Lublin R-XII
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Lublin R-XII
The Lublin R-XII was the Polish three-seat sports and touring aircraft, designed in 1930 in the Plage i Laśkiewicz factory in Lublin, that remained a prototype. Design and development Plage i Laśkiewicz works was among factories, that developed sports aircraft for an order of the LOPP paramilitary organization. Its design, the Lublin R-XII, was basically a scaled down passenger aircraft Lublin R-XI. The main designer was Jerzy Rudlicki. The only prototype was flown in autumn 1930 (registration SP-AFB). It was not built in series. The aircraft was not successful and its performance was not satisfactory because of too much weight. It did not take part in the 3rd Polish Light Aircraft contest because of a weight limit. It was owned by the factory and little used, after a few years it was scrapped. The R-XII was the only sports aircraft of Plage i Laśkiewicz. Description A mixed construction cantilever high-wing monoplane, single-engine, conventional in layout. It had a steel frame ...
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Plage I Laśkiewicz
Plage i Laśkiewicz (Plage & Laśkiewicz) was the first Polish aerospace manufacturer, located in Lublin and manufacturing aircraft under Lublin name. Full name was: ''Zakłady Mechaniczne E. Plage i T. Laśkiewicz'' – Mechanical Works E. Plage & T. Laśkiewicz. The factory produced aircraft between 1920 and 1935, when it was nationalized as the LWS. History Beginnings and license production The company was founded in 1860 as Fabrykę Wyrobów Miedziowych, a mechanical workshop specializing in the manufacture of copper products. However, by 1919 it had been renamed Plage i Laśkiewicz and that year it started producing aircraft. On February 17, 1920, the Polish government ordered a licence production of Italian fighters Ansaldo A.1 Balilla and light bombers Ansaldo A.300 in Plage & Laśkiewicz. The first Polish A.300 was flown on June 14, 1921. However, due to lack of experience, a quality of produced aircraft was low, and there were numerous crashes. As a result, the orde ...
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Armstrong-Siddeley Genet
The Armstrong Siddeley Genet was a five-cylinder, air-cooled, radial engine for aircraft use built in the UK, first run in 1926. It developed 80 hp at 2,200 rpm in its final form and was a popular light aircraft powerplant. Following the company tradition with a slight deviation the engine was named after the Genet, a catlike animal of the same order but different family. Variants and applications Genet I Genet I producing 65 hp. * Avro 618 Ten * Avro Avian prototype * Blackburn Bluebird I * BFW M.23 * Cierva autogyros. C.9 and C.10 * Drzewiecki JD-2 * Fleet Fawn * Junkers A50 Junior * Medwecki and Nowakowski M.N.5 * Saro Cutty Sark * Southern Martlet * Westland-Hill Pterodactyl Genet II The Genet II produced 80 hp due to an increased compression ratio of 5.25:1. * ANEC IV * Avro Avian * Blackburn Bluebird II * Cierva C.19 autogyro * Darmstadt D-18 * de Havilland DH.60 Moth * Fairchild 21 * Klemm Kl 25 * Nicholas-Beazley NB-8G * Parnall Imp * R ...
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High-wing Aircraft
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplane (aeronautics), multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing configuration and is the simplest to build. However, during the early years of flight, these advantages were offset by its greater weight and lower manoeuvrability, making it relatively rare until the 1930s. Since then, the monoplane has been the most common form for a fixed-wing aircraft. Characteristics Support and weight The inherent efficiency of the monoplane is best achieved in the cantilever wing, which carries all structural forces internally. However, to fly at practical speeds the wing must be made thin, which requires a heavy structure to make it strong and stiff enough. External Bracing (aeronautics), bracing can be used to improve structural efficiency, reducing weight and cost. For a wing of a given size, ...
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Lublin Aircraft
Lublin is the ninth-largest city in Poland and the second-largest city of historical Lesser Poland. It is the capital and the center of Lublin Voivodeship with a population of 336,339 (December 2021). Lublin is the largest Polish city east of the Vistula River and is about to the southeast of Warsaw by road. One of the events that greatly contributed to the city's development was the Polish-Lithuanian Union of Krewo in 1385. Lublin thrived as a centre of trade and commerce due to its strategic location on the route between Vilnius and Kraków; the inhabitants had the privilege of free trade in the Grand Duchy of Lithuania. The Lublin Parliament session of 1569 led to the creation of a real union between the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania, thus creating the Polish–Lithuanian Commonwealth. Lublin witnessed the early stages of Reformation in the 16th century. A Calvinist congregation was founded and groups of radical Arians appeared in the city, ...
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1930s Polish Sport Aircraft
Year 193 ( CXCIII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Sosius and Ericius (or, less frequently, year 946 ''Ab urbe condita''). The denomination 193 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * January 1 – Year of the Five Emperors: The Roman Senate chooses Publius Helvius Pertinax, against his will, to succeed the late Commodus as Emperor. Pertinax is forced to reorganize the handling of finances, which were wrecked under Commodus, to reestablish discipline in the Roman army, and to suspend the food programs established by Trajan, provoking the ire of the Praetorian Guard. * March 28 – Pertinax is assassinated by members of the Praetorian Guard, who storm the imperial palace. The Empire is auctioned off ...
