|The Shanghai Y-10 (Y - Yunshuji - transport) was a four engined commercial passenger jet aircraft developed in the 1970s by the Shanghai Aircraft Research Institute. Rumours of a reverse-engineered copy of the Boeing 707 were unfounded as the Y-10 bears only a superficial resemblance to the 707 with design/manufacture starting before the first 707 was imported to China. After a thaw in relations with the West in 1972, China had acquired a Boeing 707 fleet, but decided to forge ahead with its own jetliner that was free of dependence on foreign parts, except for the American engine.|
Due to non-availability of the intended WS-8 turbo-fan engines the prototype aircraft used Pratt & Whitney JT3D-7 turbofan engines, acquired as spare engines for CAAC's small fleet of Boeing 707 aircraft. The cabin could be configured to seat 178 in high-density, 149 in economy, or 124 in mixed-class and the large flight deck had accommodated five crewmembers: pilot, co-pilot, flight engineer, navigator, and radio operator.