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ÄŒKD-Praga
ČKD-Praga (Českomoravská-Kolben-Daněk Prague) was a Czechoslovakian aircraft manufacturer. The company was founded in 1915 as an engine manufacturing company, under the designation Praga. The company started designing aircraft in 1930–31 when the designers Pavel Beneš and Miroslav Hajn came to ČKD-Praga from Avia. Their first aircraft was the Praga E-39 from 1931. It was a military trainer, with a production run of 139 aircraft. ČKD-Praga developed several aircraft over the following years, but none exceeded prototype stage. Jaroslav Šlechta became chief designer in 1934 and designed the Praga E-114 Air Baby aircraft, which became a commercial success. The aircraft was sold to France, Iran, Romania and to Britain. Most of the British aircraft were manufactured locally in Manchester under a licence, by F. Hills & Sons as the Hillson Praga. 126 aircraft were ordered until 1946. Šlechta remained with Praga post war, designing the E-55 general purpose aircraft. ČKD-Praga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga E-114 Air Baby
The Praga E.114 was a single-engine sport airplane, designed and manufactured by the Czechoslovakian company ÄŒKD-Praga. Due to its light weight it was also called Air Baby. Design and development The Praga E.114, first flown in 1934 and designed by Jaroslav Å lechta, was a high wing, cantilever monoplane seating two in a side-by-side seating, side-by-side cabin. It was an all wood aircraft with a two spar (aviation), spar single piece wing; the spars and ribs were built from pine and plywood and the wing plywood covered. The wing section was reflexed at the trailing edge. The wing had a constant chord centre section with taper on the trailing edge outboard and rounded tips. The ailerons were plywood covered and balanced rudder, unbalanced. Its fuselage was a pine framed, plywood covered hexagonal box, with the straight edged fin an integral part. The rudder was rounded and balanced rudder, horn balanced. Though the rudder was wood framed and covered, the tailplane, mounted j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga BH-39
Praga E-39/BH-39 was a Czechoslovak trainer aircraft. History This aircraft was designed by Pavel Beneš and Miroslav Hajn, engineers at the Czech aviation company ČKD-Praga in 1931. It flew for the first time in June of that year. The biplane, standard configuration for that era, was an immediate success and orders were placed by the Czechoslovak Air Force that used them as elementary training aircraft at its flight schools throughout the 1930s. Pre-World War II production of the machine was 139 units. In 1939 following the German occupation of Bohemia and Moravia, Slovakia became an independent country. It was a German ally and its small air force was placed under Luftwaffe control. Ten of the Praga E-39s were initially used as trainers by the Slovak Air Force. During the German invasion of the Soviet Union they were transferred to the Soviet front where they were employed by the Slovaks as reconnaissance platforms in support of German ground forces. Other E-39s were used by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga E-44
The Praga BH-44 (designated E-44 by the Czechoslovak Air Force) was a prototype Czechoslovak fighter biplane of the early 1930s. Only two were built, the rival Avia B-34 being ordered instead. Design and development In 1932, ČKD-Praga, the aircraft department of the Czechoslovak company Praga, entered a competition to design a new fighter for the Czechoslovak Air Force, with its design, the BH-44, competing against designs from Avia (the B-34Green and Swanborough 1994, p. 36.) and Letov (the Š-231Green and Swanborough 1994, pp. 334–335.). The BH-44 was a single- bay biplane of mixed construction, with wooden wings and a fabric covered, steel-tube fuselage. Powerplant was a single Praga ESV water-cooled V12 engine. The first prototype made its maiden flight on 19 July 1932. Performance was unimpressive, as the engine delivered only instead of the promised . A second prototype (sometimes called the EH-144), fitted with a supercharged Praga ESVK engine, flew in Apri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pavel Beneš
