The mighty Otto KV-50! With a 14 inch bore and a 22 inch stroke, it displaces 3,387 cubic inches. Rated power was 50 horsepower at 230 rpm and at that speed, it was cranking out a calculated 1142 lbs-ft. of torque. The listed fuel consumption at full load was around 3.5 gallons per hour... very economical. The engine had a shipping weight of 19,000 pounds. This particular engine was installed into a Lewisburg, Pennsylvania, ice plant in 1929 and ran an ammonia compressor as well as an AC generator. It was in full operation until the late 1950s, then on standby service for another decade. It was donated to Coolspring in running condition by the owner, Fred Coburn, in 1994. It was set up in the Earle T. Harvey building at Coolspring and the display was built to look like the area in which it was originally installed. The original compressor and AC generator is also mounted nearby and occasionally operated.