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My Cox twin collection
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My Cox twin collection
Figured I'd take a pic of my Cox twin collection. Just added the TeePee .040 this week. The back 2 engines I have run. The others I have not run yet. Probably won't run the .040 since it looks unrun.
There was one other twin but it's a non running eBay mistake.
There was one other twin but it's a non running eBay mistake.
Jason_WI- Top Poster
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Posts : 3123
Join date : 2011-10-09
Age : 48
Location : Neenah, WI
Re: My Cox twin collection
I followed that listing, when I saw it I thought of you Nice engine, looks well done and it had a box too?
crankbndr- Top Poster
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Location : Homestead FL
Re: My Cox twin collection
Yes it had the box and instructions too. The bottom of the box was lined with a piece of newspaper dated from May 1968. So I assume it was made the latter half of '68 based on this.
Last edited by Jason_WI on Tue Oct 27, 2015 8:02 pm; edited 1 time in total
Jason_WI- Top Poster
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Jewel
These engines are very beautiful, congratulations
Alejo
Alejo
garza2014- Bronze Member
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Age : 42
Location : Medellin, Colombia
Re: My Cox twin collection
Very very cool. I would love to see video of one of them running.
Jim
Jim
JPvelo- Diamond Member
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Join date : 2011-12-02
Age : 56
Location : Colorado
Re: My Cox twin collection
JPvelo wrote:Very very cool. I would love to see video of one of them running.
Jim
here is the twin golden bee running.
Jason_WI- Top Poster
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Posts : 3123
Join date : 2011-10-09
Age : 48
Location : Neenah, WI
Re: My Cox twin collection
Hi, can you add your twins to your photo gallery?
Thanks
coxaddict
Thanks
coxaddict
coxaddict- Gold Member
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Join date : 2013-01-27
Location : north shore oahu, Hawaii
Re: My Cox twin collection
Nice Jason, thanks for sharing, I love this stuff. Collections are educational and fun to do. I just added blue and yellow tanked SBJ's to mine.
Bob
Bob
rsv1cox- Top Poster
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Posts : 10620
Join date : 2014-08-18
Location : West Virginia
Re: My Cox twin collection
NICE Collection Jason !! I new you had some twins but had no idea you were that deep into it , good stuff , That's a beautiful engine and very nice with paper work and box , I was also watching it had no idea it was from 1968 that's cool ! Do you know if the company or gentleman is still with us ? Eric
getback- Top Poster
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Re: My Cox twin collection
Jason_WI wrote:JPvelo wrote:Very very cool. I would love to see video of one of them running.
Jim
here is the twin golden bee running.
Just curious. What fuel are you using? What prop? Do you leave the batteries attached while running? Do they both start together? What happens if one just windmills? I would think that they would both have to start together because of the gearing. Is there a practical application for model use, or are they just bench run only? I would think that bulk and weight would offset any power gain.
They don't sound like the two Golden Bees on my P-38 when they sync together, perhaps that's because they are mechanically attached.
Bob
rsv1cox- Top Poster
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Posts : 10620
Join date : 2014-08-18
Location : West Virginia
Re: My Cox twin collection
Two .049 make less power than a typical .10 and are considerably heavier, but not nearly as cool!!!! Nice collection!
It seemed like these were really popular early 70's thru the 80's, i remember seeing ads in model airplane mags a lot, also geared .60's were big at this time, the dawn of 1/4 scale.
It seemed like these were really popular early 70's thru the 80's, i remember seeing ads in model airplane mags a lot, also geared .60's were big at this time, the dawn of 1/4 scale.
Re: My Cox twin collection
Jason_WI wrote:JPvelo wrote:Very very cool. I would love to see video of one of them running.
Jim
here is the twin golden bee running.
That second engine sure becomes a liability once it cuts out. What concerned me was that the remaining runner just got slower & slower. All I can think was that the one that cut out was running with no lube and started to tighten up. I'd be curious to know what the engine speed is with the 12,000 rpm prop speed, or is the gearing 1:1?
Oldenginerod- Top Poster
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Location : Drouin, Victoria
Re: My Cox twin collection
rsv1cox wrote:
Just curious. What fuel are you using? What prop? Do you leave the batteries attached while running? Do they both start together? What happens if one just windmills? I would think that they would both have to start together because of the gearing. Is there a practical application for model use, or are they just bench run only? I would think that bulk and weight would offset any power gain.
They don't sound like the two Golden Bees on my P-38 when they sync together, perhaps that's because they are mechanically attached.
Bob
Using a MA 7x4 prop and Sig Champion 25%. Its in the comments for the vid if you view it at the youtube site. Not sure why I left the glow plug clips on. It does run once they are removed.
