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Страна Конструктор Название Год Фото Текст

LWF V

Страна: США

Год: 1916

Kirkham - Racer - 1912 - США<– –>LWF - G - 1918 - США


V


Этот самолет строился первоначально как учебный двухместный биплан для подготовки пилотов и наблюдателей для армейской авиации. Но хорошие летные данные позволили использовать его и как разведчик. В итоге, в армии США он был принят на вооружение как разведчик. На фронт машина не попала, но все-таки ей пришлось повоевать. В 1918-1919 годах некоторое количество самолетов LWF модели V нескольких вариантов поступили на вооружение чехословацкого добровольческого корпуса и армии Колчака. После ликвидации в 1919 году Восточного фронта несколько машин в виде трофеев достались РККА.
  Эта была машина цельнодеревянной конструкции. Фюзеляж выклеивался из фанерного шпона и крепился к деревянному каркасу. Он имел овальное сечение и в хвостовой части сходился на клин. В носовой части устанавливался лобовой радиатор и 8-цилиндровый, V-образный, жидкостного охлаждения мотор. Выхлопные патрубки направлялись вниз фюзеляжа за крыло. Крыло двухлонжеронное, деревянной конструкции с полотняной обшивкой, оборудовалось элеронами только на верхних консолях. Центроплан отсутствовал, и верхнее крыло стыковалось по оси самолета, а нижние консоли крепились к фюзеляжу. Существовали три варианта крыла, различавшихся размахом и хордой. Подкосы и стойки трубчатые, с деревянными обтекателями. Оперение имело конструкцию, аналогичную конструкции крыла. Рули не имели компенсации, изготавливались из труб, дерева и полотна. Шасси обычной конструкции, с каркасом из стальных труб, с деревянными обтекателями, сплошной осью и резиновой шнуровой амортизацией. Двигатели устанавливались различные, разной мощности в зависимости от модификации самолета. Самолеты серии V несли моторы "Томас-Морз 8" (152 л. с.), серия V-1 частично снабжалась двигателями "Стюртеван" 5-А(150л. с.), а серия V-2 - моторами "Холл-Скотт" 165 HP (165л. с.), но в основном на машинах ставился "Томас-Морз 8".
  
  
  Показатель LWF-V Трактор LWF-V-1 LWF-V-3
   1918г. 1918г. 1919г.
  Размеры, м:
   длина 8,53 8,53 8,68
   размах крыльев 14,20/12,80 14,20/12,80 14,20/12,80
  Площадь крыла, м2 45,52 45,52 45,52
  Вес, кг:
   максимальный взлетный 1134 1211 1270
  Двигатель: "Томас-Морз" 8 "Стюреван" 5-А "Томас-Морз" 8
   мощность, л. с. 150 150 150
  Скорость, км/ч 145 145,0 145,0
  Дальность полета, км 500 550 550
  Экипаж, чел. 2 2 2


Jane's All The World Aircraft 1919


An L.W.F. military biplane flew, late in 1917, with a 200 h.p. Sturtevant engine from Rantoul, Illinois, to San Antonio, Texas, a distance of 1.184 miles, in a total flying time of 9 hrs. 15 mins. This included one non-stop stretch of 620 miles.
  The machine carried a U.S. Army Officer and pilot, and made two short stops on route for fuel.
  
Model V, Thomas 135 h.p. motor. Biplane land machine.
  Two seater. Speed : 42.2 to 95.5 m.p.h. Climb: 3,750 ft. in 10 mins.
  Full government load. Wing curve: L.W.F. I.
Model V1. Same as above machine, but equipped with Sturtevant 140 h.p. motor.
Model V2. Very similar to above machines, but different motor installation and radiator on nose of upper wing.
  Hall-Scott 165 h.p. motor. Also many minor differences.
  Highspeed: 102 m.p.h.
Model V3. Similar to Model V1, except that motor is now Sturtevant 200 h.p.
  Speed: 42.2 to 110 m.p.h. Climb: 8,000 ft. in 10 mins. Full government load.
  Made flight from Rantoul, Ill., to San Antonio, Texas.
Model F. New model. Liberty motored.
  (First Liberty motor to fly.)


Журнал Flight


Flight, August 9, 1917.

THE L.W.F. TRACTOR BIPLANE.

