This is a Meccano model of the Gandy Hand Cars, that were used for testing the track by U.S. railroads. My model is powered by a magic clockwork motor. It pulls a trolley on which another person is sitting, perhaps the boss of the gangmen operating the trolley. The model takes one and a half rounds of my O gauge track, with the trolley, with one winding of the clockwork motor and two and a half rounds, without the trolley. I have used 20b flanged wheels for both the hand car and the trolley.