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Cox Engine of The Month
November-2017
MauricioB's

"Cox Tee Dee .010"



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"With friends like this............I feel blessed!" My new engine.

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Happy "With friends like this............I feel blessed!" My new engine.

Post  duke.johnson on Tue Jul 14, 2015 10:06 pm

I went to a RC float fly this weekend and a good, no GREAT, friend gave me this engine.  It doesn't look to even been mounted.  It's a little out of my league, but I think its a .15 Sportsman. My son thinks its an .09, of course neither of us have held either one.


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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  TDbandit on Tue Jul 14, 2015 10:17 pm

Looks to me to be a Sportsman .15 nice find man I want one too! Very Happy (bandit)
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Post  NEW222 on Tue Jul 14, 2015 10:22 pm

Does he need anymore friends? Nice engine.
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Post  duke.johnson on Tue Jul 14, 2015 11:04 pm

He also owns a hobby shop.
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Post  Admin on Tue Jul 14, 2015 11:14 pm

Yep, Sportsman .15! Really nice collectors condition! Thumbs Up

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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  duke.johnson on Tue Jul 14, 2015 11:22 pm

Admin wrote:Yep, Sportsman .15! Really nice collectors condition! Thumbs Up
Collectors condition? Sad I've been think of a plane to build and fly it.
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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  Jason_WI on Tue Jul 14, 2015 11:39 pm

nice condition. The only thing missing is the spring starter. If it truly is new it be best to sell or trade for a runner. But that's the collector in me talking. Avoid electric starters on this engine. There isn't a thrust washer used between the case and drive plate.

If you do run it be sure to sign up for the CEF loaner 15 piston reset tool. You're going to eventually need it.
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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  1/2A Nut on Wed Jul 15, 2015 1:27 am

You can ebay source by watching for a spring starter to show up. Some came with aftermarket exhaust throttles if you want to go RC. Can source a TD .15 spinner nut for a elect. starter too.

Here is pic for reference
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Post  getback on Wed Jul 15, 2015 6:52 am

Nice !! , Duke if your not a collector then he probably intended on you to fly /run it ,, Nut were you get that lf. hand spring for yours ? 4th of July Flag Eric
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Post  1/2A Nut on Wed Jul 15, 2015 8:11 am

These springs show up on ebay from time to time as OEM parts I do deep searches looking for all Cox related products as some folks don't list in the right category. A spring this size is neat to operate lol first time I loaded that big prop up was a real treat and the second and third and so on. Small Cox Logo
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Post  balogh on Wed Jul 15, 2015 10:54 am

Jason_WI wrote:nice condition. The only thing missing is the spring starter.

....and my pocket around it...
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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  duke.johnson on Wed Jul 15, 2015 11:46 am

I'll have to find a starter spring for it.

Getback- your right, he didn't give it to me to look at.

I wonder what plane I should match it up with? My first thought would be the Sig Akromaster. Maybe a Flying Clown?
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Happy Parts

Post  Mike1484 on Wed Jul 15, 2015 9:23 pm

I might have some parts for that motor . I'll check and post back tomorrow .

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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  duke.johnson on Fri Jul 17, 2015 9:17 pm

Do you guys think the Sportsman would fly a Jr Ringmaster? I usually fly them on an OS 15FP.
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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  RknRusty on Fri Jul 17, 2015 10:20 pm

duke.johnson wrote:Do you guys think the Sportsman would fly a Jr Ringmaster?  I usually fly them on an OS 15FP.
I was hoping to learn something and be able to answer your question, but I'm still not sure. I started looking at mh-aerotools.de and then Sceptreflight.net, but can't find any good power ratings.

I did see one report on the slightly more powerful Olympic .15 claiming .287bhp@16,500 rpm. And .72bhp/ounce. I think both are pretty impressive engines. My guess is yes, it would pull the Ringmaster through loops and wingovers. The smaller but similar designed Space Hopper .049 is said to be nearly as powerful as an early Tee Dee .049, if that's any sort of clue. It's hard for me to believe the Sportsman can out-pull an OS .15fp though. The LA .15 has .410bhp@ 17,000 rpm.

That's all I've got. Not much help though.
Rusty


Last edited by RknRusty on Fri Jul 17, 2015 10:25 pm; edited 1 time in total

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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  1/2A Nut on Fri Jul 17, 2015 10:25 pm

http://www.sceptreflight.com/Model%20Engine%20Tests/Cox%20Olympic%20and%20Sportsman.html

Link will show it's power I have some Cox props made for the Sportsman they had them pitched for a CL plane.
Props are  6x6 for a CL Comanche
Year 1959:
8x4 at 13k
8x3 at 15k

Modern props at say 15% Nitro:
7x5 APC 14.6K (guess)
7x4 APC 15.8k
Olympic puts out an extra 500+ rpm in general as per the link.

Check out the weights: Shown with the Cox 6x6
7.4oz  vs 4.72oz (less without the throttle)


Last edited by 1/2A Nut on Fri Jul 17, 2015 11:01 pm; edited 8 times in total
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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  duke.johnson on Fri Jul 17, 2015 10:27 pm

So long story short. Maybe lol!
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Happy Re: "With friends like this............I feel blessed!" My new engine.

Post  RknRusty on Fri Jul 17, 2015 10:30 pm

duke.johnson wrote:So long story short. Maybe lol!
Haha, yeah, you said it better than I did, with a lot less words.

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Happy Spring

Post  Mike1484 on Sat Jul 18, 2015 8:24 pm

Hi Duke,

Found a spring for the .15 along with some other parts . I have 2 needle valves and springs #1109 ,1 reed valve #1108 , 1 reed retainer#1107, 1propscrewand washer #1119 and what could be a muffler for the .15
but missing the spring steel part that goes around the out side ( controls exhaust flow and noise ).except for the muffler and spring everything is in the original packing envelopes . I would be willing to sell or trade .

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