Avia BH-9, BH-10, BH-11 и BH-12

Подкосный туристский и спортивный низкоплан Avia BH-9 разработан на базе модели BH-5. На самолете был установлен двигатель Walter NZ мощностью 60 л.с. Прототип BH-5 поднялся в небо в 1923 году. Интерес к аппарату проявили чешские военные, которые заказали ДальшеMore>>> партию из 10 машин для использования в качестве связных и учебных. Самолет получил военное обозначение В.9.
   BH-10 стал одноместной пилотажной модификацией самолета BH-9, первый экземпляр был построен в 1924 году, а всего собрали не менее 20 самолетов, в том числе 10 для ВС Чехословакии. Двухместный BH-11, построенный в 1923 году, был очень похож на BH-9. Вооруженные силы Чехословакии получили 15 самолетов BH-11 под обозначением В.11.
   В 1929 году появился BH-11B Antelope - спортивный вариант гражданского назначения. BH-11B строился ограниченной серией и был крупнее и тяжелее, чем BH-11. BH-11C имел тот же мотор, что и BH-11, но крыло большего размаха.
   BH-12 - еще один двухместный вариант самолета BH-9, от более ранних машин его отличал иной профиль крыла. Самолет был собран в 1924 году для удовлетворения потребности в спортивном самолете со складным крылом (консоли крыла поворачивались на шарнирах и складывались вдоль фюзеляжа). Со сложенным крылом самолет транспортировался на прицепе за автомобилем.


ТАКТИКО-ТЕХНИЧЕСКИЕ ХАРАКТЕРИСТИКИ


   Avia BH-9

   Тип: двухместный спортивный и учебный самолет
   Силовая установка: один звездообразный мотор Walter NZ мощностью 60 л. с. (45 кВт)
   Характеристики: максимальная скорость на оптимальной высоте 158 км/ч; крейсерская скорость 125 км/ч; практический потолок 4500 м; дальность полета 470 км
   Масса: пустого 345 кг; максимальная взлетная 550 кг
   Размеры: размах крыла 9,72 м; длина 6,64 м; высота 2,53 м; площадь крыла 13,60 м2

Flight, June 1924

THE THIRD INTERNATIONAL AERO SHOW AT PRAGUE
CZECHO-SLOVAKIA

Milos Bondy a Spol

   THIS firm, better known as "Avia," has an imposing exhibit, including no less than 11 machines, all of which are designated B.H. followed by a series number.
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   Two examples of the "Avia" B.H. 9 are exhibited This machine is a two-seater intended for school work or sporting flying. The engine is one of the five-cylinder radial air-cooled Walters. The machine is said to be very stable, but can, at the same time, be stunted to a considerable extent. Dual controls are provided, and the pupil, when the machine is being used for school work, occupies the front seat. The main dimensions of the B.H. 9 are :- Length o.a., 22 ft. 1 in.; span, 32 ft. 3 ins.; wing area, 146 sq. ft. The weight of the machine empty is 760 lbs., the useful load 460 lbs., and the total loaded weight is 1,220 lbs. The speed near the ground is 99 m.p.h., and the machine climbs to 2,000 m. (6,560 ft.) in 12 minutes. The ceiling is about 13,000 ft.
   A very similar but somewhat smaller machine, the B.H.10, is also exhibited. This is to all intents and purposes a smaller "sister" of the B.H.9. Its overall dimensions are smaller, it is a little faster, and is capable of all manner of stunts. In fact, the B.H.10 is used extensively in the Czech flying service for teaching stunt flying. Like the B.H.9, the B.H.10 is fitted with 60 h.p. Walter engine. Its dimensions are: length overall, 18 ft. 2 ins.; span, 29 ft. 4 ins.; wing area, 105 sq. ft. The weight of the machine empty is 637 lbs. and the useful load is 278 lbs., bringing the total loaded weight up to 915 lbs. The maximum speed near the ground is 102 m.p.h., and the machine climbs to 2,000 m. in 10 minutes. The ceiling is 15,000 ft.
   The B.H.11 is a slight modification of the B.H.9, and is used as a messenger 'plane in the Czecho-Slovak army. The main alteration is in the petrol tanks, which are somewhat larger and contain sufficient fuel for 4 1/4 hours' flying. The dimensions are the same as those of the B.H.9, and the performance is very nearly the same. It may be mentioned that recently a Czechoslovak record for duration and distance was established with the B.H.9 by Mr. Lhota, who covered six laps of 200 kms. each, or a total distance of 747 miles, in 9 hrs. 46 mins. The machine carried 230 litres of petrol in a large tank placed in the cockpit normally occupied by the passenger.
   The B.H.12 is the most recent modification of the B.H.9, which it resembles in general lines and in dimensions. The structure has, however, been re-designed so as to give the lowest possible weight, and the machine is intended for this year's Brussels competitions for touring machines. An innovation is the folding wings of this machine. For transport the struts are disconnected, when the two wing halves swing around the front spar fitting and lie flat against the sides of the fuselage. Owing to the reduced weight the performance is slightly better than that of the standard B.H. 9.
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Flight, December 1926

