High Quality Content by WIKIPEDIA articles! The Ling-Temco-Vought (LTV) XC-142 is a tiltwing experimental aircraft designed to investigate the operational suitability of vertical/short takeoff and landing transports. An XC-142A first flew conventionally on 29 September 1964, and on 11 January 1965, it completed its first transitional flight by taking off vertically, changing to forward flight and finally landing vertically. Its participants pulled out of the program one-by-one and it eventually ended due to a lack of interest after demonstrating its capabilities successfully.