Check the listing for details. HO Scale 1:87 Sikorsky UH-60 Blackhawk Helicopter Trainload - US Army - OD Green. Condition: New, Made in United States. Listed at 23.00 USD. Can be built as shown or used as trainload. See pictures. Sikorsky submitted a design for the United States Army's Utility Tactical Transport Aircraft System (UTTAS) competition in 1972. The Army designated the prototype as the YUH-60A and selected the Black Hawk as the winner of the program in 1976, after a fly-off competition with the Boeing Vertol YUH-61.Can be built as shown or used as trainload. See pictures. Sikorsky submitted a design for the United States Army's Utility Tactical Transport Aircraft System (UTTAS) competition in 1972. The Army designated the prototype as the YUH-60A and selected the Black Hawk as the winner of the program in 1976, after a fly-off competition with the Boeing Vertol YUH-61.