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Aviation History
1926
1926 - 0881.PDF
DECEMBER 2, 1926 Hanriot H.41 Training SeaplaneThe Hanriot H.41 (120 h.p. Salmson) training seaplane is an adaptation to the requirements of naval training of thewell-known Hanriot H.D.I4 training landplane' on which Lieut. Thoret made his famous powerless flights of severalhours' duration. The H.41 is a twin-float biplane of orthodox timber construction, wire-braced and fabric covered. Thefloats are built of crossed planking, and are secured to the fuselage by steel tubes. Specification of the Hanriot H.41 Span, 10-26 m. ; length, 8 m. ; wing area, 34-9 sq. m. ; weight empty, 725 kg. ; weight loaded, 1,000 kg. ; maximum speed, 120 km.p.h. • minimum speed, 52 km.p.h. Hanriot HA4S Ambulance AeroplaneThe Hanriot H.14S ambulance aeroplane, which was extensively used during the recent campaign in Morocco,where it rendered great services, is again an adaptation of the H.D. 14 training aeroplane. The H.I4 is fitted with a longitudinal compartment whichaccommodates one stretcher case. A folding seat is also provided in case it is desired to carry the wounded in aseated position. KOOLHOVEN MR. FREDERICK KOOLHOVEN, who will be familiar to most ofour readers from his work in England before, during and after the war, is exhibiting a very interesting little machine at theParis Show. The most unusual feature of the machine, which is to be known as the type F.K. 35, is that it can be convertedfrom monoplane into biplane and vice versa. Normally the machine is intended to be a low-wing monoplane, two-seater THE KOOLHOVEN F.K. 35 is a " Jupiter "-enginedtwo-seater fighter, which can be converted from mono- plane to biplane and vice versa. fighter, but for use by the air forces of smaller nations whowish to make a special study of economy, the machine can be turned into a biplane and used for reconnaissance. Thefuselage is of all-metal (tubular) construction, while the wing is of wood and covered with ply-wood. The engine fittedis a Bristol Mark VI " Jupiter." The F. K. 35, in addition to its dualremarkable features in its design, Mr. ever been strong on originality. Thus,which are housed in the wings, are so suspended inside the wings that they can be dropped in case of trouble by thepulling of a lever in the pilot's cockpit. The under-carriage has a very wide track, so that there should be small risk ofthe machine turning over on the ground. Shock absorption is by an oleo cylinder, a type of undercarriage used byKoolhoven since about 1915. Another interesting feature of the F.K. 35 is the mechani-cally operated gun-turret, which enables the gun to be used at high aeroplane speeds. Details of this cannot be given atthe moment, but we hope to refer to it in detail in a later article. The armament, incidentally, consists of four guns—two Vickers and two Lewis guns. In addition, there is room form, has several Koolhoven having the petrol tanks, in the fuselage for camera or wireless set. Ailerons are fittedto the lower plane only, and run the whole length of the span. Specification.—Wing span, 10-5 m. ; length overall, 8-6 m. ;weight of machine empty, 896 kgs. ; fuel, 386 kgs. ; military load, 286 kgs. ; total loaded weight, 1,568 kg.s. Speed at3,000 m., 260 km./hr. Climb to 5,000 m, in 14 mins. Landing speed, 88-5 km./hr. LEVASSEURTHE firm of Pierre Levasfcur, which is one of the largest contractors of aircraft to the French Navy, will exhibitat the Salon the following machines: (a) "a three-scater shipboard reconnaissance aeroplane, with 450 h.p. Lorraine-Dietrich engine ; (b) a two-seater fighter, with 500 h.p. Hispano-Suiza engine ; (c) a transport aeroplane, with420 h.p. Gnome-Rhone Jupiter engine. The P. Levasseur three-seater naval reconnaissance aeroplane has a detachable undercarriage and a water- tight fuselage. In addition, there will be found on the Levasseur stand wooden and metal propellers of various types, including the Levasseur-Reed duralumin airscrew, for which this firm is sole licensee for France. The Levasseur Shipboard Reconnaissance Aeroplane.—TheLevasscur shipboard reconnaissance aeroplane belongs to the class of naval aircraft which are designated in France underthe term avion marin, which does not mean, as some suppose, a seaplane, but rather a seagoing aeroplane. The avionsmarins of the French Navy are used both for shipboard and coastal service, in the carrying out of which work they mayhave to alight in an emergency on water. For this purpose the lower portion of the fuselage is built in the form of asturdy water-tight hull, fitted with a step ; when the pilot has to alight on water, he merely releases the undercarriageand locks the airscrew in horizontal position ; the machine can then come to rest without any danger of nosing over,and will float indefinitely. Wing-tip floats contribute to the hydrodynamic stability of the machine. The P. Levasseur VI C.2 two-seater fighter with 500 h.p.Hispano Engine. The wings are timber framed and fabric covered, whilethe fuselage is mainly built of plywood over two longi- tudinal main frames, which are joined by a bottom and atop of plywood. This type of construction does away with all wire bracing, and insures absolute water-tightness. Theengine mounting is built of steel tubing. The wings may be folded for stowage on board aircraft carriers. Specification of the Levasseur Shipboard ReconnaissanceAeroplane.—Engine, 450 h.p. Lorraine-Dietrich ; span, 14-60 m. (open), 5-67 m. (folded) ; length, 9-70 m. ; height,3-91 m. ; wing area, 60 sq. m. ; weight, empty, 1,550 kg. ; fuel load, 310 kg. ; useful load, 540 kg. ; weight, loaded,2,400 kg. ; max. speed, sea level, 185 km.p.h. ; speed at 3,000 m. altitude, 175 km.p.h. ; climb to 3,000 m. altitude,20 mins. ; ceiling, 5,500 m. 781
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