Pavel Beneš (14 June 1894 in Prague - 31 May 1956 in Prague) was a chief designer at ČKD-Praga, one of the largest engineering companies in the former Czechoslovakia and today's Czech Republic. Beneš was first a founder and chief designer at Avia, along with Miroslav Hajn, in 1919. The two began repairing planes in a workshop within the complex of an old sugar factory in Prague. One year later, they designed their first two-seater plane, the Avia BH-1. From 1923 to 1925, the two developed the BH-7, BH-9, and BH-11 monoplanes, launching the era of biplane fighters. The BH-11 won the Coppa d' Italia prize. Three years later, their BH-21 fighter was considered one of the world's best planes. In 1930, Beneš and Hajn came to ČKD-Praga. The first aircraft they designed was the Praga E-39 in 1931. In April 1935, he joined Jaroslav Mráz to form the Beneš-Mráz aircraft factory in Choceň Choceň (; german: Chotzen) is a town in Ústà nad Orlicà District in the Pardubi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miroslav Hajn
Miroslav Hajn (21 September 1894 in Žamberk, Austria-Hungary – 6 September 1963 in Prague, Czechoslovakia) was a chief designer at ÄŒKD-Praga, one of the largest engineering companies in the former Czechoslovakia and today's Czech Republic. Hajn was first a founder and chief designer at Avia, along with Pavel BeneÅ¡, in 1919. The two began repairing planes in a workshop within the complex of an old sugar factory in Prague. One year later, they designed their first two-seater plane, the Avia BH-1. From 1923 to 1925, the two developed the Avia BH-7, BH-9, and BH-11 monoplanes, launching the era of biplane fighters. The BH-11 won the Coppa d' Italia prize. Three years later, their Avia BH-21 fighter was considered one of the world's best planes. In 1930, Hajn and BeneÅ¡ came to ÄŒKD-Praga. The first aircraft they designed was the Praga E-39 Praga E-39/BH-39 was a Czechoslovak trainer aircraft. History This aircraft was designed by Pavel BeneÅ¡ and Miroslav Hajn, engin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga E-39
Praga E-39/BH-39 was a Czechoslovak trainer aircraft. History This aircraft was designed by Pavel Beneš and Miroslav Hajn, engineers at the Czech aviation company ČKD-Praga in 1931. It flew for the first time in June of that year. The biplane, standard configuration for that era, was an immediate success and orders were placed by the Czechoslovak Air Force that used them as elementary training aircraft at its flight schools throughout the 1930s. Pre-World War II production of the machine was 139 units. In 1939 following the German occupation of Bohemia and Moravia, Slovakia became an independent country. It was a German ally and its small air force was placed under Luftwaffe control. Ten of the Praga E-39s were initially used as trainers by the Slovak Air Force. During the German invasion of the Soviet Union they were transferred to the Soviet front where they were employed by the Slovaks as reconnaissance platforms in support of German ground forces. Other E-39s were used by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga E-210
The Praga E-210 was a four-seat, twin-engined touring aircraft built in Czechoslovakia in the late 1930s. It had an unusual pusher configuration . Its tail unit and undercarriage were modified significantly before World War II and after the war a more powerful version designated E-211 was flown. Design and development The Praga E-210 was designed as a four-seat tourer or air-taxi. It seems to have appeared in public for the first time at the Paris Exhibition of late 1936, though it is not known whether it had made its first flight by then. It was a high wing cantilever monoplane, with an enclosed cabin for four ahead of the wing and in 1936 a conventional tailwheel fixed undercarriage and single fin. It was unusual in adopting a pusher configuration, with two engines close to the fuselage driving small propellers. Its layout was thus much like that of the Carden-Baynes Bee, its almost exact contemporary though a much smaller aircraft. The wing of the E-210 was made in a sing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga E-51
The Praga E-51 is a Czechoslovakian reconnaissance aircraft and light bomber built by Praga in the 1930s. Development was halted by the annexation of Czechoslovakia by Germany, after only one prototype had been built. The appearance of the construction is very reminiscent of the contemporary twin engined fighter, the Fokker G.I from Holland. Design and development The unconventional twin-boom airplane project under Jaroslav Å lechta began in 1936 as a response to a Ministry of National Defence specification which called for the design and construction of a new reconnaissance aircraft to operate over combat zones. The short-range reconnaissance three-seater was to be capable of monitoring activity behind enemy lines; the requirement highlighted the importance of good view from the cockpit as well as of placement of the on-board cameras, which were to be able to collect as many shots as possible at as wide an angle as possible in one flyover. The new aircraft was to replace the agi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga E-45
