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Aviation History
1922
1922 - 0544.PDF
girder, wire-braced type, and the top longerons are not horizontal, but slope upwards towards the rear some 10°, so that the tail plane is slightly above the line of thrust. The comfort of the pilot and passenger has been specially con sidered, and each cockpit is roomy and fitted with special cane seats of ample proportions. The pilot's cockpit is at the rear, but dual control is provided for—the front control " stick " being easily removed when necessary—so that the machine can be flown from either cockpit. Instruments and engine controls are provided in both cockpits, and the engine revolution-indicator is mounted outside the fuselage, SEPTEMBER 21, 1922 taut by two wire strainers, which are quickly loosened by means of a tommy-pin, as shown in one of our sketches. Fabric is employed for the covering of the fuselage except for the engine section and cockpit decks, where three-ply wood is used, and in the nose, which is of metal. The fuselage may easily be laid bare by means of a patent lacing device, similar to that employed, in furniture upholstery. The engine, a 90 h.p. air-cooled Type IA R.A.F., is mounted direct on to the top longerons, and is partially enclosed by a metal cowling-ew»t air scoop. It drives, through the usual gearing with this type of engine, a four-bladed tractor screw 9 ft. 3 ins. diameter. The exhaust from the engine is discharged behind the rear cockpit, thus giving a silencing effect and a freedom from fumes. An orthodox V-type landing chassis is fitted in which the tubular axle is sprung, by elastic cord, from the apex of the V—the cord being protected at the bottom by a metal strip. The front and rear tie-rods of the chassis struts are encased in a streamline metal fairing, and the axle lies in a groove formed in the top of this fairing. A stout tail skid is fitted, and in order to facilitate steering when on the ground, it is connected up to the rudder bar. The principal characteristics of the P.9 are as follows :— THE BOULTON AND PAUL P.9. BIPLANE : The 90 h.p. air-cooled RA.F. engine fitted to this machine. forward of the front cockpit on the port side, where it may easily be read from either cockpit. Just behind the rear cockpit a fair-sized " boot " is formed under the turtle deck of the fuselage, for carrying suit-cases, etc. The cover for this is formed by a sheet-metal cowling with ventilators, which is held firmly in place by two wire cables passing over it, in a groove at each end, from one top longeron to the other. It is very easy to remove, as the cables are held H S H H THE LONDON-CONTINENTAL SERVICES FLIGHTS BETWEEN SEPTEMBER 3 AND SEPTEMBER 16, INCLUSIVE g|Span O.a. length O.a. height Chord .. Gap Angle of incidence Dihedral angle Area of main planes Area of ailerons Area of tail plane Area of elevators Area of fin Area of rudder Weight of machine empty Weight of machine (full load) Weight per h.p. Weight per sq. ft. Speed (full load, 1,000 ft.) Climb (full load), in 8\ mins. . . Ceiling Range (full throttle) .. 27 ft. 6 ins • - 24 „ 8 ,, 10 ,, 0 ,, ... 5 .. 6 „ 5 .. 6 ,, .. 2° •• 2£° .. 285 sq. ft. .. 38 ,. 24 ,, i4i .. 2J „ 8f „ 1,244 lbs. . .' i,77° - •• 17-7 .. .. 6-3 „ 104 m.p.h. 5,000 ft. 14,000 ft. . . 3 hrs. Route J Croydon-Paris Paris-Croydon ... Croydon-Brussels Brussels-Croydon Croydon-Rotter dam- Amsterdam. Amsterdam-Rotterdam- Croydon. Totals for 2 weeks. ... No . o f flights * 103 no 12 12 12 n 260 No . o f passenger s 295 33i 62 61 3 25 777 No. of flights carrying Mail s 38 22 — 11 9 80 Good s 72 64 — 11 9 156 No . o f journey s completed ! IOI 97 11 12 12 10 243 Averag e flyin g tim e h. m 2 24 3 i° 2 20 2 44 2 35 2 57 Fastest time made by D.H. 34 G-EBBU (ih. 47m.) D.H. 34 G-EBBU (ih. 58m.) D.H. 34 G-EBBW (ih. 56m.) D.H. 34 G-EBBW (2h. 3m.) Fokker H-NABM (2b.. gm.) Fokker H-NABV (2h. 9m.) Type and (in brackets) Number of each type flying B. <5), D.H. 34 (6), G. (10) H.P.W.8B (3), Sp. (5), Vi. (1) B. ( 5), D.H. 34 (6). G. (10) H.P.W.8B (3), H.P. 400 (1) Sp. (5), Vi. (1). D.H. 18 (1), D.H. 34 (4). D.H. 18(1), D.H. 34(4). F. (6). F. (6). * Not including " private " flights. f Including certain journeys when stops were made en route, t Including certain diverted journeys. § Rotterdam. Av. = Avro. B = Breguet. Br. = Bristol. Bt. = B.A.T. D.H.4 = De Havilland 4, D.H.9 (etc.;. F. = Fokker. Fa. = Farman F.50. G. = Goliath Farman. H.P. = Handley Page. M. = Martinsyde. Sp. = Spad. Vi. = Vickers Vimy. Vu. = Vickers Vulcan. W. = Westland. The following is a list of firms running services between London and Paris, Brussels, etc., etc. :—Co. des Grandes Expresses A6riennes ; Daimler Hire, Ltd. ; Handley Page Transport, Ltd. ; Instone Air Line ; Koninklijkie Luchtvaart Maatschappij ; Messageries A6riennes ; Syndicat National pour l'fitude des Transports Aeriens ; Co. Transaerienne. Incidental Flying.—A bi-darly service between Lympne-Ostend has been maintained by the De Havilland Co. A busy time was spent at Croydon by the Aircraft Disposal pilots testing various machines. 544
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