Boeing 707-320 - the distant passenger plane developed by American firm Boeing. The plane is the further development of initial model 707-120. Differs in the increased sizes of a fuselage and a wing, big a stock of fuel and range of flight. Firm "Boeing" has started working out of the plane in December, 1955 under the offer of airline Pan American which planned to carry out flights through Atlantic to Europe. The first flight 707-300 has executed the plane on January, 11th, 1959, and in the middle of July has received certificate FAA. Operation has begun in the end of August, 1959 By the plane engines Pratt and Whitney JT4А-3,-5,-9,-11 and v12 by draught on 7150-7950 kgs were used.