sentences:  Dornier also developed the fastest piston-engined fighter of the war, the twin-engined Do 335, which was too late to see service.After WWII aircraft production was again forbidden in Germany, and Dornier relocated to Spain and then to Switzerland where the firm provided aeronautical consultancy services until returning to Germany in 1954.Post-war, Dornier re-established itself with successful small STOL Do 27 and Do 28 transports.