This is the smallest of the Cox “Tee Dee” engine series. It turns up to 30,000 RPM with a 3 x 1.25 prop. The TD engine line is based on the design ideas of Bill Atwood and appeared in 1961. The engine was made by Cox, which was founded by Leroy Cox. The engine was produced starting in 1960 until 1978 with gold anodized crankcase and propeller driver and red plastic parts. Production was sporadic, depending on sales.