The Praga E-45 was a single-engined, single-seat biplane fighter built in Czechoslovakia in the mid-1930s. It appeared a little too late to compete with the similar Avia B-534 and failed to get a production order. Design and development The Praga E-45 single-seat fighter was designed to compete with the Avia B-534, but flew some 17 months later. Since the two aircraft had very similar performance and the Avia was more heavily armed, it is not surprising that the Avia won a contract for over 400 aircraft and only one E-45 was built. The E-45 was an equal span, single bay biplane with wings of slight stagger and no sweep. They were largely of constant chord, but had marked elliptical tips. The wings were wooden with plywood covering and a final sheath of fabric, the upper wings a single piece, connected to and held above the upper fuselage by a pair of outward sloping N form struts. The lower wings were attached to stubs integral with the lower fuselage. N-form interplane stru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga E-40
The Praga E-40 was a single engine, two seat, biplane basic training aircraft, trainer, built in Czechoslovakia in the mid-1930s. Design and development The E-40, one of several Praga trainer designs, was a Wing configuration#Wing support, single-bay biplane with open, tandem cockpits. The swept wings had twin wooden Spar (aeronautics), spars and a mixture of plywood and aircraft fabric covering, fabric covering. Ailerons were fitted to the lower wing and the upper wing had a cut-out on its trailing edge to enhance visibility from the forward cockpit. The N-form interplane struts were steel and the bay braced with wikt:streamlined, streamlined wires. A pair of vertical N-form struts joined the wing centre section to the upper fuselage. The fixed tail surfaces were wood framed and plywood covered; the tailplane was strut braced from below. Elevator (aircraft), Elevators and rudder were fabric covered over steel frames. The rudder had a trim tab. The fuselage of the E-40 was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga BH-41
The Praga BH-41, later redesignated E-41, was a military advanced trainer aircraft produced in Czechoslovakia during the 1930s.Taylor 1989, p.751''The Illustrated Encyclopedia of Aircraft'' p.2777 Design and development Designed in response to a Defence Ministry competition and based on the BH-39, it was a conventional biplane design with unstaggered two-bay wings of equal span. The pilot and instructor sat in open cockpits in tandem, and the fixed tailskid undercarriage featured divided main units. The powerplant had been specified by the government to be the Hispano-Suiza 8Fb which were then being manufactured under licence by Å koda. The E-41 was selected as the winner of the competition, and a contract for 43 aircraft was signed. Praga also produced a version powered by a ZOD 260 radial diesel engine, designated the E-141. This was not a success and only a single prototype was built. In 1936, a BH-41 was fitted with a Walter Pollux II engine, and designated the E-241. Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praga E
Praga is a district of Warsaw, Poland. It is on the east bank of the river Vistula. First mentioned in 1432, until 1791 it formed a separate town with its own city charter. History The historical Praga was a small settlement located at the eastern bank of the Vistula river, directly opposite the towns of Old Warsaw and Mariensztat, both being parts of Warsaw now. First mentioned in 1432, it derived its name from the Polish verb ''prażyć'', meaning ''to burn'' or ''to roast'', as it occupied a forested area that was burnt out to make place for the village. Separated from Warsaw by a wide river, it developed independently of the nearby city, and on 10 February 1648 king Władysław IV of Poland granted Praga with a city charter. However, as it was mostly a suburb and most buildings were wooden, the town was repeatedly destroyed by fires, floods and foreign armies. Currently the only surviving historical monument from that epoch is the Church of Our Lady of Loreto. Altho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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