FOUR-MOTOR NIGHT BOMBER. Photographed in 1933, immediately after final erection, but before service roundels applied, is this "one-off" French prototype, the Potez Type 41 Bn4, which was succeeded by the later Potez Type 54. The two pairs of pylon-mounted Hispano-Suiza 12 Ybrs engines delivered a total of 3,360 h.p., giving a max. speed of 199 m.p.h. for a.u.w. of 37,480 lb. at 13,120 ft. Its undercarriage was retractable.