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Potez 36
The Potez 36 was a French two-seat touring or sport monoplane designed and built by Potez. The Potez 36 was a high-wing braced monoplane with a conventional landing gear. It had an enclosed cabin with side-by-side seating for a pilot and passenger. The design had some unusual features like folding wings to make it easier to store or to tow behind a motor car. Some of the aircraft had Potez-designed leading-edge slats. The aircraft was popular with both French private owners and flying clubs with a small number being used by the French Air Force during the 1930s as liaison aircraft. Variants ;Potez 36 :Prototype of the series powered by a Salmson 5Ac radial engine. ;Potez36/1 :production version powered by a Renault 4Pa; two built. ;Potez 36/3 :Prototype followed by six production aircraft with no slats, powered by a Salmson 5Ac radial engine. ;Potez 36/5 :Variant with no slats but powered by a Salmson 7Ac engine; five built. ;Potez 36/13 :Production version of the 36/5 bu ...
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Armstrong Siddeley Genet
The Armstrong Siddeley Genet was a five-cylinder, air-cooled, radial engine for aircraft use built in the UK, first run in 1926. It developed 80 hp at 2,200 rpm in its final form and was a popular light aircraft powerplant. Following the company tradition with a slight deviation the engine was named after the Genet, a catlike animal of the same order but different family. Variants and applications Genet I Genet I producing 65 hp. * Avro 618 Ten * Avro Avian prototype * Blackburn Bluebird I * BFW M.23 * Cierva autogyros. C.9 and C.10 * Drzewiecki JD-2 * Fleet Fawn * Junkers A50 Junior * Medwecki and Nowakowski M.N.5 * Saro Cutty Sark * Southern Martlet * Westland-Hill Pterodactyl Genet II The Genet II produced 80 hp due to an increased compression ratio of 5.25:1. * ANEC IV * Avro Avian * Blackburn Bluebird II * Cierva C.19 autogyro * Darmstadt D-18 * de Havilland DH.60 Moth * Fairchild 21 * Klemm Kl 25 * Nicholas-Beazley NB-8G * Parnall Imp * ...
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Landing Gear
Landing gear is the undercarriage of an aircraft or spacecraft that is used for takeoff or landing. For aircraft it is generally needed for both. It was also formerly called ''alighting gear'' by some manufacturers, such as the Glenn L. Martin Company. For aircraft, Stinton makes the terminology distinction ''undercarriage (British) = landing gear (US)''. For aircraft, the landing gear supports the craft when it is not flying, allowing it to take off, land, and taxi without damage. Wheeled landing gear is the most common, with skis or floats needed to operate from snow/ice/water and skids for vertical operation on land. Faster aircraft have retractable undercarriages, which fold away during flight to reduce drag. Some unusual landing gear have been evaluated experimentally. These include: no landing gear (to save weight), made possible by operating from a catapult cradle and flexible landing deck: air cushion (to enable operation over a wide range of ground obstacles and wat ...
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Poland
Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous member state of the European Union. Warsaw is the nation's capital and largest metropolis. Other major cities include Kraków, Wrocław, Łódź, Poznań, Gdańsk, and Szczecin. Poland has a temperate transitional climate and its territory traverses the Central European Plain, extending from Baltic Sea in the north to Sudeten and Carpathian Mountains in the south. The longest Polish river is the Vistula, and Poland's highest point is Mount Rysy, situated in the Tatra mountain range of the Carpathians. The country is bordered by Lithuania and Russia to the northeast, Belarus and Ukraine to the east, Slovakia and the Czech Republic to the south, and Germany to the west. It also shares maritime boundaries with Denmark and Sweden. ...
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Empennage
The empennage ( or ), also known as the tail or tail assembly, is a structure at the rear of an aircraft that provides stability during flight, in a way similar to the feathers on an arrow.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', p. 194. Aviation Supplies & Academics, 1997. Aviation Publishers Co. Limited, ''From the Ground Up'', p. 10 (27th revised edition) The term derives from the French language verb ''empenner'' which means " to feather an arrow". Most aircraft feature an empennage incorporating vertical and horizontal stabilising surfaces which stabilise the flight dynamics of yaw and pitch, as well as housing control surfaces. In spite of effective control surfaces, many early aircraft that lacked a stabilising empennage were virtually unflyable. Even so-called "tailless aircraft" usually have a tail fin (usually a vertical stabiliser). Heavier-than-air aircraft without any kind of empennage (such as the Northrop B-2) are rare, and generally use ...
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Monoplane
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing configuration and is the simplest to build. However, during the early years of flight, these advantages were offset by its greater weight and lower manoeuvrability, making it relatively rare until the 1930s. Since then, the monoplane has been the most common form for a fixed-wing aircraft. Characteristics Support and weight The inherent efficiency of the monoplane is best achieved in the cantilever wing, which carries all structural forces internally. However, to fly at practical speeds the wing must be made thin, which requires a heavy structure to make it strong and stiff enough. External bracing can be used to improve structural efficiency, reducing weight and cost. For a wing of a given size, the weight reduction allows it to fly slower a ...
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