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by davidll1984 Today at 7:56 am

» Another of C.T. engines cleaned ---- Cox Tee Dee .09 --- Just today (3/26/2024) more Cox parts
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Cox Engine of The Month
March-2024
balogh's

"COX Budapest" .049 engine



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Post  mitchg95 Fri Apr 06, 2012 1:02 pm

hey, i always love seeing your guys engines on this site. I am getting a medallion .09 from IvanHoe end would like to see if someone can post a pic of all the medallion's sitting next to each other ie: .049, .09, and .15 thanks
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Post  Surfer_kris Fri Apr 06, 2012 1:32 pm

I'll see what I can do regarding medallions, here is another nice little line-up to look at in the meantime;

pics of medallions Img_1315
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Post  mitchg95 Fri Apr 06, 2012 1:38 pm

thanks for the pic
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Post  Surfer_kris Fri Apr 06, 2012 2:24 pm

I couldn't find any .049 medallion in my stuff, but the here is the .09 and .15 next to a TD .051 engine;

pics of medallions Img_1630


Last edited by Surfer_kris on Fri Apr 06, 2012 2:31 pm; edited 1 time in total
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Post  mitchg95 Fri Apr 06, 2012 2:25 pm

Surfer_kris wrote:I could find any .049 medallion in my stuff, but the here is the .09 and .15 next to a TD .051 engine;

pics of medallions Img_1630

dang that .09 and .15 is huge, i cant wait to get my .09 in the mail
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Post  FIXR7 Fri Apr 06, 2012 10:26 pm

TD.09 vs Medallion .049

pics of medallions DSC05247

pics of medallions DSC05246

pics of medallions DSC05245

pics of medallions DSC05244
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Post  mitchg95 Fri Apr 06, 2012 10:28 pm

FIXR7 wrote:TD.09 vs Medallion .049

pics of medallions DSC05247

pics of medallions DSC05246

pics of medallions DSC05245

pics of medallions DSC05244

my god man!!! thats huge, i cant wait for mine to arrive from ivanhoe in ireland bounce now to get a medallion or td 15...
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Post  Cribbs74 Fri Apr 06, 2012 11:35 pm

I told ya Mitch! About twice the size! And about twice the noise too. Very Happy
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Post  mitchg95 Fri Apr 06, 2012 11:38 pm

cribbs74 wrote:I told ya Mitch! About twice the size! And about twice the noise too. Very Happy


sweet, my neighbors will LOVE ME!!!! lol!
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Post  Surfer_kris Sat Apr 07, 2012 3:34 am

There are/were RC conversion kits offered for the medallions, these came in a complete complete do-it-yourself kit with muffler, rotating spraybar and linkage. The muffler makes them a little more quiet, but mainly at reduced throttle. You can also use the head from a QB to get a regular glow plug, with lower power and idle.

pics of medallions Img_1631
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Post  GermanBeez Sat Apr 07, 2012 4:06 am

why does everyone castrate their TD09s like that?
sure, they are loud, but doing that to a TD, that's just unethical... Sad
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Post  Surfer_kris Sat Apr 07, 2012 4:10 am

The TD 09 came in RC versions from the factory. It doesn't really reduce the power that much as the muffler is not very restrictive and the full throttle performance is close to the regular TD 09. The same is true for the TD .05RC.

The only really odd thing I've seen is intake chokes on sure-starts....
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Post  Ivanhoe Sat Apr 07, 2012 5:04 am

mitchg95 wrote:
cribbs74 wrote:I told ya Mitch! About twice the size! And about twice the noise too. Very Happy


sweet, my neighbors will LOVE ME!!!! lol!

I have a NIP .09 muffler I'd be willing to trade!
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Post  GermanBeez Sat Apr 07, 2012 7:33 am

meh...mufflers, shmufflers Smile
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Post  Surfer_kris Sat Apr 07, 2012 8:22 am

The advantage of mufflers is not only the sound but also the fact that they redirect the exhaust output. With a little care the only thing that sees oil is one side of the elevator. Below is an after-flight image with the 05RC, now compare that to the front end you'll usually get from a cox engine and you might see what I'm after...

pics of medallions Img_1316
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Post  nitroairplane Sat Apr 07, 2012 9:34 am

Kris I really like that plane.
Who was the company that makes a kit for it again? I would love to build one some day and do have a couple of norvels not doing anything.
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Post  Surfer_kris Sat Apr 07, 2012 1:07 pm

It is a Yellow Jacket from Morris Hobbies. The kit had very few ready-cut parts (die-cut fuselage and tail surfaces only) so one could easily build it straight from the drawing. The drawing should still be available but I cannot find the link right now.

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Post  Surfer_kris Sat Apr 07, 2012 1:15 pm

Found the drawing now in the air age store; Yellow Jacket drawing
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Post  mitchg95 Sat Apr 07, 2012 1:20 pm

Ivanhoe wrote:
mitchg95 wrote:
cribbs74 wrote:I told ya Mitch! About twice the size! And about twice the noise too. Very Happy


sweet, my neighbors will LOVE ME!!!! lol!

I have a NIP .09 muffler I'd be willing to trade!

cool what would you like?
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Post  Surfer_kris Sat Apr 07, 2012 1:23 pm

If you do built it I made a few changes that might interest you;

i) I reduced the tail surfaces as they looked a bit large to me.
ii) reduced wing incidence. The drawing calls for about 2°, but that makes it balloon with speed, about 0.8° is enough and 0° may work too.
iii) I added about 2-3° degrees engine downthrust (the drawing called for 0°) to counteract the ballooning at speed.

With these changes I can fly it at full throttle with a Norvel .061 (spinning a 5x4 at about 20500rpm) with only a very little climb and it makes for some great large loops and long sweeping turns (no rudder needed). Great fun but it gets small very quickly, don't blink!
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Post  FIXR7 Sat Apr 07, 2012 7:50 pm

Surfer_kris wrote:The TD 09 came in RC versions from the factory. It doesn't really reduce the power that much as the muffler is not very restrictive and the full throttle performance is close to the regular TD 09. The same is true for the TD .05RC.

The only really odd thing I've seen is intake chokes on sure-starts....

Yep, the pics I showed are untouched factory engines...The TD .09 in fact, has never been started.
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