sentences:  The Mailplane had seen no commercial interest, so the design was re-worked as a passenger carrier.This re-designed aircraft was designated the Spartan Cruiser, and the prototype (G-ABTY) first flew in May 1932, piloted by Louis Strange.The original three-engined low-wing format had been retained, but the plywood fuselage was replaced with an all-metal fuselage to carry six passengers and two crew.