  THERE is a double meaning in the mystic denomination "L.W.F." In one case it gives the initial letter of the name of each of the three members of the L.W.F. Engineering Company (of Long Island, N.Y., U.S.A.) - Messrs. Edward G. Lowe, Jr., Chas. F. Willard, the designer of the machine, and Robert G. Fowler, the pioneer exhibition flyer. It is also symbolic of one of the main features of the machine, viz. - the Laminated Wood Fuselage.
  One of the aims of the designer has been to, as far as possible, secure the standardisation of as many parts as possible, and all components are put through rigid tests prior to assembly. As will be seen, the main planes are given a slight backward slope as well as a dihedral angle, in order to give the greatest possible inherent stability without sacrificing the general efficiency of the machine. The amount of sweep-back is 2 ft., and the dihedral angle is 1 degree. The top plane, having a span of 46 ft. 6 ins., is in two, sections, each section being attached to two pairs of inverted V struts mounted on the fuselage. The method of attachment forms the subject of one of our sketches, from which it will be seen that quick assembly and vice versa is greatly facilitated. It may be noted here that this fitting, together with most of the other fittings on the L.W.F. biplane, is a substantial drop forging. The lower plane, which has a span of 38 ft. 8 ins., is also in two sections, and is attached direct to the fuselage. The method of attachment is shown in one of the accompanying sketches.
  This fitting consists of a plate following the curvature of the fuselage, to which it is attached by four bolts. Formed on the plate is a dome-shaped projection on which is formed a lug which receives the fork on the end of the wing-spar. Inside the fuselage is a steel compression tube connecting opposite fittings. Provision is made for the attachment of the bracing cables on both the top and bottom plane fittings.
  The front spar is located 9 ins. from the leading edge and 3 ft. from the rear spar. The leading edge of the wing is covered with two-ply wood on the top, extending to the front spar, in order to maintain the correct curvature. The wings are covered with a strong fabric complying with R.A.F., specifications, laid diagonally with seams double lapped, and sewn to the ribs.
  Two pairs of fabric covered stream-lined struts on each side of the fuselage, separate top and bottom planes. The interplane strut fitting, which is illustrated by one of the accompanying sketches, is of the "ball-bearing" type. The ball is formed on the strut socket, and fits into a cup formed on the wing-plate. The strut can thus be adjusted for varying degrees of stagger, and when once adjusted a pin is driven through the cup and into the ball, thereby locking the whole at that particular angle. One end and the sides of the wing-plate are bent up to form attachments for the bracing cables.
  The ailerons, which are hinged to the rear spar of the top plane, are of the double acting type, having an area of 38 sq. ft. The non-lifting double cambered stabilising plane is in two sections, one mounted by quick detachable fittings to each side of the fuselage. A triangular vertical stabilising surface is mounted on the top of the fuselage forward of the rudder, which, as with the elevators, is constructed of steel tubing. Any standard type of control, such as Farman or Dep. is fitted, or if required, the L.W.F. three-in-one.
  In the fuselage is to be found the most interesting feature of the L.W.F. machine. It is 23 ft. 6 ins. long, 3 ft. 6 ins. deep (maximum) and 2 ft. 7 1/2 ins. wide maximum. It is built up of three plys of wood, between each of which is a layer of silk. One ply of wood runs longitudinally, whilst the other two are laid spirally to the right and left respectively. The whole shell-is then covered with a specially prepared fabric, and, in the case of hydro-aeroplane models, stitched through and through with very fine, strong wire. It is then given a final treatment of waterproof varnishes. The two cockpits are arranged in tandem, comfortably upholstered and fitted with wind screens.
  The landing chassis is of the conventional two-wheel V type, but a three-wheel type, suitable for instruction work, can be fitted if required. A swivelling tail skid is also provided. Provision has been made whereby a complete water-gear may be fitted, consisting of two main floats or pontoons and a small float under the tail.
  The power plant consists of either a 140 h.p. 8-cylinder model 5 Sturtevant, or a 135 h.p. Thomas. In each case the exhaust is led well away from the pilot and passenger. The radiator is mounted in the nose of the fuselage, in front of the engine, and is elliptical in shape

А.Шепс - Самолеты Первой мировой войны. Страны Антанты
Учебный самолет/разведчик LWF-V (1918г.)
Журнал - Flight за 1917 г.
Three-quarter front view of the L.W.F. tractor biplane.
Журнал - Flight за 1917 г.
Three-quarter rear view of the L.W.F. tractor biplane.
Журнал - Flight за 1917 г.
AT THE NEW YORK AERO SHOW. - The L.W.F. tractor biplane.
Журнал - Flight за 1917 г.
Side view of the L.W.F. tractor biplane.
Jane's All The World Aircraft 1919 /Jane's/
L.W.F. Model V 2-seater reconnaissance biplane, with 135 h.p. Thomas motor.
Форум - Breguet's Aircraft Challenge /WWW/
Red army [Красной армий] trophy captured on the Czechs in Siberia. Picture is from about 1920. The machine is an American L-W-F Model 5 (actually Model V). L-W-F stood for Robert G Fowler, Edward Lowe and Charles Willard. Willard was the designer of this machine, which was quite modern when it came out in 1916, featuring a monocoque fuselage.
This machine seems to be heavily modified looking at the large piece sawn out from the upper wing, the modified ailerons and the different engine or engine installation.
The Czechs got 25 machines of this and one has survived. It hangs from the ceiling in the Prague Technical Museum (now restorated, will open somewhere in 2008).
Журнал - Flight за 1917 г.
The laminated wood fuselage of the L.W.F. tractor biplane.
Журнал - Flight за 1918 г.
American aeroplane types of 1917-18: L.W.F. Tractor.
Журнал - Flight за 1917 г.
The mounting of the top plane sections to the cabane on the L.W.F. tractor biplane.
Журнал - Flight за 1917 г.
The attachment of the lower plane to the fuselage of the L.W.F. tractor biplane.
Журнал - Flight за 1917 г.
The L.W.F. Tractor Biplane. - The tail-brace fitting.
Журнал - Flight за 1917 г.
The interplane strut attachment on the L.W.F. tractor biplane.
Журнал - Flight за 1917 г.
AT THE AMERICAN AERO SHOW. - Some constructional details. Various examples of interplane strut fittings, including the early Wright-type.
Журнал - Flight за 1917 г.
THE L.W.F. TRACTOR BIPLANE. - Plan, side and front elevations to scale.