Cox Model Engine - Use in Radio Controlled Models

Use in Radio Controlled Models

At the time Cox developed the first Cox engines, they were used in Control line and Free flight model planes as there was no market for throttled Radio Control engines back then. Radio Control, although first developed in the 1890s it was not available for model airplanes until the 1950s and did not become economically viable for small model planes until the mid-1970s and even then was for the modelers who could afford it. It was certainly out of reach of the hands of most children.

From the mid-1960s Cox produced throttle control devices for some of their engines, however these were not as effective as throttles on other brand engines as the Cox throttle worked by restricting exhaust flow. Exhaust throttles were produced for most Bee and all Medallion engines but not Tee Dee.

It wasn't until 1988 that Cox produced an engine with a true R/C carburetor and that engine was the Queen Bee .074. Then in 1994 Cox finally produced the Tee Dee .05 and .09 which both had a conventional R/C carburetor, with adjustable airbleed, and a full muffler.

In 2010, an after market R/C throttle/choke has been developed for the .049 reed valve engines. This throttle is attached to the choke tube on Sure Start .049 engines and can also be adapted to fit .049 reed valve engines with an integral tank. The throttle was developed by Saras Associates and is being marketed through Cox International.