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

"TD .020 RC"

More info on this engine!

CEF Traveling Engine

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Cox "RR-2" Empty Cox "RR-2"

Post  Mudhen Sun Oct 21, 2018 3:40 pm


Last edited by Mudhen on Tue Nov 16, 2021 5:47 pm; edited 1 time in total
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Post  Admin Sun Oct 21, 2018 4:04 pm

Really cool! A prototype in its earliest roughest form. You can almost see what was going on in Dale's head when he was making it.

Thanks for sharing.



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Post  Cribbs74 Sun Oct 21, 2018 10:15 pm

A rear rotary engine could be adapted to many different applications and would have had a market. I wonder why Roy had little interest. Granted the prototype shown is very rudimentary and if presented as is might have turned him off.

It kind of makes me want to flip a TD backwards. Use the Delin carb body from a TD on the backside held on by a turned down venturi nut. Problem is playing around with an RR1 would get me burned at the stake!

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Post  GallopingGhostler Sun Oct 21, 2018 10:25 pm

I think a good possible reason was simply costs. There was more machining work and parts for a rear rotary valve engine than the straight forward Tee Dee, which already fit the bill. That's what basically killed the RR-1. Engines were highly competitive cost-wise, and Cox ended up being the half-A leader for what, 35 years? By the end of the 1960's, nearly all other engine manufacturers stopped making half-A's.
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Post  getback Mon Oct 22, 2018 9:33 am

Interesting how he put the beam mounts on , and now you got 1/2Anut taking them off Medallions and using the screw on mount from Greg , he does good work in my option . Keep us informed on the progress if you would Mudhen . Small Cox Logo
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