There were later versions of the Comet. Version 1 was underpowered, and had too much weight reduction for that reason. By version 4, the design had been debugge

There were later versions of the Comet. Version 1 was underpowered, and had too much weight reduction for that reason. By version 4, the design had been debugged. With more powerful engines and structural fixes, the Comet 4 went into service and did OK. 46 Comet 4 aircraft were built. Last flight in 1997.