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Aviation History
1918
1918 - 1109.PDF
lua • S try •E., Side v.ew of the Fokker biplane. or of actual construction. The machine which has been the subject of investigation was unfortunately rather ex- tensively damaged, thus making absolute accuracy of descrip- tion difficult, and trials of performance impossible. A similar machine, however, has been tested for performance by the French authorities, who have issued the following report :—, Altitude. Time of climb. Speed at this height, m. s. m.p.h. 4 metres. 1,000 2,000 3,000 4,000 5,oocf feet. 3.281 6,562 9.843 13.12416,405 13 22 38 1518 4948 5 TI6-6 114*1 109-7 103-5 94'9 The following data regarding weights is taken from a French source:— ! Aii ate I ures JL a rver erm r lo- d ui dive of tWs^t of fuselage, complete with engine, &cWeight of upper wing with ailerons i Weight of lower wing ,' Weight of fin and rudder f Weight of fixed tail plane Weight of elevators 1,322 -2 lbs. 167 -2 99 6-6 17-6 9-9 1,622 -5 [The schedule of principal weights given below is the result of weighing the actual components mentioned, which were taken from the aeroplane allotted G/2B/14 ] A different French report gives the following figures, which • are taken from inscriptions found on one of the Spandau y -ii a captured Fokker of the same type :— Weight, empty .... ..' .. 1,540 lbs. Permissible load (useful load and fuel) .. 396 lbs. Reproduced from the Official Report. • .-. Schedule of Principal Weights. lbs. Upper wing, complete with ailerons, pulleys, bracing wires, fabric and strut fittings -. . .. ..156 Lower wing (no ailerons fitted), complete with strut fittings and fabric .. .. .. .. • • 97 N strut between wings.. . . . . .. . . 6 Straight strut, between fuselage and trailing spar of upper wing .. .. .. .. .. ,. 2 Aileron frame, with hinge clips, without fabric . . 4 Rudder frame, with hinge c!ips, without fabric .. 4 Fin frame, without fabric .. .. .. .. 1 Tail planes (complete in one piece), without fabric. . 12 Elevators (complete in one piece), without fabric . . 11 Radiator, empty . . . . . . • • . . 48 Undercarriage strut, each . . . . .. . . 2 Undercarriage axle, with shock absorber bobbins .. 18 Bobbin, each .. .. .. .. .. .. o Shock absorber, each .. .. .« ..1 ;-r- 3 Undercarriage (complete), without wheels and tyres, and without plane, but including struts .. .. 29 Aluminium tube, forming rear spar of undercarriage plane . . .. . . .. .. . . . . 1 Wheel, without tyre and tube .. .. .. 11 Tyre and tube .. .. . . .. . . . . 9 Tail strut .. . . .. . . .. .. 1 Fabric, per square foot, with dope.. .. .. o Bottom plane compression rib .. -,•,-• • • o Bottom plane, ordinary rlt> . . . . —vy- . . o Top plane ordinary rib, at centre of plane.. .. 1 Bracket, with bolts, attaching top plane to fuselage struts .... . • • • • • • • • • I Main spar, top plane, including fillets for ribs, perfoot run in centre .. .. • • • • • • * Owing to tapering ends the average weight per foot of spars will be slightly less than this figure. : '....• oz. o o 9 11 T A~~T 6 2 O IO 2 79 4 15 1 15 11 11 12 the Three-quarter rear view of the Fokker biplane. 'Reproduced from the Official Report on this machine. 1110 >•.•••;-..
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