The Ilyushin Il-46 was a jet-engined bomber produced in the USSR during 1951-2, as the result of a directive to redesign the Il-42 project (half the drawings had already been completed). The revised specification was for an aircraft with twice the range and 1 1/2 times the bomb load, with a prototype ready to be submitted for state acceptance trials in July 1952. The Ilyushin design bureau set about designing two versions of the same aircraft, the straight-wing (Il-46) and the swept-wing (Il-46S), with as much as possible common to both aircraft. To meet the schedule for state acceptance trials Ilyushin built only the straight-wing version, fearing that the design, manufacture and flying characteristics of the swept-wing aircraft might cause delays.
The airframe, constructed of aluminium alloy with steel used in highly stressed parts, resembled a large Il-28, the long fuselage having swept tail surfaces, and a similar arrangement of cockpits for the crew of pilot, navigator and rear gunner. The wing, which had moderate taper but straight leading edges, copied the layout of the Il-28, being mounted in the shoulder position at the midpoint of the fuselage. The flying controls consisted of the usual ailerons, elevators and rudder, all fitted with trim tabs for reducing loads on the pilots controls during flight in steady states, as well as "reversible" hydraulically-powered actuators.[1]
Two Lyul'ka AL-5 engines were fitted in long nacelles forward of the wings, exhausting through long jetpipes at the rear of the nacelles, aft of the wing trailing edge. The engines were mounted in this fashion to make room for the retracted main undercarriage legs, two on each side attached to the engine nacelles under the wings. The paired main undercarriage legs, side by side, retracted in opposite directions, inboard forwards and outboard rearwards, with the single mainwheels rotating 90 degrees to lie flat under the long jetpipes of the AL-5 engines. To boost takeoff performance, two JATO bottles could be attached to the rear fuselage. Performance was also improved when Lyulka AL-5F (forseerovannyy - afterburning) engines were fitted.[1]
Flight tests and state acceptance trials were successful, with the Il-46 meeting all requirements. Production was not ordered because the Tupolev Tu-88 proved to have better performance, and was ordered into production as the Tu-16.[1]
The Il-46S swept-wing version was designed concurrently, but construction was not started, to ensure that resources were not diverted from the Il-46.[1]
. Russian Aviation Museum. Archived from the original on 2007-09-13. Retrieved 2008-11-04.
April 13, 2024
ilyushin, engined, bomber, produced, ussr, during, 1951, result, directive, redesign, project, half, drawings, already, been, completed, revised, specification, aircraft, with, twice, range, times, bomb, load, with, prototype, ready, submitted, state, acceptan. The Ilyushin Il 46 was a jet engined bomber produced in the USSR during 1951 2 as the result of a directive to redesign the Il 42 project half the drawings had already been completed The revised specification was for an aircraft with twice the range and 1 1 2 times the bomb load with a prototype ready to be submitted for state acceptance trials in July 1952 The Ilyushin design bureau set about designing two versions of the same aircraft the straight wing Il 46 and the swept wing Il 46S with as much as possible common to both aircraft To meet the schedule for state acceptance trials Ilyushin built only the straight wing version fearing that the design manufacture and flying characteristics of the swept wing aircraft might cause delays Il 46Role BomberNational origin USSRManufacturer Ilyushin Design BureauFirst flight 3 March 1952Number built 1Developed from Ilyushin Il 42Design and development editThe airframe constructed of aluminium alloy with steel used in highly stressed parts resembled a large Il 28 the long fuselage having swept tail surfaces and a similar arrangement of cockpits for the crew of pilot navigator and rear gunner The wing which had moderate taper but straight leading edges copied the layout of the Il 28 being mounted in the shoulder position at the midpoint of the fuselage The flying controls consisted of the usual ailerons elevators and rudder all fitted with trim tabs for reducing loads on the pilots controls during flight in steady states as well as reversible hydraulically powered actuators 1 Two Lyul ka AL 5 engines were fitted in long nacelles forward of the wings exhausting through long jetpipes at the rear of the nacelles aft of the wing trailing edge The engines were mounted in this fashion to make room for the retracted main undercarriage legs two on each side attached to the engine nacelles under the wings The paired main undercarriage legs side by side retracted in opposite directions inboard forwards and outboard rearwards with the single mainwheels rotating 90 degrees to lie flat under the long jetpipes of the AL 5 engines To boost takeoff performance two JATO bottles could be attached to the rear fuselage Performance was also improved when Lyulka AL 5F forseerovannyy afterburning engines were fitted 1 Flight tests and state acceptance trials were successful with the Il 46 meeting all requirements Production was not ordered because the Tupolev Tu 88 proved to have better performance and was ordered into production as the Tu 16 1 The Il 46S swept wing version was designed concurrently but construction was not started to ensure that resources were not diverted from the Il 46 1 nbsp Ilyushin Il 46 plan view silhouetteVariants editIl 46 Il 46SSpecifications Il 46 editData from OKB Ilyushin 1 General characteristicsCrew three Length 25 325 m 83 ft 1 in Wingspan 29 m 95 ft 1 in Wing area 105 m2 1 130 3 sq ft Empty weight 26 300 kg 57 991 lb Gross weight 52 425 kg 115 597 lb Powerplant 2 Lyul ka AL 5 49 05 kN 11 025 lbf thrust eachPerformance Maximum speed 928 km h 527 mph 458 kn Range 4 845 km 3 011 mi 2 616 nmi Service ceiling 12 700 m 41 700 ft Rate of climb 12 25 m s 2 412 4 ft min Armament 3 000 kg of bombs normal load 6 000 kg of bombs overload 2 x 23 mm Nudelman Rikhter NR 23 cannon fixed in the lower port fuselage 2 x 23 mm Nudelman Rikhter NR 23 cannon in an Il K6 turret at the rear of the fuselage See also edit nbsp Aviation portalAircraft of comparable role configuration and era Convair XB 46 Martin XB 48 Short Sperrin Tupolev Tu 14 Tupolev Tu 16References edit nbsp Wikimedia Commons has media related to Ilyushin Il 46 a b c d e Gordon Yefim Komissarov Dmitry Komissarov Sergey 2004 OKB Ilyushin Hinkley Midland pp 146 150 ISBN 978 1 85780 187 3 External links edit Il 46 Il 46S S V Ilyushin Russian Aviation Museum Archived from the original on 2007 09 13 Retrieved 2008 11 04 Retrieved from https en wikipedia org w index php title Ilyushin Il 46 amp oldid 1115530375, wikipedia, wiki, book, books, library,
