Complex sentence: His earlier base at Bydgodaszcz had become unreceptive to civilian flying but another regiment at Kraków was much more sympathetic, so he attempted to take the D.K.D.1 there but early in the flight the old Haacke engine failed and the D.K.D.1 was badly damaged in the emergency landing.
Split into simpler sentences: His earlier base at Bydgodaszcz had become unreceptive to civilian flying but another regiment at Kraków was much more sympathetic, so he attempted to take the D.K.D.1 there. Early in the flight the old Haacke engine failed and the D.K.D.1 was badly damaged in the emergency landing.