The Piper PA-18A Super Cub was introduced as a sub-model of the PA-18 Super Cub series of aircraft. The A stood for Agricultural and the model had been modified to allow a hopper. The original Super Cub from Piper Aircraft went into production in 1949. The Piper PA-18A Super Cub remains a popular aircraft to start new ag pilots in before moving them up to bigger, faster ag aircraft.—Image reproduced with permission from FLYING magazine.