Archive digitization



Aviation and Diplomacy

Frank Piasecki

NATO 1949-2009 Projekt ekspozycji w Muzeum Lotnictwa Polskiego w Krakowie



Polish Aviation Museum

31-864 Kraków,
al. Jana Pawła II 39
phone: (12) 640 99 60,
(12) 642 40 70
e-mail: info@muzeumlotnictwa.pl

a cultural institution of the Malopolska Region

Małopolska – Kraków Region


Patronage

Kraków Airport







Aeroplane: WSK An-2R

WSK An-2R
USSR / Poland
agricultural plane



  • Technical data


Span 18.18 m (59 ft 7 in)
Length 12.4 m (40 ft 8 in)
Take-off weight 5500 kg (12,125 lb)
Maximum speed 250 km/h (135 kt, 155 mph)
Ceiling 4400 m (14,400 ft)
Range 1200 km (746 mi)
Armament
Powerplant :
9-cylinder radial ASz-62IR rated at 1000 hp (736 kW)

 

This multi-purpose aircraft was designed by the Oleg Antonov design bureau. The prototype flew in 1947. The aircraft was serially built in the Soviet Union, Poland and China. In Poland, the An-2 was serially built in 1960-2002 by WSK Mielec. Totally, 11954 aircraft were built. The most numerous was the agricultural version (7880). Altogether with the AN-2 manufactured in the Soviet Union and China it was the agricultural aircraft biggest batch ever produced. The main importer of the Poland-produced An-2 was the Soviet Union (10628), 464 aircraft were operated in Poland.
An-2 is an all-metal, single engine biplane with fixed undercarriage. The wings and the empennage are fabric covered. The upper wings are equipped with automatic slats, and both-upper and lower wings are equipped with landing flaps. The upper wings also house metal fuel tanks of 1200 litres total capacity.
The fuselage in its middle section houses a cargo bay, and in the “agro” version the hopper is placed there.
The fuselage has two doors: the smaller for crew and passengers, the bigger – outwards-opening – for cargo loading. The cockpit features dual controls. The undercarriage wheels can be replaced with skis or floats in a floatplane version. The powerplant consists of 1000 HP (736 kW) ASz-62IR, 9 cylinder radial engine and the AW-2 flexible pitch propeller of 3,6 m diameter.
The basic component of all dispersal systems is a 1350 litres capacity hopper. It is manufactured of fibre-glass reinforced epoxy laminate. In the dusting version the aircraft under-belly spreader is mounted to the hopper and the hopper upper part features two chemicals loading hatches and a fan driven inner mixer.
In the spraying version, the centrifugal pump assembly is fitted to hopper and a set of pneumatic valves supplies liquid to the under-wing and under-belly tubes equipped with 96 nozzles (which can be of different sizes and types). The U LV- spraying version assembly features set of tubes equipped with atomizers.
The An-2 is particularly useful in a heavy-duty operations. Aircraft structure is tough-designed and tested in the extreme environment of artic and tropical temperatures. Big load capacity and fuselage volume enables to carry spare engines, dispersal assemblies or workers of the agro teams. Strong undercarriage, equipped with big-size tyres and the high-lift wings enables operating even on the rough, temporary stripes. Lack of the de-icing installation remains a main failure of the An-2.
The aircraft on display, registration SP-WMK, was manufactured in 1974 and flew a total of 7465 hours in Poland, Iran, Egypt, Tunisia, GDR and Slovakia. It was donated by the Aerial Application Service Works in Mielec after an overhaul conducted by the former employees of the company.

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