Cox Models

This product was developed into a "whip car", a tethered vehicle which could be manually swung in a circle at high speed.

Nitro- and gasoline-powered tether cars with .60 cubic inch miniature engines capable of speeds of 100 mph (160 km/h) were quickly becoming popular.

Cox's first contribution to that growing hobby was a cast aluminum midget racer powered by a .09 and .15 engine by Cameron Brothers of Chino, California.

Cox Manufacturing enjoyed a large postwar growth due in part to its production of miniature model internal combustion engines and control line model aircraft, finally moving to a new factory in Santa Ana, California, in 1963.

Three expansions in a few years' time saw expansion to 225,000 square feet (20,903 square meters) and introduction of a line of slot cars, model rockets, HO scale model trains, and a full-sized, one-horsepower gasoline-powered chain saw.

Growth of the company continued, but its factory space became fragmented since the operations were spread out over a number of leased buildings.

The claim of dimensional tolerance, in the advertisement shown above, is justified by the facts that the high production volume engines need no break-in, except for a one-minute rich run, and any piston will fit into any cylinder that is the same size.

The most substantial change (not visible) is in the carburettor, which now has a large brass spray bar / barrier crossing the round barrel aperture, with a jet hole in its back center.

In addition to 0.049 cubic inch (0.80 cc) variants such as these, the 0.020 cubic inch (0.33 cc) Pee Wee was also sold, in large quantities and over several decades, in ready to fly or run models and separately to power other models.

Note, on the Tee Dee shown, that light shows through the external ports, under the piston (sub induction).

This increases the charge of mixture and makes the ignition timing track to engine speed to maintain power over a wider range of rpm.