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Cox Engine of The Month
December-2017
1/2A Nut's

"Chrome Moly TD .020 RC"



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throttle/speed control manually while flying

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throttle/speed control manually while flying

Post  unclemoon on Sat Feb 16, 2013 8:24 pm

Has any one used a throttle/speed control that can be operated manually while flying? not a RC type. but like a third line?
Thanks UncleMoon!
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Re: throttle/speed control manually while flying

Post  dckrsn on Sat Feb 16, 2013 8:49 pm

I thought that was more common on bigger c/l planes.
Poked around a little and found this thread with an .049 application.
http://www.rcuniverse.com/forum/m_9079881/anchors_9079881/mpage_1/key_/anchor/tm.htm#9079881
Bob
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Re: throttle/speed control manually while flying

Post  Cribbs74 on Sat Feb 16, 2013 9:03 pm

I think Cox employed a 3 line setup on some of their RTF models. I am pretty sure the PT Ryan .020 did. I have the engine out of one and it had a throttle ring and a little hole drilled through the crankcase for a spring I presume.

Ron
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Re: throttle/speed control manually while flying

Post  dckrsn on Sat Feb 16, 2013 9:10 pm

Here's a product .049 with the "banjo spring" from Martin's site.

Bob
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Re: throttle/speed control manually while flying

Post  Cribbs74 on Sat Feb 16, 2013 9:20 pm

Well, there ya go!

Mine didn't have the spring. No matter though as I took the cylinder set and throttle ring off and put it on a TD .020

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Re: throttle/speed control manually while flying

Post  duke.johnson on Sat Feb 16, 2013 9:45 pm

http://coxengines.ca/cox-.049-rc-flyer-engine.html

Te abov link is thbest way I've seen to run 1/2A throttle. I bought the backplate/throttle only then modified an old engine. I started paint today on a .049 proto type, if the wheather holds Sunday I should have it complete enough for a picture. I fly .40 size carrier now and I'm starting a new .15 size tonight. Then after that a .36 size. Throttle planes are a blast.
Duke
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Re: throttle/speed control manually while flying

Post  unclemoon on Sun Feb 17, 2013 2:04 am

Well that shows how new I am to this. I thought I had a new idea but it looks like I am over 40 years too late!
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Re: throttle/speed control manually while flying

Post  duke.johnson on Sun Feb 17, 2013 10:56 am

unclemoon wrote:Well that shows how new I am to this. I thought I had a new idea but it looks like I am over 40 years too late!

I' say about 65 years to late ifI had to guess. I believe the first NATs carrier contest was 1952. But its not to late to join the fun. I'll send some pictures after church of tonight if we still have flying weather.
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Re: throttle/speed control manually while flying

Post  duke.johnson on Tue Feb 26, 2013 9:25 pm

Here's those pictures I promised.








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