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Aviation History
1940
1940 - 0733.PDF
MARCH 14, 1940 327 Two singie-engined multi-purpose machines which are similar in that they have a fixed undercarriage and twin fins and rudders.On the left is the new Swiss C.36 and on the right the Polish P.Z.L. Sum. projectiles are stowed internally, but for the diving attacks the trap doors are locked in the closed position and a single bomb of 400 kg. (880 lb.) is suspended externally. The air brakes take the form of hydraulically operated slats below the wing just aft of the leading edge and it >s claimed that, with these brakes in operation, 180-deg. aileron turns can easily be made over a vertical path of 2,300ft. Without the brakes a speed of 400 m.p.h. is reached. Terminal velocity dives have been continued from 13,000ft. to 3,300ft. It is not without interest to compare the performance of the G-i short-range dive-bomber with its external bomb with that of the normal bomber version with internal stow- age. These figures relate to the machine as fitted with two Bristol Perseus X engines. r Bomb Load Weight of feack(s) All-up Weight Top speed Climb to 19,685 ft. Ceiling Range DIVK BOMBER NORMAL UUMBER880 lb. 880 lb. 90 lb. 90 lb. 11,240 lb. 11,900 1b. 301 m.p.h. 298 m.p.h. 10.9 min. 12.2 rnin. 30,180 ft. 29,200 ft. 560 miles 890 miles The ju 87 has brakes which are generally similar to those on the G-i, though they are in four, instead of two, sec- tions. Concerning this machine the manufacturers re- mark: "The diving speed can be limited by a diving brake. This means for limitation is not incorporated as a protection against structural failure, as requisite possibly in other designs of dive bomber, but solely in thorough appreciation of tactical requirements for effective employ- ment of dive bombers. The brake makes it possible to approach the target closely without the crew experiencing excessive acceleration when levelling out and suffering deterioration in aiming. The aircraft can be pulled out of the fastest dive with full load and with diving brake off, in perfect safety." A single large bomb of 550 or 1,100 lb. is carried on a deflector fork beneath the fuselage. Four additional bombs of no 1b. each may be slung beneath the wings, though these may displace the second member of the crew. I \ A thoroughly sectioned view of the Vultee V-11, which can be used for bombing or groundattack. Above it is shown how a single large bomb can be carried externally.
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