While stationed at Hickham Field in 1951, I was assigned to the 1266th Air Transport Squadron as Flight Engineer on YC-97 and C-97A aircraft. It is my understanding that only six YCs had been built, five of which were assigned to the 1266th. They were used primarily for short flights to Johnson and Wake Islands while the C-97A was used for supply and air evac missions to and from the Korean theater. The YC was equipped with 3350 Wright Cyclone engines, Curtis electric reversible props and deicing boots. The engineer was seated between and just to the rear of the pilots. The airplane loved the ground and required a lot of runway and coaxing to fly.
In contrast, The C-97A had P&W R4360 engines with Hamilton Standard reversible props (worlds of difference). Heated leading edges were far superior ro the deicing boots used on the YC.