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Cox Engine of The Month
October-2019
colibriguitars's

Dieselized .049 with no Teflon disk or o-rings.

More info on this engine!



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Post  ian1954 on Mon Jan 27, 2014 3:12 pm

Because I have a few small electric motors - my preference is to use a prop saver on these. I invariably manage to lose the "o" ring after the propeller has plopped off.

I found that if you buy "o" rings from a "specialist" model store or an "o" ring designated for a prop saver through Fleabay - they are expensive - £1 for three.

However, wander down to the plumbers merchant and get a big bos with a variety of sizes for £5.

"O" ring wheels Oring_10

Trouble is - there are far too many large ones that I would never use.

Then while perusing the CEF Speed Contest forum - I saw what Roddie had done

"O" ring wheels 11-19-10

and thought that's easy and another of his good ideas. I have hundreds of "o" rings.

So, a few minutes design and printing "et voila"

"O" ring wheels Oringw10
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Post  Jason_WI on Mon Jan 27, 2014 4:57 pm

Thise are kinda like the wheels that they use on the GWS slow stick. Nice and a good use of on hand parts. Do you have the STL for the wheels?
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Post  getback on Tue Jan 28, 2014 7:13 am

THANKS just gave me an idea I need a 1/2" tail wheel and would have to drive 30 miles to get it , if I can find something 7/16" round and make two pieces of thin ply and sandwich an o-ring in or on there ill have one cheap wheel as my labor is cheap! Blow up Mad! 
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Post  roddie on Tue Jan 28, 2014 9:58 am

Ian... I LIKE those wheels! I'll bet that the O-ring tire stretches onto the rim.. nice and tight too! Now you can make pairs of different sizes.. and tailwheels too!

Please see my question in your 3-D printing thread. Thanks,

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Post  Cribbs74 on Tue Jan 28, 2014 12:11 pm

I like it Ian. Do you take custom orders?
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Post  ian1954 on Tue Jan 28, 2014 2:46 pm

Jason_WI wrote:Thise are kinda like the wheels that they use on the GWS slow stick. Nice and a good use of on hand parts. Do you have the STL for the wheels?

Hi Jason,

Check your mail.
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