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| I.A. 24 Calquin Bimotor de ataque y bombardeo |
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| FS2004/FSX | |
| JRLucariny FSDS V3.5 Model | |
| Download/DonationWare | |
| Mar/2008 | |
| El prototipo de este avión bimotor de ataque y bombardeo liviano voló por primera vez el 5 de junio de 1946. Inspirado en el De Havilland "Mosquito", debía llevar originalmente iguales motores que éste, es decir, los Rolls-Royce "Merlin" con cilIndros en V, gracias a los cuales esta máquina podría alcanzar una velocidad de 615 km/h. |
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De haberse instalado dichos motores la similitud con el "Mosquito" habría sido notable pero ante la posibilidad de obtenerlos, el Instituto Aerotécnico se vio obligado a instalar los Pratt & Whitney R-1830-G "Twin Wasp" de 1050 Hp y catorce cilindros radiales, que accionaban hélices tripalas metailcas Hamilton Standard Hydrornatic 23-E-50 de paso varlable. Con estos motores sólo se obtuvo una velocidad máxima de 440 km/h el pimer "Calquín' de los 100 construídos realizó su primer vuelo el 4 de Julio de 1947. La primera serie, de 100 unidades, se completó en 1950 y permaneció en servicio hasta 1957, cuando fue retirado de actividad. |
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Monoplano de ala baja cantilever, en su construcción se emplearon principalmente maderas del país. Tanto los alerones como los timones de profundidad y de direccion fueron entelados, con bordes de ataque en madera terciada y disponía de aletas compensadoras en alerones y timones de profundidad. |
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Las patas principales dei tren de aterrizaje se replegaban hacia atrás, alojándose en las barquillas de los motores y estaban equipadas con dos amortiguadores oleoneumáticos cada una, la rueda de cola era también retráctil. La proa y la cabina estaban construidas con material plástico trasparente excepto los parabrisas y los paneles laterales que eran de vidrio inastillable. La tripulacion de dos hombres, se ubicaba en asientos lado a lado. |
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El armamento consistia en cuatro ametralladoras de 12,70 mm. agrupadas en la parte inferor de la proa. Algunas unidades disponían de cuatro ametralladoras de 12.7 mm en lugar de los cañones y una carga interna de bombas de 750 kg. Bajo las alas podían instalarse doce cohetes de 75 milímetros. |
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Las caracteristicas principales eran: envergadura 16.30 m; largo 12 m; alto 3.40 m; superficie alar 38 m2; trocha 5 m; peso vacio 5.340 kg; carga útil 1.860 kg. peso total 7200 kg; peso total maximo 8.164 kg; carga alar 189 Kg/m2; relacion peso-potencia 3.42 kg/HP, velocidad máxima 440 km/h: de crucero 380 km/h; de atrerrizaje 180 km/h sin flaps y 160 km/h con flaps; velocidad ascensional inicial 750 m/min; autonomía 3 hs; alcance 1.140 km; techo de servicio 10.000 metros. Link |
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A native "Mosquito", The IA-24 Traditionally, it has been taken for granted that the “DL” 24 “Calquin” (“Royal Eagle”) is a derivative, a copy or was developed with inspiration drawn from the famous British DH 94 “Mosquito” airplane, and also that the Calquin was originally designed to be equipped with the Rolls Royce Merlin in-line engines, that the British airplane had. This affirmation is not without basis, since in fact, in the National Aeronautical Magazine, Nr. 339 (September-October 1997) issue, researchers Ferretti and Giró presented a detailed report on the Fabrica Militar de Aviones (Military Aircraft Factory – FMA) up to that time, and they make reference to the IAe-24. |
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We hasten to make clear, that the study we refer to, is one of the most complete and better done of all that have been published to date, and its excellence transcends time, while at the same time, it is not deserving of any polemic. The idea is not to continue that study or anything like that. Reading the document - a rich and interesting document, by the way - will be enough to corroborate what has been stated in the first paragraph that is, that the verbal tradition assumes the Argentinean product to be a copy of the British one, and destined to carry the same powerplant. |
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I.A. 24 Calquin JRLucariny Panel Not so much, and not so little. As we will see later, there are elements that could help to conclude that the similarity between both aircraft (aesthetically at least) it is due only to coincidences arising from the styles of that time, due to industrial influences and, why not, even due to “sympathy” for British products. Before entering into that discussion, we will attempt to concisely present the technical features of the airplane, as well as part of its history, and we will also be including some data, in reference with the Fuerza Aerea Argentina’s (FAA) employment of the aircraft, at the beginning of its operational life. |
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The Airplane Twin engine, mid-wig, two-seat, tandem airplane. It was designed primarily for attack missions, although other roles were considered for the basic model. When it comes to the building of the airplane, we must keep in mind the scarcity of materials due to the Second World War. And for this reason, native woods were employed for its construction. |
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Construction techniques that had been successfully employed with the “DL” 22 were employed, and as an example we will mention the wing, built in one section, with a central wing box. Landing gear was retractable and folded backwards to store in the wing section of the engine nacelles and becoming completely enclosed by the integral wheel covers. The “conventional” landing gear arrangement, had a retractable rear wheel, but without having a wheel cover. All three wheels were equipped with pneumatic-oil shock absorbers. |
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Control surfaces were made of fabric-covered wood, their leading edges reinforced with plywood. Two adjustable tabs completed the control surfaces. Crew safety was by the means of armored shatter-proof-glass windshield and side windows, the nose cone was transparent, and the remainder of canopy greenhouse was built of Plexiglas.
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Engines were installed one per semi-wing, on nacelles supported by Cr-Mb steel mounts and covered with a traditional design cowling enclosing the 14 cylinder-double-row engines. The power plants were the Pratt & Whitney R-1830-SCG “Twin Wasp”, producing 1050 HP SAE @ 2300 RPM, driving variable pitch, three-bladed Hamilton Standard Hydromatic E-50 propellers. |
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Performance and Technical data Wingspan: 16.30 mts. Height: 3.40 mts. Length: 12.00 mts. Wing Surface: 38.00 sq. m. Empty Weight: 5,340 Kg. MTOW: 8,164 Kg. |
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