1m 8sLength

Exciting twilight steam traction engine dyno run. WMSTR's Rumely 2-cylinder steam tractor on the Prony Brake at the WMSTR show in Rollag, Minnesota USA. The announcer is reading the scale on the brake. After doing the math, the result was about 130 HP (97 kW) and 3,400 ft-lbs (4610 Nm) of torque. This type of steam engine can produce maximum torque at any RPM. The Prony Brake is an early form of dynamometer See http://en.wikipedia.org/wiki/De_Prony_brake