found: Work cat.: Vietnam/C-142 "What can be", 1965:p. 1 (brochure demonstrates how a follow-on version of the XC-142A V/STOL transport aircraft might be employed in South Vietnam as a tactical and logistic transport; also demonstrates how capabilities of the C-142 might be exploited during the initial phases of future insurgencies to support troop deployments designed to prevent extension and reinforcement of guerrilla activities)
found: Wikipedia, Mar. 21, 2017:LTV XC-142 (The Ling-Temco-Vought (LTV) XC-142 was a tri-service tiltwing experimental aircraft designed to investigate the operational suitability of vertical/short takeoff and landing (V/STOL) 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 service sponsors pulled out of the program one by one and it eventually ended due to a lack of interest after demonstrating its capabilities successfully; design was initially known as the Vought-Ryan-Hiller XC-142, but when Vought became part of the LTV conglomerate this naming was dropped; aircraft never proceeded beyond the prototype stage)
found: GlobalSecurity.org website, Mar. 21, 2017:Military/Systems/Aircraft/Past/Cargo/C-142 (XC-142. The first VTOL concepts to be tried were three "tail sitting" airplanes, the Lockheed XFV-1, the Convair XFY-1, and the Ryan X-13 Vertijet. The next concept tried was to keep the main body of the aircraft in a conventional sense but tilt the wing and engines from the vertical to the horizontal. The LTV-Hiller-Ryan XC-142A, a large four-engine, four-propeller transport, was such an aircraft; Built by an industrial team of LTV, Ryan and Hiller, the XC-142A was powered by four T-64 turboshaft engines built by General Electric and driving four 15.5-foot Hamilton Standard fiberglass propellers; The XC-142A was the largest and fastest VTOL transport airplane flying at that time; The flight of the XC-142A was successfully completed on 29 September 1964. The first XC-142A (No. 2) was delivered to the test team in July 1965. During the XC-142A program, a total of 420 hours were flown in 488 flights. The five XC-142A's were flown by 39 different military and civilian pilots. In 1966, while operational tests were being performed, the Air Force requested Vought to submit a proposal for a production C-142B. A major improvement was proposed to eliminate the Navy carrier compatibility requirement. After reviewing the C-142B proposal, the tri-services management team could not develop a requirement for a V/STOL transport. XC-142A testing was terminated and one flying airplane was turned over to the National Aeronautics and Space Administration (NASA) for research testing from May 1966 to May 1970)
found: American military transport aircraft since 1925, 2013, via Google books, viewed Mar. 21, 2017:p. 240 (Ling-Temco-Vought C-142; 1964; Type: V/STOL tactical transport; the Ling-Temco-Vought (LTV) XC-142A stemmed from earlier USAF efforts with the tilt-wing Hiller X-18 to develop a tactical transport having vertical and short takeoff and landing (V/STOL) capabilities) p. 242 (in Sept. 1961 DOD selected a consortium of Chance Vought Corp., Hiller Helicopters, Inc., and Ryan Aeronautical Co. (became LTV in 1963) to proceed on the detailed design of their VHR-447 V/STOL proposal, followed in early 1962 by a contract to build five prototypes under the designation XC-142A; the XC-142A prototype completed its first conventional flight on Sept. 29, 1964, followed by hover tests on Dec. 29, and made its first horizontal to vertical transition on Jan. 11, 1965; military test program was terminated in May 1966; a single XC-142A prototype was turned over to NASA for research and testing and in mid-1970 was flown to the USAF Museum in Dayton, Ohio)
