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Aviation History
1920
1920 - 0175.PDF
FEBRUARY 12, 1920 ~fr characteristic feature of this machine is formed by the centresection cabane, which is in the form of struts, thus doing away with cable bracing in this part of the machine also. Itshould further be noticed that the interplane struts are braced by means of a diagonal strut instead of cables. Bj£this arrangement the erecting of the wings is very much simplified. Rigging and trueing-up is done by means oftelescopic adjustment of the incidence strut. The extra- ordinarily small chord of the ailerons will be noticed, but itshould be pointed out that these were found to be quite effective enough. This has to do with the air flow roundthe very deep wing section. The engine was a no h.p. Oberursel. The Fokker D VI has been employed on theItalian front as well as for home defence. " In February, 1918, the Fokker D VII made its appear-ance. This machine was the result of a series of no less than 22 experimental machines. It is worthy of mention rudder. As an example of the diving speed and strength 01the Fokker D VII, it might be mentioned that the writer in July, 1918, was able to come down from a height of 1,000 metres,in a vertical dive with a Fokker D VII, which was on fire. It was possible for the writer, by letting the machine turnover on reaching the ground, to get clear of the wreck, which was later totally burnt." In April, 1918, the Fokker D VIII monoplane, shown in Figs. 13, 14 and 15, made its appearance. This, machinewhich was provided with an Oberursel engine of 140 h.p., represented the last word in single-seater fighters. Thewings are of the cantilever type, and are placed above the fuselage. A peculiar feature of this machine is the employ-ment of three-ply for the covering, experiments with which had already been made in previous Fokker experimentalmachines. Peculiar is also the extremely small size of the ailerons. The wing covering is doped with a special pre- MORE FOKKER MILESTONES: 15. The D VIII. 16. The V 29. 17. The V 36 Type. E.I .. E. II ..E. IV .. D. I ..D. II .. D. Ill ..D. IV D. V ..Dr. I D. VI ..D. VII.. D. VIIIV. 36 .. a 4> 'be Hi o.o. 0. M. O. O. M. O. O. o.B. O. B. 8o IOO 160 I2O IOO 6io 160 IOO no no i85 140 18S Table ol Weight. |I 787880 1,025 1,020 845 995 1.335 800 825 865 1.515890 1,400 ill 1,240 I.34O i,59°1.475 1,270 1,560 1,850 1.245 1.2551,283 1.995 I.33O 1.9i 5 ' Weights A 172 172 172 236 193 215226 167 172 184 217 "5 189 ih 7- 7- 9- 6- 6- 7- 8- 7- 7- 7- 9- 11 • 10 • , Dimensions •4-ii 2 8 2 25 55 27 2 5 27 05 2 6 15 • T)d d O •« I- <0 tD X* O bePM_g 15 13 9 12 12 9 11 12 11 11 10 9 9 •5 •4 •95 •3 •7 •75 •6 •45 •45 •8 •6 •5 •85 c ( J ! tt. 22 23 24 18 21 20 20 20 19 19 23 19 21 and t i ! in. 3 10 10 10 2 10 10 00 00 6 0 5 4 Performance a a* ft. 29 31 33 29 28 29 32 28 22 25 29 27 29 in. 6 5 0 10 10 10 0 10 2 5 4 6 6 !§>8 X ft. in. 9 7 1 9 7 8 7 8 7 9 9 9 9 10 6 1 2 5 5 7 0 7 0 3 8 4 1 of Fokker Machines m.p.h.80-5 86-899 0 93 0 93 °99 0 99 0 105-5 124-0 124-0 124-0 124.0 124-0 00 rn 7 5 3 5 * 4 3 3 — 1-75 2-5 1-75 2 i-75 Climb 6 20 15 8 11 8 7 5 — 3-755-5 4 4-5 4 (in mins.) tc & 40 3°15 16 15 12 12 19 6-5 9 7 7-5 6-75 8 25 28 24 2O 2O 10 13-5 IO-2 IO.7 10 1 feet. i vd 3O X4'5 19 I4 15 13-5 8 00 — —— — —— — —— _ 18-7 19-5 18-2 O. = Oberursel M. = Mercedes. that the experimental Fokker machines with cantileverwings date back as far as 1916. The Fokker D VII, shown in Figs, n and 12, has proved itself superior to all other types,including such enemy machines as the Spad single-seater. It was at first fitted with a 160 h.p. Mercedes engine, butsoon after also with the 185 h.p. Bavarian Motor Works engine. This efficient engine improved the performanceof the Fokker D VII considerably. The employment of a fixed water-cooled engine made the machine especiallysuitable for the hard wear and tear of work at the front. " Characteristic of the Fokker D VII is the nose radiator,which even at great heights made the life of the pilot bearable. The main planes are so staggered that the view is very good.The machine-gun arrangement was such that the pilot had easy access to them during flight, as they could be reachedfrom his seat. With regard to the control surfaces of the D VII, it should be pointed out that in addition to the fixedtail planes there was also a fixed vertical fin in front of the B. = Bavarian Motor Works. paration, which renders them weather-proof. The strengthof the Fokker D VIII is even greater than that of the Fokker D VII. Thus loading tests with 24 persons on the wingswere carried out in the presence of Mr. Fokker himself. The special advantage of the Fokker D VIII for work at the frontwas the excellent view, which was far better than that obtain- able in any other type. For use after the War the FokkerD VIII may be considered the ideal sporting machine, all the difficulties and drawbacks which attend every new formof construction having long ago been eliminated from the machine."A number of other Fokker single-seaters have been produced, partly experimental machines and paxtly militarymachines, which did not, however, arrive at the front owing to the Armistice of November, 1918. In Fig. 16 is shownthe Fokker type V 29, which, generally speaking, resembles the Fokker D VIII, but which has a fixed water-cooledengine and a nose radiator. Here again one notices a change- 175
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