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Cox Engine of The Month
September-2017
Kim's

"Cox Conquest gets a Run-Up."



PAST WINNERS
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*Cox Engine of The Month* Submit your pictures! -May 2017-

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*Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Admin on Tue May 02, 2017 3:55 am

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
   


     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!



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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Kim on Tue May 02, 2017 5:37 am

My Swap Meet Medallion .09 RC runs up after a cleaning.

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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  NEW222 on Tue May 02, 2017 6:52 am

A homely Bee.. A good little runner.
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Silver Pee Wee .020 on Top Flite Silver Streak

Post  badbill on Tue May 02, 2017 7:32 am

My favorite Cox engine, the venerable Pee Wee .020 on a plane that means a lot to me as well Small Cox Logo Not sure what year this kit was made, But I know I had one in either 1968 or 1969. Flew the wings off of it on very short lines, in the cul de sac we lived on. Once, I started the motor with my brother on the handle and let it go. Almost immediately after standing up, the plane center punched me in the back, knocking me flat on my face! I was lucky to find this awesome example of plane and engine, enjoy!

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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  OVERLORD on Tue May 02, 2017 10:33 am

Pee Wee .020

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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  MauricioB on Tue May 02, 2017 12:47 pm




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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Marleysky on Tue May 02, 2017 1:55 pm


This is a Sportsman from a crashed Comanche


Last edited by Marleysky on Tue May 02, 2017 8:39 pm; edited 1 time in total
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Davenz13 on Tue May 02, 2017 4:18 pm

I'll throw one in the mix. Valentine Cox DR Special
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  fit90 on Tue May 02, 2017 5:19 pm

Pretty engine. Is it a disc or reed induction?
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Davenz13 on Tue May 02, 2017 6:26 pm

It's disc, It's official name is rather long winded. Valentine Cox Speed Racer Drum Valve RR1 Special
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  fit90 on Tue May 02, 2017 7:50 pm

What is the difference between disc and drum valve? I have several of his disc valve engines.
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  706jim on Tue May 02, 2017 8:54 pm

Disc is like a flat plate with an opening in the face.

Drum is like a cylinder (or drum) with an opening in the side.
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  fit90 on Tue May 02, 2017 9:24 pm

Thank you
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Davenz13 on Tue May 02, 2017 9:38 pm

Oh man I had a feeling you’d ask that.
Strictly speaking I wasn’t exactly right saying disc although that’s the closest definition between your question disc or reed.
Loosely speaking a disc valve can be any circular part of a device that shuts, opens or moderates flow. These can do this by moving edgeways across the flow or rotating through their axis. They can also do it in a manner very similar to a reed valve, for example a crankcase venting valve, negative crankcase pressure, disc valve sucked shut, positive crankcase pressure disc valve pushed open. You see the similarity here. If a reed valve was a circular shape you could call it a disc valve. A disc valve although it may move around a bit does not need to rotate to perform its function
A rotary valve is exactly that. It’s a disc with a hole or opening away from its central axis. When the disc rotates the opening in the disc lines up with a corresponding opening allowing the flow to take place then shuts it off as the disc rotates on. These have to rotate to work. This type can also be called a drum valve although I tend to think of drum valves as being more tubular.
This is the type of valve in this engine
There’s bound to be someone on here can explain it better than I have. I’m sure I’ve got a spare RR1 rotary valve somewhere. I’d post a picture of it for you but at the moment I can’t find it.
This reminds me of a Kawasaki I was riding that suddenly and explicably stopped as though the key had been turned off. Later examination found that the big-end brass thrust washer had broken and as murphy’s law would have it the remains were passing through the disc valve opening but hadn’t quite made it all the way through when the opening closed. The outer part of the disc was fibre and when the piece of washer jammed itself in there the fibre disc promptly stopped and sheared itself off from its drive collar and that was the end of that.
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  balogh on Wed May 03, 2017 3:35 am

Born around the same time as its happy owner...neither of them a young stallion, though, anymore

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My Space Bug Jr. collection almost complete

Post  getback on Wed May 03, 2017 9:34 am

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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  balogh on Wed May 03, 2017 9:38 am

getback wrote:

Hey Eric, why "almost" complete? I think the disassembled one has all the components needed... Very Happy
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  getback on Wed May 03, 2017 11:46 am

Old pic there together now , my display is not unfortunately the glasses for my display (shelving) got broken all but one Sad Small Cox Logo
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  KariFS on Wed May 03, 2017 11:46 am


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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Mark Boesen on Wed May 03, 2017 11:27 pm

10?
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  KariFS on Thu May 04, 2017 2:15 am

Mark Boesen wrote:10?

Hey Mark, if you wanted to submit a pic, I wouldn't mind withdrawing mine. I thought I'll take a break this month but then just submitted one so that we'll get the poll going Smile
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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Admin on Thu May 04, 2017 2:20 am

Yep, looks like we have 10.

I'll get to poll set up later today.

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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

Post  Mark Boesen on Thu May 04, 2017 10:34 am

KariFS wrote:
Mark Boesen wrote:10?

Hey Mark, if you wanted to submit a pic, I wouldn't mind withdrawing mine. I thought I'll take a break this month but then just submitted one so that we'll get the poll going Smile

no, but thanks anyway, i was just stating it looks like 10 :^ )..

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Re: *Cox Engine of The Month* Submit your pictures! -May 2017-

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