Steam Traction Engine – Peerless 50 HP on Dynamometer

One of the things that is done at the engine meet is test the engines. An air dynamometer is connected via the belt in the foreground and a tachometer measures the RPM's of the blade. The RPM's are translated to Horsepower using a chart. The load is provided by air resistance. Other pictures of displays at the Williams Grove Steam Engine Meet – 2008 are in this collection.