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Cox Engine of The Month
March-2024
balogh's

"COX Budapest" .049 engine



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Post  Ivanhoe Wed Apr 18, 2012 6:35 am

Just added an OK Cub .14 to my list, thanks to Mitch for the trade. I think the engine is little run, it's very clean and I had to fiddle with the NV quite a bit to first get it started.
Now that it's had a bit of running it's starting very easily and runs very well indeed.

Latest Cub! Cub_1415

Very nice sport engine, haven't decided what to fly it in yet.

I now have Cubs in .049A, .049B, .074 .099 and .14, but you could collect Cub variants for ever! One day I may get some of the other sizes, .024, .19, .29, and .35 but these tend to fetch BIG money, so it won't be anytime soon!


Last edited by Ivanhoe on Wed Apr 18, 2012 6:43 am; edited 1 time in total
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Post  nitroairplane Wed Apr 18, 2012 6:43 am

No .024 in your sights?
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Post  Ivanhoe Wed Apr 18, 2012 6:44 am

nitroairplane wrote:No .024 in your sights?

Just realised I'd forgotten that one, so I added it!
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Post  nitroairplane Wed Apr 18, 2012 6:51 am

Ivanhoe wrote:
nitroairplane wrote:No .024 in your sights?

Just realised I'd forgotten that one, so I added it!
How interested in one are you?
I know a place.
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Post  microflitedude Wed Apr 18, 2012 7:20 am

Looks like you needle is all the way in?
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Post  Ivanhoe Wed Apr 18, 2012 7:57 am

nitroairplane wrote:
Ivanhoe wrote:
nitroairplane wrote:No .024 in your sights?

Just realised I'd forgotten that one, so I added it!
How interested in one are you?
I know a place.

Unfortunately not at the moment, unimportant things like holidays causing lack of modelling cash!
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Post  Ivanhoe Wed Apr 18, 2012 7:59 am

Ivanhoe wrote:
nitroairplane wrote:No .024 in your sights?

Just realised I'd forgotten that one, so I added it!

Forgot the diesels as well, like I say, you can collect Cubs for ever!
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Post  Ivanhoe Wed Apr 18, 2012 8:00 am

microflitedude wrote:Looks like you needle is all the way in?

Cub needles are a pain in the butt, it's open about 21/2 turns, slightest touch goes from too rich to too lean!
It's running just on 10,000 rpm on an 8 x 6 and straight fuel in the picture, they aint racing engines!
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Post  microflitedude Wed Apr 18, 2012 8:39 am

Ivanhoe wrote:
microflitedude wrote:Looks like you needle is all the way in?

Cub needles are a pain in the butt, it's open about 21/2 turns, slightest touch goes from too rich to too lean!
It's running just on 10,000 rpm on an 8 x 6 and straight fuel in the picture, they aint racing engines!

Maybe you could try a silicone tubing seal.
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Post  mitchg95 Wed Apr 18, 2012 8:57 am

glad you like the OK Cub motor Wilf, im liking that medallion .09 that i got from you in the trade we did. It is my first larger cox engine, all up to now have been .020's ND .049's
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Post  Ivanhoe Wed Apr 18, 2012 8:58 am

microflitedude wrote:
Ivanhoe wrote:
microflitedude wrote:Looks like you needle is all the way in?

Cub needles are a pain in the butt, it's open about 21/2 turns, slightest touch goes from too rich to too lean!
It's running just on 10,000 rpm on an 8 x 6 and straight fuel in the picture, they aint racing engines!

Maybe you could try a silicone tubing seal.

No, the problem is the actual design of the Cub NVA, the needle itself is very short, and has hardly any taper to it, consequently the needle is hyper-sensitive, it's not so bad in the larger engines (.099 / .14 etc) but it makes the little .049s absolute b****ds to start and keep running. Texas Timers do a replacement NVA which is much better, having a proper needle and a finer thread, however, buying those and paying the shipping over here makes them an expensive fix! I have a couple of Cubs which I've fitted with them and they are much better.
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Post  Ivanhoe Wed Apr 18, 2012 9:00 am

mitchg95 wrote:glad you like the OK Cub motor Wilf, im liking that medallion .09 that i got from you in the trade we did. It is my first larger cox engine, all up to now have been .020's ND .049's

Have you had the Medallion running yet? when you do, post pics
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Post  mitchg95 Wed Apr 18, 2012 9:03 am

Ivanhoe wrote:
mitchg95 wrote:glad you like the OK Cub motor Wilf, im liking that medallion .09 that i got from you in the trade we did. It is my first larger cox engine, all up to now have been .020's ND .049's

Have you had the Medallion running yet? when you do, post pics

i have not had the medallion running yet, im waiting for the .09 muffler to arrive in the mail Very Happy
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Post  GermanBeez Wed Apr 18, 2012 9:11 am

i always have an excuse for not running my 09, i'm pretty scared of it, actually...i have a lot of respect for very sharp
things rotating at high speeds powered by very strong engines Paranoid
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Post  mitchg95 Wed Apr 18, 2012 9:14 am

GermanBeez wrote:i always have an excuse for not running my 09, i'm pretty scared of it, actually...i have a lot of respect for very sharp
things rotating at high speeds powered by very strong engines Paranoid

yeah same here, just wait till you get into the bigger 40 size motors and up Paranoid
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Post  mitchg95 Wed Apr 18, 2012 9:17 am

[quote="Ivanhoe"] Latest Cub! Cub_1415


i was just starring at the picture, look at were the piston is in the pic. BDC perfect timing lol! you must have a really good camera
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Post  microflitedude Wed Apr 18, 2012 10:02 am

That is odd, as it wasn't fast enough to stop the prop.

Does the piston move slower than the prop? Huh...
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Post  mitchg95 Wed Apr 18, 2012 10:05 am

microflitedude wrote:That is odd, as it wasn't fast enough to stop the prop.

Does the piston move slower than the prop? Huh...

it must be moving slower than the prop, but then again the motor is not geared?
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Post  Ivanhoe Wed Apr 18, 2012 11:07 am

microflitedude wrote:That is odd, as it wasn't fast enough to stop the prop.

Does the piston move slower than the prop? Huh...

I think that the answer is that the piston is moving so fast across a small distance (the exhaust port) that it does not register on the camera, only the light coming from the other side (between piston strokes) registers.
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Post  mitchg95 Wed Apr 18, 2012 11:08 am

Ivanhoe wrote:
microflitedude wrote:That is odd, as it wasn't fast enough to stop the prop.

Does the piston move slower than the prop? Huh...

I think that the answer is that the piston is moving so fast across a small distance (the exhaust port) that it does not register on the camera, only the light coming from the other side (between piston strokes) registers.

that makes the most sense

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