropped from the product line of Robart Manufacturing (??)
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Post  MauricioB Tue Aug 04, 2020 11:10 am

@balogh wrote:I have read on RC forum that it is in fact a diaphragm which pulls fuel in the fuel line from the tank when the crankcase is under vacuum, and - probably - does not reverse when the crankcase is pressurized, so it pulls the fuel from the tank but a check valve inside does not allow it to pull fuel from the direction of the carb...RC forum says the product was not as successful as originally anticipated  so it dropped from the product line of Robart Manufacturing (??)

Well, it would be good to see that motor running with that accessory and thus draw conclusions.
I have seen many accessories that were not positive and others worked very well. I have used the Perry pump on an OS .91 FX, with excellent results .... but it exists of everything and with different results!
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Post  Basswood Wed Aug 05, 2020 12:07 am

MauricioB
I think I'm going to give the super pumper a whirl on my new 051. I like the short fuel lines over the muffler/fuel tank types and we'll see how it goes. I like the fact you can control the fuel volume/pressure by just turning the knurled side nipple in or out.


Brad I luv your engine with the custom carb body.just wondering is that an  O.S. #14 fuel nipple your using on the carb? also can we get those aluminum engine mounts? or are they custom also.

Bob
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Post  1/2A Nut Wed Aug 05, 2020 1:16 am

Hi thank you Bob the fuel nipple is from a small car engine RC carb.
The aluminum beam mounts are from Larry Driskill

KT10 Motor Mounts:

http://kittingittogether.com/accessories/kt10-motor-mounts/

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Post  Admin Wed Aug 05, 2020 1:36 am

@fredvon4 wrote:*Cox Engine of The Month* Submit your pictures! -August 2020- 20170424

Are those all TD .051s?

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Post  Basswood Wed Aug 05, 2020 4:31 am

@Admin wrote:
@fredvon4 wrote:*Cox Engine of The Month* Submit your pictures! -August 2020- 20170424

Are those all TD .051s?
I agree Jacob. very nice engines, custom heads, carbs, and my favorite great anodizing too. but what I'm really wondering about is that crankshaft in the middle of the photo? custom grind T.D blown rod ?
Bob
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Post  balogh Thu Aug 06, 2020 2:35 pm

Bump
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Post  robot797 Thu Aug 06, 2020 2:58 pm

how many pictures are needed?
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Post  balogh Thu Aug 06, 2020 3:06 pm

I think we have the 10.
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Post  Admin Thu Aug 06, 2020 8:25 pm

We do have 10, was waiting on Fred to answer my question... but maybe I'll let him slide this month.

I'll get the poll setup shortly.

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