The gearing is not 1:1. It does have reduction. The engines are timed so they fire at the same time so you dont get the harmonics like a normal twin plane with 2 seperate engines.
This would look good in a small cub.
Jason_WI- Top Poster
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Re: My Cox twin collection
They look to run very smoothly. Are those GB's stock?
Cribbs74- Moderator
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Re: My Cox twin collection
Cribbs74 wrote:They look to run very smoothly. Are those GB's stock?
Yes. In fact when I got it it had a very early pinkish hue GB on it with the 3 piece piston. I removed that engine and replaced with a later version.
Jason_WI- Top Poster
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Re: My Cox twin collection
Nice TeePee Jason. The seller (gatafish) sells lots of nice engines. I wonder if he's a long time hoarder cashing in on his retirement fund or does he spend a lot of time going to swap meets?
jsesere- Rest In Peace
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Location : Salem Oregon
what gearing do they have?
what gearing do they have?
cox24711- Platinum Member
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Age : 21
Location : Noosa Queensland Australia
Another Cox Twin Engine on a Prop Rod
Jason_WI wrote:Figured I'd take a pic of my Cox twin collection. Just added the TeePee .040 this week. The back 2 engines I have run. The others I have not run yet. Probably won't run the .040 since it looks unrun.
There was one other twin but it's a non running eBay mistake.
Jason: You might be interested in adding this "Cox Twin". , to your collection. And get a free space bug jr..
link:http://www.ebay.com/itm/COX-PRO-ROD-VINTAGE-MINT-TWIN-CYLINDER-AND-ORIGINAL-ENGINE-/371548464953?hash=item568203a739:g:S4IAAOSwFMZWtSzX
looks like the real thing doesn't it? NOT
space bug jr. included free
p.s. all this for only $375 + $17.39 shipping
happydad
happydad- Rest In Peace
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Re: My Cox twin collection
if i would make a geared twin are there any other gears that I could use?
cox24711- Platinum Member
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Location : Noosa Queensland Australia
Re: My Cox twin collection
cox24711 wrote:if i would make a geared twin are there any other gears that I could use?
https://www.coxengineforum.com/t1623-cox-geared-twins
There are some links in this thread to a rather complete looking set of instructions. It is tempting to try. I am sure there are "local" supply houses* that carry gears that are suitable anywhere in the world.
Phil
*I count mail/internet order from the same country as "local" for this purpose.
pkrankow- Top Poster
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Join date : 2012-10-02
Location : Ohio
here is another one! V-twin BTO
Well it's been a while since we have seen any "new" cox twins. This one is new to me. Build it to order 2 weeks ARO.
link:
http://www.ebay.com/itm/Cox-049-Based-V-Twin-049-Radial-Engine-Motor-Cox-V-Twin-Prototype-COOL-/291698662068?hash=item43ea985ab4:g:Fa4AAOSw~OVWxIvS
Cox V-twin on ebay $200 for a build to order
see u-tube video
link: https://www.youtube.com/watch?v=NRoTPDdFMHw&feature=youtu.be
happydad
link:
http://www.ebay.com/itm/Cox-049-Based-V-Twin-049-Radial-Engine-Motor-Cox-V-Twin-Prototype-COOL-/291698662068?hash=item43ea985ab4:g:Fa4AAOSw~OVWxIvS
Cox V-twin on ebay $200 for a build to order
see u-tube video
link: https://www.youtube.com/watch?v=NRoTPDdFMHw&feature=youtu.be
happydad
happydad- Rest In Peace
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Join date : 2012-05-28
Age : 78
Location : Escondido, CA
Re: My Cox twin collection
happydad wrote:Well it's been a while since we have seen any "new" cox twins. This one is new to me. Build it to order 2 weeks ARO.
link:
http://www.ebay.com/itm/Cox-049-Based-V-Twin-049-Radial-Engine-Motor-Cox-V-Twin-Prototype-COOL-/291698662068?hash=item43ea985ab4:g:Fa4AAOSw~OVWxIvS
Cox V-twin on ebay $200 for a build to order
see u-tube video
link: https://www.youtube.com/watch?v=NRoTPDdFMHw&feature=youtu.be
happydad
After stating "Both cylinders run" it's a little odd that he then states "This engine is sold "as is" for display purposes only."
Oldenginerod- Top Poster
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Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria
Re: My Cox twin collection
Having the intake in the rear the front cylinder starves, the lions share of fuel going to the rear cylinder.
The front cylinder will act like a slave. The lag will wear out parts faster.
The front cylinder will act like a slave. The lag will wear out parts faster.
1/2A Nut- Top Poster
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