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altitude, possibly a consequence of the increased drag and weight penalties inherent in the greater fuselage cross-section and area as a result of the placement of the pilot above the engine. The new M-47 engine proved to be defective with severe vibration problems. Other problems were that the Air Force was not satisfied with the armament and that access to the engine for routine maintenance was severely hampered by the placement of the cockpit over the engine. Another concern was the close placement of the cockpit to the propeller; this was believed to increase the risk to the pilot if he had to bail out or make a
164:(880 lb), but 700 kg (1,500 lb) could be carried in overload condition or four RS-132 rockets could be carried instead. Another version used one 45 mm (1.8 in) cannon, two 23 mm guns and six underwing rockets. Most studies placed the rear gunner in a dorsal turret separated from the cockpit by the main fuel tank, but one study put him in an armored Il-K8 rear turret, but this required a longer fuselage and moving the wings aft to maintain the
172:
they could be adjusted on the ground to fire at a 23° downward angle in addition to the normal level position. The dorsal gunner also fired a Sh-3 gun, which was mounted in a separate, remotely controlled, Il-VU-11 turret that could traverse through 180° and elevated to a maximum of 80°. A cassette of ten AG-2 aerial grenades was provided to deter any fighters approaching from below. Maximum bomb load was 1,190 kg (2,620 lb) and four
171:
The obliquely-mounted fuselage cannon were thought to be too difficult to aim and were not included in the prototype; the weight savings allowed the ammunition for the four 23 mm
Shpital'nyy Sh-3 wing-mounted guns to be increased to 900 rounds. One additional innovation in the prototype was that
155:
As was traditional with
Ilyushin's ground-attack aircraft the Il-20 used a load-bearing armored shell to protect the pilot and gunner as well as the engine, fuel, lubrication and cooling systems. The thickness of the armor varied between 6 and 15 mm (0.24 and 0.59 in) and weighed a total of
139:
Ilyushin's concept to meet the 1947 requirement for a superior aircraft to the Il-10 in performance and firepower was a heavily armored, single-engine, all-metal, low-wing monoplane powered by the newly developed M-47—also known as the MF-45Sh or M-45Sh—liquid-cooled engine, which developed 3,000
180:
The prototype was completed on 27 November 1948 and its first flight was shortly afterwards on 4 December. The best speed that the Il-20 could manage was only 515 km/h (320 mph) at an altitude of 2,800 m (9,200 ft), 36 km/h (22 mph) slower than the Il-10 at the same
163:
A wide variety of armament suites were considered for the Il-20. One involved two wing-mounted 23 mm (0.91 in) cannon and two others mounted in the fuselage, fixed downwards at a 23° angle for strafing targets in level flight. This version's normal bombload was only 400 kg
126:
ground targets while remaining in level flight. However it was slower than the Il-10, and its M-47 engine was problematic in flight tests in 1948–49. It was not placed into production. The test pilots called the aircraft the
176:
were provided in the wing center-section for small bombs. Alternatively two 500 kg (1,100 lb) bombs could be carried on wing racks. Launch rails were provided for four 132 mm (5.2 in) RS-132 rockets.
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152:
extended down to the propeller hub and provided the pilot with a 37° downward field of view; in a medium dive he could view targets directly underneath the aircraft.
261:
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1,840 kg (4,060 lb). The pilot's canopy used armored glass 100 mm (3.9 in) thick for the main windshield and 65 mm (2.6 in) for the
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horsepower (2,200 kW) at takeoff. The design's most notable feature was the pilot's cockpit mounted directly above the engine, reminiscent of the
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These issues, coupled with emerging jet engine technology, led to the cancellation of the Il-20 program on 14 May 1949.
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148:. Furthermore, the cockpit was situated directly behind the four-bladed propeller to maximize pilot visibility. The
114:. It featured a number of innovative concepts including a cockpit mounted on top of the engine, directly behind the
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4 × Sh-3 23 mm (0.906 in) cannon in adjustable mounts outboard of the main undercarriage legs
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that could be adjusted on the ground to fire level or depressed 23° to allow the aircraft to
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Dates of Maiden
Flights by Aircraft Designed by "Ilyushin" Design Bureau
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23 mm (0.906 in) cannon mounted in an Il-VU-11 turret
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V-12 liquid-cooled piston engine, 2,200 kW (3,000 hp)
185:—in which case the bent propeller blades might hit the canopy.
