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
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.
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
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.
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.
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.
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).
The "Avia" B.H.9. two-seater sporting machine, fitted with 60 h.p. Walter radial engine.
GENERAL VIEW FROM THE THIRD INTERNATIONAL AERO EXHIBITION AT PRAGUE: The "Avia" B.H.9.
Prague - Croydon - Prague: Lieut. Jira, of Czechoslovakia, who recently flew from Prague to Croydon and back on an Avia B.H. 9 low-wing monoplane, 60 h.p. Walter engine. Although he did not succeed, owing to bad weather, in making non-stop flights as intended, he nevertheless put up a remarkable performance, covering the 2,525 km. (1,565 miles) at an average speed of 140 k.p.h. (86 9m.p.h.)
Dr. Lhota standing by the Walter engine of his B.H.9 monoplane, on which he flew from Prague to Rome and back.
PRAGUE - ROME - PRAGUE: Dr. Lhota, the well-known Czech pilot, recently flew from Prague to Rome and back in this Avia B.H.9 fitted with 60 h.p. Walter engine.
PRAGUE - PARIS - PRAGUE IN A LIGHT 'PLANE: Lieut. Jira, the well-known Czecho-Slovakian pilot, and the Avia B.H.9 (60 h.p. Walter engine), on which he flew from Prague to Paris and back non-stop on August 31 - a distance of 1,180 miles in 13 hrs. 43 mins.
CZECHOSLOVAKIA ATTACKS WORLD'S LIGHT PLANE RECORDS: (3) The Avia B.H.9 two-seater (60 h.p. Walter) on which (4) Capt. Vlcek and Lieut. Chrastina also established a record, on the same day, for the two-seater class, with 1305-546 km. (809-5 miles).
The "Avia" B.H.10 single-seater 60 h.p. Walter engine.
На фюзеляже за кабиной у BH-10 - пилотажной модификации самолета BH-9 - был установлен характерный противокапотажный пилон.
THE THIRD PRAGUE AVIATION MEETING: One of three successful competing machines. One of the Avia B.H.10 monoplanes (60 h.p. Walter) which took part in the Sport 'plane race.
The Avia B.H.11, fitted with a 60-h.p. Walter engine, which was placed first in the Coppa d'Italia, which took place in Rome, November 12-19.
1,530 miles in an Avia light 'plane: Mr. Lhota and the Avia B.H.11 monoplane (60 h.p. Walter engine) - a Czechoslovakian combination - on which he flew about 1,530 miles from Bucharest to Prague, with a passenger, in 18 hrs. 20 mins. flying time.
THE AVIA B.H.11, with Walter engine, is the winner of a number of competitions, most recently that for the "Coppa d'Italia."
CZECHOSLOVAKIAN RECORD: This is Maj. Vicherek, the Czechoslovakian test pilot, who set up the record of 20 hours' continuous flying on the low-winged monoplane Avia BH 11 (Walter 60 h.p. engine).
THE WINNERS OF THE FRENCH LIGHT 'PLANE COMPETITION: In the centre the Czechoslovak Team, from left to right: Fous, works manager; Pacak, Volejnik and Horak, mechanics; Fritsch, chief pilot; Pavel Benes, chief designer; Capt. J. Jira, military pilot (not in the competition); Mrs. Lhota, Dr. Lhota and Milos Bondy, managing director. In the upper right-hand corner, Dr. Lhota is seen in the landing test, while the other two photographs show the Avias in different attitudes of flight.
PETROL TEST AT THE ORLY MEETING: (2) The French Caudron 193 low-wing monoplane and the Avia Antelope (Walter)
THE FOLDING TEST AT ORLY: (1) Avia Antelope (Walter engine) with German B.F.W. in the rear
The "Avia B.H.11," with 60 h.p. Walter engine is a two-seater light 'plane with many victories to its credit, most recently that of the "Coppa d'Italia."
THE FRENCH LIGHT 'PLANE COMPETITION AT ORLY: The eight competing machines: 3. No. 5, Avia B.H.11 (pilot, Dr. Lhota).
THE FRENCH LIGHT 'PLANE COMPETITION AT ORLY: The eight competing machines: 2. No. 4, Avia B.H.11 (pilot, M. Fritsch).
WINNERS OF THE 1926 "COPPA D'ITALIA," AND PERMANENT HOLDERS OF THE CUP: On the left the "Avia" B.H.11, with 60 h.p. Walter engine, on which Bican won this year's competition. The group on the right includes Bican, pilot of the machine, Kinsky, his passenger, and Kopexky, Secretary of the Aero Club of Czechoslovakia.
Очень похожий на BH-9, самолет BH-11 развивал максимальную скорость 176 км/ч и обладал дальностью полета 700 км.
CZECHOSLOVAKIA ATTACKS WORLD'S LIGHT PLANE RECORDS: (1) Capt. Cerny who accomplished a flight, on December 8, over a closed circuit covering a total of 1740 728 km. (1,080 miles), thus creating a record for single seaters. (2) Capt. Cerny's Avia B.H.11 single-seater monoplane, with 60 h.p. Walter engine.
THE "AVIA" B.H.12. Three-quarter rear view.
The "Avia" B.H.12, with 60 h.p. Walter engine, has been specially built for the Brussels competition. Three-quarter front view.
THE AVIA B.H.12 WITH WINGS FOLDED. The wings pivot around the front spar, and are then secured to the fuselage, when the machine can be trailed behind a car or motor bicycle, or even wheeled along by hand, as show in the photograph.
The "Avia" B.H. 16 is a light 'plane single-seater, and will be fitted with a Blackburne engine. The engine shown in this photograph is a Vaslin.
Sqdr.-Ldr. A. Kubita in his Avia monoplane, which he flew to Lympne for the air meeting. He is the Czechoslovakian Air Attache in England.
The manner of mounting the balanced elevator and rudder on most of the "Avia" machines. The small fixed tail plane is rigidly built into the tail portion of the fuselage.
Undercarriage of the B.H.16 light 'plane. The springing is provided by rubber blocks in compression.
A typical "Avia" strut fitting. The sketch was actually made from the type B.H.12.