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Aviation History
1931
1931 - 0202.PDF
FLIGHT, FEBRUARY 27, 1931 Three-quarter front view which shows the mounting of the wing flaps, giving a species of slot effect over them. A FLYING LORRY >v URING a recent visit to the Junkers Aircraft Works at1 Dessau, we were privileged to see their latest freight _>/ carrier. The details of this machine are now availablefor publication, and it will be seen that it embodies several exceptionally interesting features. The Junkers Companyhave realised that there is money to be made in freight carrying, and have therefore designed this machine, theJu. 52, as an improvement on the old W.33, or Bremen type. They consider it necessary for this type of machine (1) to havea larger and completely clear cargo space which is not interfered with in any way by the internal construction;(2) that this cargo space should be so arranged as to facilitate easy and quick loading and have provision for smaller spaceswhich can be locked up when carrying valuables; (3) the running costs should be low and the pay-load high; (4) theflying range and duration should be large. The W.33/34 has now been in use in all parts of the world for several yearson many and varied kinds of work, and the experience gained with this machine has enabled them to produce the Ju. 52.A larger range and a higher maximum speed than the W.33 have been particularly sought after. The Ju. 52 is to some W.33.58 ft. 34-5 ft. 473-5 sq. ft. 159 cub. ft. 40 sq. ft. 2,646 ib. 310 Ju. 52.95//. 60 ft. 1,248 sq. ft 111 cub. ft. 113 sq.ft. 6,614 Ib. 700 extent a breakaway from the present tendency for machine- with high wing loading and fast-running air-cooled engirt and the engines for which she is designed are all of the slow running geared type, while the majority are water-cooled The following table gives a comparison between the mail dimensions of the W.33 and the Ju. 52 :— Span Length Wing area Total cargo space Floor area of cargo space Disposable load Engine horse-power It will be seen that the engine power has been increased by about 2 • 3 times, the disposable load by 2 • 5 times, and the cargo space by 4 • 9 times. A particular advance is the increase in size of the clear cargo space. Doors are provided both in the side of the fuselage and in the top, so that the machine can be loaded direct from the ground or from lorries, and also by a crane, when there are very heavy articles to be carried. At the sides of the cargo space and under the floor are several small lockers, and the cabin itself is provided with round windows, so that there is plenty of light inside to facilitate loading- The engine fitted to this first model is a B.M. W. VII of 685 h.p., but any engine, either water- cooled or air-cooled, of from 70" to 1,000 h.p. can be installs provided it is geared. Th machine itself is of the usua; Junkers all-metal construction and has proved itself to have .- very good take-off with a lo« landing speed. For this purpose the trailing edge of each win0 has been arranged as three flap5. the inner two of which on eitne side can be lowered a smau amount, in which case th^y the effect of altering the cr of the wing and increasing gliding angle, or they can lowered still more to act as *" brakes, while the outer flaps » normal ailerons. The wheels a fitted with brakes worked by j^ pressure, which facilitate 186
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