Early versions of the Typhoon had an enclosed canopy with and exit door on the starboard side. Known as car door typhoons these aircraft served from their introduction in 1942 until 1944 when bubble top versions of the aircraft began to replace them. Despite their deadly reputation over the skys of Normandy, the Typhoon was not without its share of issues. The Sabre engines in the aircraft had ongoing reliability problems which was not particuarly reasurring to pilots especially when flying over the open water of the English Channel but even more terrifying to pilots was that the tail section could break away from the airframe under the extreme stress of a dive or tight G maneuver with usually fatal results. The tail section was eventually reinforced and based on the success of the tempest airframe larger horizontal stablizers were implemented to provide greater stability to the aircraft which were known as tempest tail planes. These later aircraft also had a four blade propeller installed for greater performance.