Bellanca 77 Bomber
Страна: США
Год: 1934

Трех-четырехместный бомбардировщик или транспортный гидросамолет
Bellanca Model 77 Bomber
Flight, February 1935

Bellanca Model 77 Bomber

Внимательно изучив успешный опыт разработки и продвижения самолета Model 66 Aircruiser, специалисты компании "Bellanca" решили использовать аналогичную схему и при проектировании военного самолета, предназначенного для поставки на экспорт.
  Model 77-140 поднялся в небо в 1933 году, он был спроектирован на базе Aircruiser. Обозначение самолета указывает, что площадь крыла составляет 770 квадратных футов (71,53 м-'), а мощность силовой установки - порядка 1400 л.с. (1044 кВт). Фюзеляж имел в основном прямоугольное сечение и изготавливался из металла с обшивкой из легких сплавов и полотна. Стандартное обтекаемое колесное шасси могло, по желанию заказчика, меняться на поплавковое - в этом случае Model 77-140 превращался в гидросамолет, торпедоносец-бомбардировщик. Экипаж машины составлял три-четыре человека, самолет мог брать на борт до 15 пассажиров или груз.
  Два самолета были поставлены в Колумбию, для использования с наземных и гидроаэродромов.
  Model 77-320 Bomber являлся модификацией базового самолета и отличался силовой установкой повышенной мощности в составе двух двигателей Wright R-2600. Два таких самолета были также проданы в Колумбию.


  Bellanca Model 77-320 Bomber

  Тип: трех-четырехместный бомбардировщик или транспортный гидросамолет
  Силовая установка: два звездообразных поршневых двигателя Wright R-2600 Cyclone 14 мощностью по 1600 л. с. (1193 кВт)
  Характеристики: макс, скорость на высоте 1830 м - 362 км/час; крейсерская скорость на оптимальной высоте 322 км/час; практический потолок 8535 м; дальность 1448 км
  Масса: пустого 5216 кг; максимальная взлетная 8936 кг
  Размеры: размах крыла 23.16 м; длина 13,79 м; высота 6,25 м; площадь крыла 71,53 м
  Вооружение: пять 7,62-мм подвижных пулеметов Browning (носовой, надфюзеляжный, подфюзеляжный "туннельный" и два бортовых), а также до 1293 кг вооружения на внешней подвеске (одна торпеда или бомбы)

Flight, February 1935

A 190 m.p. h. Bellanca Bomber Adaptable for Several Purposes: Landplane or Seaplane

  LARGER than any previous model produced by this well-known American firm, the new Bellanca bomber retains numerous distinctive "family" features. It is apparent that the experience gained with the "Airbus" and "Aircruiser" types has been applied to the design, which embodies a high wing with bracing struts forming auxiliary aerofoils, their inner portions, from the undercarriage attachment to the fuselage, being placed at a pronounced anhedral angle. Four of the new machines, which may be operated as landplanes or on floats, have been built for the Colombian Government and on their delivery flight may attempt to break distance records for seaplanes. An eighteen-passenger civil version, the most attractive feature of which is its 6,210 lb. Disposable load, will soon be put on the market.
  The folding fabric-covered wings are of wooden two-spar construction, with closely spaced plywood ribs. Both the "auxiliary" wings and the lower stub wings are of welded steel tubes with fabric covering, and the inner portions of the main planes are covered with aluminium alloy. Chrome molybdenum steel tubing is employed for the fabric-covered fuselage. In the nose there is a gunner's position, and aft of this is the pilot's cockpit with dual controls. An anchor winch is one of the numerous items provided. A position for the bomb aimer is incorporated to the side of, and just below, the pilot's compartment and is well provided with Pyralin windows. There are two gunner's positions behind the wings.
  The cabin is 13ft. long and 6ft. high, and is adaptable to several purposes. Six stretchers may be installed or provision may be made for carrying eighteen soldiers, cargo, spare engines, or bombs. Behind the cabin is a 180-gallon abdominal tank, which, in combination with a removable 200-gallon tank strapped to the cabin floor, and the 300 gallons normally carried in tanks in the upper stub wings and engine nacelles, gives a 1,500-mile range in "maximum overload" condition.
  The design and arrangement of the tail surfaces, which are of wood or welded steel tubular construction, is such as to provide easy operation on a single engine without manoeuvring the machine into awkward positions to maintain flight.
  Two direct-drive supercharged Wright "Cyclone F-3" nine-cylinder radials giving 710 h.p. at 7,000 feet are installed in N.A.C.A. cowlings and are attached to rubber-bushed chrome molybdenum mountings on the top wings.
  Exceptional aerodynamic efficiency is a feature of the seaplane version, for the floats, which are of all-metal riveted aluminium alloy construction with retractile water rudders and beaching gear attachments, are simply and neatly attached to the same points as are the wheels of the landplane. Even as a seaplane the machine will fly on one engine with full load, maintaining a height of 8,000 feet.

Two WRIGHT "CYCLONE F-3" (710 H.P. AT 7.000 FT.)

  Span 70ft. (23,16 m)
  Length 40ft. (12,79 m)
  Height 14ft. (4,26 m)

Weight empty 8,216 lb. (3 726 kg)
Normal weight loaded 14,186 lb. (6 411 kg)
Maximum weight loaded 16,333 lb. (7 407 kg)

  Maximum speed a t 7,000ft. 100 m.p.h.
  Cruising speed (75 per cent, full power) 172 m.p.h.
  Stalling speed (with flaps) 58 m.p.h. (93,3 km/h)
  Climb to 6,560 ft. (2,000 m) 5.5 min.
  Climb to 16,400ft. (6.000 m) 17.7 min.
  Absolute ceiling 25,000ft. (7 620 m)
  Normal range 710 miles (1143 km)
  Maximum range 1 500 miles (2 414 km)
The Bellanca Twin-engined Bomber (two 715 h.p. Wright "Cyclone" engines).
There is a very distinct resemblance shown by the Bellanca bomber to some of the commercial "heavy-weights" produced by the company.
EXTRAORDINARY: Apparently a development of the "Aircruiser," this latest Bellanca product is a bomber built for the Colombian Government. The all-up weight is 15,000 lb. and the top speed, on the power of two 750 h.p. engines driving adjustable pitch airscrews, is 190 m.p.h. The machine may be fitted with floats and be used as an ambulance.
Колумбийские летчики, как сообщалось, несколько побаивались летать на четырех поставленных в страну самолетах семейства Model 77.
Three of the four float-equipped Bellanca 77-140 bombers that reached Colombia after the Leticia conflict and remained in service until 1942.
Stressed - skin monocoques have not put the fabric-covered welded structure entirely "out of business." Note, in this view of the Bellanca's cabin, the long-range tank strapped to the floor.
AN OUTSIZE IN AMPHIBIANS: Powered with two geared "Cyclones" of 715 h.p., this big Bellanca amphibian carries eighteen passenger at cruising speed of about 170 m.p.h. There is over fifty cubic feet of baggage space in the stub wings. The machine is a development of the Bellanca bomber, described in Flight, of February, 8 this year.
Bombs are carried partially buried in the lower wing "stubs" and in the fuselage. The great depth of the fuselage and the disposition of the guns are noteworthy.