What model cox is this? - RC Groups
Thread Tools
Jun 19, 2012, 09:15 AM
The Tree? Yea I can hit that!

What model cox is this?

This seems to be a common question, and I am sorry, butI can seem to be sure what model cox engine this is and how much it is worth. Any help would be great.
Sign up now
to remove ads between posts
Jun 19, 2012, 09:49 AM
Registered User
RknRusty's Avatar
Possibly a combination of parts, all of which are readily available. The cylinder may have a number stamped on either the side near the bottom, or on the small face in the corner of an exhaust port. You may need a magnifying glass. If it's a "1" then you have a Black Widow cylinder and you should see a gap under the piston when you turn it to top dead center. If a 5/64" drill bit fits easily through the venturi inlet in the tank bowl and backplate, and it has a #1 cylinder, you essentially have a Black Widow that's not Black anodized. How it got that way will likely remain a mystery.

If either of the cases I described is different, post back with what you have and we can try to narrow it down.
Jun 19, 2012, 10:09 AM
I was going to quickly answer your question cox 049, and then thought I would do a little research before I said something thoughtless.

I never realized before how many different names cox gave the 049 based on tank shape, size and colour and the same can be said for the throttle, cylinder head, needle valve and base.

Here in Canada new 049ís go for 25 to 50 dollars based on tank and throttle.

Here is a link for a very expense store in Canada that has Cox in stock. On the left in the little search bar, just type in cox, hit enter. The results will turn up several different models and parts. I did not see a cox matching exactly, but there is one very similar to yours.

Jun 19, 2012, 04:19 PM
Registered User
RknRusty's Avatar
Here's where a lot of Cox collectors hang out: http://www.coxengineforum.com/

Here are the best sources for Cox engines, parts, spec sheets and documents: http://coxengines.ca/
And: http://www.exmodelengines.com/home.php?cat=250
Jun 19, 2012, 09:28 PM
The Tree? Yea I can hit that!
I can see the 1 one the cylinder. That makes it a black widow?
Jun 20, 2012, 08:15 AM
Registered User
It is probably a BW -- a lot of engines were parted up when Estes was running the show. This engine has characteristics that put it in the transition period. It has the plastic backplate and ratchet starter, but a stunt tank and single slit exhaust. There were a number of BW's that shipped without anodizing on the tank or case.

The 1 on the single slit cylinder is indicative of an earlier BW, but the lack of anodizing, ratchet starter and plastic backplate place it later, so while it has the indicators, it does not fall into the design parameters of early engines. It will likely be a good runner, however.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Cox 049 what is this? mick1404 1/2A Planes 5 May 10, 2012 11:23 PM
Discussion What is best DF for "this model" ? Cr@sh Electric Ducted Fan Jet Talk 0 Mar 26, 2012 01:31 AM
Idea What model this plane is ? RcLento Foamies (Scratchbuilt) 4 Feb 26, 2012 09:53 AM
Question Anone Know what Glue COX/Nine Eagles use on their EPP Models? ShokWaveRider Scratchbuilt Indoor and Micro Models 1 Nov 25, 2011 10:06 PM
Question What effect on the characteristics of an airfoil does the position of the maximum thi RobZ Modeling Science 4 Sep 25, 2008 06:48 PM