Large array of Piasecki Army CH-21 Shawnee "Flying Bananas" which could carry22 fully outfitted troops. Got this photo from a friend dated around 1963-4 and may be in Nha Trang but unsure. It was powered by one radial engine and had tandem, 3-bladed, counter rotating blades, The upper angle of the fuselage was for increased clearance for the large rear blades. These aircraft were slow and had vulnerable control cables and fuel lines that made them susceptible to ground fire. They were largely replaced by Huey H-1s in 1965 time frame.