536:
OKB Ilyushin: A History of the Design Bureau and its
Aircraft
199:
The Osprey
Encyclopedia of Russian Aircraft from 1875 - 1995
558:
The Osprey
Encyclopedia of Russian Aircraft from 1875 - 1995
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Abandoned military aircraft projects of the Soviet Union
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http://www.fantastic-plastic.com/IlyushinIl-20Page.htm
19:
For the 1970s aircraft of the same designation, see
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602:http://www.ctrl-c.liu.se/misc/RAM/il-20ily.html
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291:1,680 km (1,040 mi, 910 nmi)
641:
627:
303:5,000 m (16,404 ft) in 8 minutes
534:; Komissarov, Dmitriy and Sergey (2004).
285:515 km/h (320 mph, 278 kn)
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577:The History of Soviet Aircraft from 1918
574:
502:"The Incomplete Guide to Airfoil Usage"
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309:223 kg/m (46 lb/sq ft)
16:Attack aircraft prototype by Ilyushin
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225:15.43 m (50 ft 7 in)
219:13.58 m (44 ft 7 in)
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369:132 mm (5.20 in) rockets
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595:
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318:0.23 kW/kg (0.14 hp/lb)
270:4-bladed constant speed propeller
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106:prototype for a heavily armored
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1028:Single-engined tractor aircraft
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254:9,500 kg (20,944 lb)
231:44 m (470 sq ft)
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452:
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248:7,500 kg (16,535 lb)
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21:Ilyushin Il-18 § Military
1:
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297:7,750 m (25,430 ft)
1038:Aircraft first flown in 1948
1018:1940s Soviet attack aircraft
560:. London: Osprey Aerospace.
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579:. London: Willow Books.
575:Nemecek, Vaclav (1986).
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506:m-selig.ae.illinois.edu
204:General characteristics
412:July 18, 2011, at the
192:Specifications (Il-20)
108:ground-attack aircraft
57:Ground-attack aircraft
538:. London: Ian Allan.
168:in the right place.
142:Blackburn Blackburn
118:, and wing-mounted
48:General information
847:Passenger aircraft
607:2013-10-29 at the
1033:Low-wing aircraft
1013:Ilyushin aircraft
1000:
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500:Lednicer, David.
467:Gordon, pp. 66–67
382:1,190 kg of bombs
301:Time to altitude:
146:Blackburn Cubaroo
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110:to replace the
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100:Ilyushin Il-20
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949:Experimental
859:Il-18 (1946)
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524:Bibliography
509:. Retrieved
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89:First flight
76:Number built
65:Manufacturer
25:
276:Performance
268:Propellers:
258:Powerplant:
135:Development
1007:Categories
915:Il-22 (II)
798:Il-20 (II)
786:Transports
389:References
314:Power/mass
229:Wing area:
150:windshield
120:autocannon
757:Il-22 (I)
706:Il-20 (I)
223:Wingspan:
197:Data from
174:bomb bays
116:propeller
59:prototype
658:Fighters
652:aircraft
650:Ilyushin
605:Archived
556:(1995).
511:16 April
410:Archived
379: :
356:Rockets:
324:Armament
241:Clark YH
70:Ilyushin
985:Trainer
838:PAK VTA
730:Bombers
358: :
236:Airfoil
217:Length:
129:Gorbach
84:History
992:Il-103
930:Il-140
910:Il-20M
894:Il-114
889:Il-108
833:Il-276
828:Il-112
823:Il-106
721:Il-102
583:
564:
542:
377:Bombs:
367:RS-132
289:Range:
124:strafe
104:Soviet
102:was a
976:Il-26
940:A-100
925:Il-38
920:Il-24
884:Il-96
879:Il-90
874:Il-86
869:Il-62
864:Il-18
854:Il-14
818:Il-80
813:Il-78
808:Il-76
803:Il-32
793:Il-12
777:Il-54
772:Il-46
767:Il-30
762:Il-28
716:Il-42
711:Il-40
701:Il-16
696:Il-10
394:Notes
332:Guns:
211:Crew:
31:Il-20
971:Il-8
966:Il-1
961:I-21
956:A-60
935:A-50
752:Il-6
747:DB-4
742:Il-4
737:DB-3
691:Il-8
686:Il-2
670:Il-1
665:I-21
581:ISBN
562:ISBN
540:ISBN
513:2019
365:4 ×
343:Sh-3
341:1 ×
262:M-47
260:1 ×
144:and
98:The
53:Type
1009::
504:.
481:^
438:^
166:CG
160:.
642:e
635:t
628:v
589:.
570:.
548:.
515:.
316::
238::
213:2
79:1
23:.
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