Jim There was never a manufacturer before cox and they date back somewhere to about fifty four or so. The original offerings were called Spacehoppers. Spacehopper, Tee Dee, Medalion and the Bee series were all just marketing names for a huge variety of types over the years with differant induction and throttling among other things as you mentioned in sizes of: .010, .020., .049. .051, .074 and .09.

The only larger engine ever marketed by them was the Conquest .15 a front rotor engine that was quite popular in controlline racing and with contemporary freeflight. These were later produce with RC carburators. They were excellent performers and still have quite a reputation. there was never a .19 (mass produced anyway)

Dan

This is the engine you are looking for. Cox sold the rights to it before the Estes buyout and RJL in Ca. still produces new ones periodically to this day and are a made in both Ukie/freeflight version as well a carburated RC version.

John