Think you meant 1954. The glow plug originated around 1948. The first airplane Cox 049 was the Space Bug which I had one of in 1954. then Space Bug Jr, Thermal Hopper, Babe Bee, Pee Wee, Space Hopper, RR-1, on and on. I think the two US made engines with the longest continuous production are the Fox stunt 35, and second the Babe Bee.