400 h.p. Lorraines
From Jane's all the World's Aircraft 1925
THE FARMAN F3X “JABIRU.” A passenger-carrying monoplane of very curious appearance. A wing of very great chord and thickness in the centre is built into the top of a fuselage not unlike that of the “Goliath.” This wing tapers very acutely towards the tip- it has a chord of 6 m. (19 ft. 8 in.) at the centre and of only about 3 m. (9 ft. 10 in.) at the tips. At the bottom of the fuselage there are two short projecting wing roots, carrying at each of their ends a pair of 180 h.p. Hispano-Suiza engines in tandem. From the engine-mountings a pair of diagonal struts runs upward and outward to the main wing, another strut runs upward and inwards to the junction of fuselage and main wing, and below the V of the undercarriage projects downwards. Side-by-side seating for two pilots is arranged at the top of the fuselage, ahead of the wing. Below this is a luggage compartment and behind the passenger cabin, which has space for twelve seats. The fuel tanks, of 1,000 litres total capacity, are carried in the wings, above the engines. The machine was designed and built to satisfy the requirements laid down by the Aero Club of France in the rules for contest for the Grand Prix des Avions de Transport, 1923, and the machine was classed first in that contest, winning a prize of 500,000 francs. Since its first appearance with four Hispano-Suiza engines, this machine has been fitted with a variety of engines. One version has three 260 h.p. Salmsons—one in the nose of the fuselage and one on each side. Another version carried two 400 h.p. Lorraines, each replacing one pair of Hispanos. This latter version was exhibited at the 1924 Paris Show. The dimensions are the same as those of the Hispano-Suiza-engined type, and the weight is increased by 200 kgs. (441 lbs) both empty and loaded. The speed with Lorraine engines is 208 km.h. (129 m.p.h.).
Drawings from JAWA, four engine version
