Avia B-33

1st Flight 1951

In 1951, the Czechoslovak firm Avia secured a license to make Il-10s, with the designation B-33.

The first one flew on 26 December 1951.

Initially, their engines were Soviet-built.

From 1952 onwards the engines were also produced in Czechoslovakia as the M-42.

Besides the combat variant, a Czechoslovak trainer variant also entered service under the designation CB-33.

In total, 1,200 B-33s were built by 1956.

The Avia B-33, became a basic ground attack plane of the Warsaw Pact countries.

The Polish Air Force used 281 B-33s.

In Poland, the B-33 was modified to carry 400 l fuel tanks under its wings.

From 1950 to 1960, Czechoslovakia used 600 B-33s.

From 1949 to 1956, the Hungarian Air Force used B-33s.

From 1950 to 1960, the Romanian Air Force used 156 B-33s.

Bulgaria also used these aircraft.

Variants

Avia B-33

Licensed built variant of the initial Il-10

Avia BS-33

Licensed built two-seat operational trainer.

Specifications

Crew: 2

Length: 11.06 m (36 ft 3 in)

Wingspan: 11.06 m (36 ft 3 in)

Height: 4.18 m (13 ft 9 in) (tail up)

Wing area: 30.00 m2 (322.9 sq ft)

Empty weight: 4,680 kg (10,318 lb)

Gross weight: 6,335 kg (13,966 lb)

Max take-off weight: 6,535 kg (14,407 lb)

Fuel capacity: 747 L (164 imp gal; 197 US gal)

Powerplant: 1 × Mikulin AM-42 liquid-cooled V12 engine, 1,320 kW (1,770 hp) (maximum continuous power, 2,350 rpm)

Propellers: 3-bladed AV-5L-24, 3.60 m (11 ft 10 in) diameter

Performance

Maximum speed: 551 km/h (342 mph, 298 kn) at 2,800 m (9,200 ft); 507 km/h (274 kn; 315 mph) at sea level

Cruise speed: 310 km/h (190 mph, 170 kn) at 500 m (1,600 ft)

Range: 800 km (500 mi, 430 nmi) at 500 m (1,600 ft)

Service ceiling: 5,500 m (18,000 ft)

Time to altitude: 5 minutes to 3,000 m (9,800 ft)

Armament

Guns:

4x 23 mm NS-23 (150 rpg) in wing.

1× 20 mm Berezin B-20 cannon (150 rpg) or 12,7 mm UBT machine gun (150 rpg) in rear turret.

Rockets: 4× RS-82 or RS-132 rockets

Bombs:

6× 50 kg (110 lb) bombs or

4× 100 kg (220 lb) bombs or

2× 250 kg (550 lb) bombs.

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