17-Passen
Page 53
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(I NIP
er 163 -mp.h. Monoplane
New Junkers All-metal eroplane Haying Trailing=eige Flaps to Allow High Flying Speed with L w Stalling Speed
NEW three-enginedmonoplane has been accepted by the Deutsche Lrift Hansa and is of sufficiently outstanding performance to warrant description to those in this country who are interested in air transport. It is capable of flying at 163 m.p.h. (180 m.p.h. with bigger engines), yet it has a 16-17-passenger cabin and will maintain height at 8,900 ft. with 'Ale engine Out of action and the other two throttled to 70 per cent. of their output. The Junkers Ju52/3m, despite its high speed, is able to land at no more than 62 m.p.h., and has a short take-off run of about
294 yards. The explanation of this, in the main, is the fitting of trailing-edge flaps between the ailerons and the fuselage, by means of which the wing lift can be considerably increased. The flaps are adjustable to any angle. Compressed-air wheel=brakea are fitted.
Ample accommodation is a feature provided by the fuselage design, the interior being unimpeded by projections. This is due to the special form of all
metal construction. Behind the central engine is the enclosed pilots' cabin, equipped for dual control, this communicating, by means of a sliding door, with the main compartment. With a wholly level and rectangular floor, this saloon has a headroom of 6 ft. 6 ins, and its capacity is 692 cubic ft.
The Ju52 is intended as a generalutility machine, suitable for operation as a passenger or a goods carrier, as a land machine or a twin-float seaplane. When used for goods it is provided with big hatches to the main compartment. One in the roof, enabling heavy and bulky goods to be lowered gently into the machine, measures 5 ft. 11 ins. by 4 ft. 2 ins. whilst one at the side, opening on the stub wing, measures 5 ft. 11 ins, by 2 ft. 11 ins. The stub wing is stoutly reinforced to permit packages to be unloaded an to it without damaging the skin.
• Behind the main compartment is a locker of 35 cubic ft., and within the central wing section below the cabin floor are three small holds totalling 106 cubic ft. These are easily reached from the outside.
• A new type of twin-keel float of 330 cubic ft. capacity has been designed by Prof. Junkers to give smooth alighting and rapid, easy take-off. Float design has always offered difficulties. Like other Junkers' low-wing monoplanes, the Ju52 is easily dismantled. The wing extensions are detachable, and tail unit can be removed en bloc. The wing centre section, as shown in the illustration below, is an integral part of the fuselage. Another feature is that the engine units are quickly interchangeable.
Equipped as a seaplane the Ju52 has a top speed of 149 m.p.h. and a cruising speed of 126 m.p.h., a pay-load capacity of 4,950 lb., with a fuel-tank range of 375 miles, and a service ceiling of 15,100 ft. (6,900 ft. with one dead engine).