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Aviation History
1940
1940 - 0730.PDF
226 MARCH 14, 1940 when diving with flaps down. The machine has been developed into the S.M.86, which has a higher perform- ance. Mr. Folland advocates the adoption of a super-fast unarmed single-seater dive-bomber and maintains that such a machine could be made at least as fast (with re- duced factors at the start) as an intercepter fighter despite the fact that it would have a range of .1,400 miles. One would presume in view of its cleanness (estimated top speed 470 m.p.h.) that some extremely efficient form of diving brake would be needed ; possibly a reversible-pitch type oi airscrew would be used in addition to aerodynamic brakes. Outstanding among the two-seater dive-bombers is cm own Blackburn Skua which is fitted with special hydrau- lically operated speed-reducing flaps. When fully depressed these limit the diving speed to about 220 knots (255 m.p.h.). Dive-Control Exhibitions of "dive-control" have also been given in public by two other foreign dive bombers, one a version of the Fokker G-i and the other the Junkers Ju 87. As there is no airscrew in the nose of the Fokker the problem of guiding the bomb clear of the structure is simplified and aiming facilitated. For normal horizontal bombing the On the left are Fairey Battles of the R.A.F. in the act of " peeling off " from an echelon formation to deliver a dive- ;• bombing attack. Many of the Continental bombers have vertical bombstowage. Below on the left a Heinkel He IliK is seen being " bombed up," while on the right a large projectileis being persuaded into the bomb cell of a Ju 86K. Dive-Bombers Designation ot Aircraft GREAT BRITAIN Blackburn Skua . Hawker Henley Fairey P.4'34 AMERICA BellBG-1 ... Brewster XSBA-I (138) ... Curtiss SBC-4 (Helldiver 77). Douglas DBI9 Vought SB2U-1 (V.I56) ... GERMANY Blohmand Voss Ha.137 . - Junkers ju.87 HOLLAND Fokker G.I Span It. in. 46 2 47 10 47 4J 36 0 39 0 . 34 0 41 6 42 0 36 7 45 4 54 IJ Wing Area sq.ft. 312 342 346 353.8 259 317 318.6 305.3 252.8 344 384 Wing Load- ing Ib./ SO. ft. 21.8 26.4 25.4 17.3 23.16 18 20.5 21.3 2126.7 27 Gross Weight lb. 6.811 9.050 8,787 6.641 6,000 5.710 6,527 6,500 5313 9,200 11,243 JiM tSTI¥_ ib. 1,321 3,350 2,382 2.821 2.000 1,544 2,025 2,000 1,320 3,000 3,637 Engine Type Bristol Perseus XII Rolls-Royce Merlin 11 . Rolls-Royce Merlin 11 ... Wright Cyclone F56 Wright Cyclone G. • . Wright Cyclone G3 P. and W. Twin Wasp Jr. P. and W. Twin Wasp Jr. Junkers Jumo 210:Junkers Jumo 211 .. Bristol Perseus X IfI A L L A A A A A L L A Rated Power h.p. 745 990 990 755 750 840 750 750 680 940 1,460 MM. At-Speed tained at m.p.h. ft. 225 6.500 300 17 500 284 17,200 206 11,300 285 - 235 9,800 223 - 257 — 205 6,560 240 - 300 - Climb To In it. miii. 19,680 15 13,120 9 19,680 11 Service Ceiling It. 20,200 29,000 29.600 24,950 25,700 25,000 28.200 22,960 25,000 29,000 TypicalA rmament 5 remg 2 rung 2 remg 2 remg 2 remg 2 remg 2 remg 2 remg 2 remg 3 remg 5 remg 1 a. OPis IP AO IP IS IS IS PA IS IS
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