The Paris Aero Show 1926

MILOS BONDY A SPOL

   THIS well-known Czecholovak firm is exhibiting two aeroplanes, the little Avia B.H.11 with Walter engine, and a two-seater fighter, the Avia B.H.26.

   The Avia B.H.11 is already well known to our readers, and a detailed description is not, therefore, required. The machine is used extensively in the Czecho-Slovakian Army for training purposes. The engine is a 60 h.p. Walter radial air-cooled. Following are the main particulars and performances of the Avia B.H.11 :- Wing span, 9-72 m.; length overall, 6-64 m.; wing area, 13-6 sq. m.; weight of machine empty, 352 kg.; useful load, 228 kg.; total loaded weight, 580 kg. Top speed, 160 km./hr.; low speed, 75 km./hr.; landing speed, 65 km./hr. Climb to 2,000 in. in 12 mins. Ceiling, 4,000 m.
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Flight, November 1928

BERLIN AERO SHOW 1928

The Czech Light 'Planes

   Of the two machines exhibited by the Avia firm of Prague, one was the familiar type B.H.11, a low-wing strut-braced two-seater monoplane with 60 h.p. Walter radial air-cooled engine. This machine has been in production for a number of years, and is already well known to our readers. It is mainly of wood construction, and simplicity is the keynote of its design. The main dimensions are: Length o.a., 6-64 m. (22 ft.); wing span, 9-8 m. (32-1 ft.); width folded, 2-9 m. (9-5 ft.); height, 2-6 m. (8-5 ft.).
   The weight empty is 360 kg. (792 lbs.), and the normal load consists of pilot and passenger 160 kg. (352 lbs.); petrol, 60 kg. (132 lbs); oil, 6 kg. (13-2 lbs). Normal loaded weight, 586 kg. (1,289-2 lbs.). If it is desired to use the machine for longer distances, the fuel and oil can be increased to 80 kg. (176 lbs.), and 10 kg. (22 lbs.) respectively, while luggage, etc., to the weight of 24 kg. (53 lbs.) can be carried, bringing the total loaded weight up to 634 kg. (1,400 lbs.). The machine is stressed for airworthiness (aerobatics) up to 670 kg. (1,475 lbs.), and for normal flying up to 860 kg. (1,890 lbs.). The following performance figures relate to normal weight, i.e., 586 kg. (1,290 lbs.); maximum speed, 160 km./h. (100 m.p.h.); cruising speed, 135 km./h. (84 m.p.h.); landing speed, 65 km. h. (40 m.p.h.). Climb to 2,000 m. (6,560 ft.) in 15 minutes. Ceiling, 3,000 m. (9,850 ft).
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