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: PZL-106AR Kruk

PZL-106AR Kruk
Poland
agricultural plane
1981



  • Technical data


Span 14.92 m (48 ft 11 in)
Length 9.1 m (29 ft 10 in)
Take-off weight 3000 kg (6614 lb)
Maximum speed 211 km/h (114 kt, 131 mph)
Ceiling 4000 m (13,000 ft)
Range 680 km (423 mi)
Armament
Powerplant :
PZL-3SR 7-cylinder air-cooled radial engine rated at 600 hp (442 kW)

 


The PZL - 106 Kruk (raven) was designed by Andrzej Frydrychewicz as a descendant of the PZL-101 Gawron (crow). It was a light, single engine, single seater agricultural aircraft of an all-metal construction, with a strut reinforced low-wing configuration. The work on the design had been carried out during the time the aviation industry was engaged in the production of the ill-fated jet agricultural aeroplane, the M-15. The prototype was flown in April 1973. After consecutive tests, the information series begun – 7 aircraft were built. The last two machines from the series became the PZL-106A prototypes. Simultaneously, tests with spraying equipment were run. Line production started at the PZL works in 1976. Between 1976 and 1983 different power units were tested on the aircraft.

The PZL-106 A appeared as a follower of the T-tailed PZL-106 prototype. Series production began in 1976. In Poland, and especially in Egypt and Sudan, Ravens were operated by the Agricultural Service Works. In Africa they replaced less safe and less efficient PZL-101 Gawron aircraft which were then withdrawn from service. The Raven was bought in significant numbers by the former German Democratic Republic "Agrarflug" company which cooperated with PZL in development of the dispersal assembly.

The aircraft construction is similar to the PZL-106 prototype (SP-PBK). In serially built aircraft, the metal side panels could be removed to make easier loading of dispersal assemblies for longer deployments. For that reason, the hopper featuring a special pump assembly was used as an auxiliary fuel tank of 900 litres capacity. The PZL -106 was produced in three versions: PZL-106A- powered with PZL 3 S engine and US 132000 propeller, PZL-106AR – powered with PZL-3SR engine and US 133000 propeller, and the PZL-106AS – powered with Asz-62IR (1000 HP/736 kW) engine and AW-2-30 propeller.

In 1981, a new B-type wing with modified profile, shorter, streamlined braces, electric driven flaps and integral fuel tanks was designed. Ravens featuring that type of wings and PZL-3SR and ASz-62IR engines were manufactured since 1982 as the PZL-106BR and PZL-106 BS respectively. In 1989, a turboprop version for the Czech Walter M-601 (600 HP/442 kW) engine was designed and manufactured as the PZL-106BT-601 ( it was the first Polish turbo prop aircraft). In 1981, a fire-fighting version featuring special pump assembly and the hopper for the fire-fighting media was designed. Another interesting version was a school-trainer, where the hopper accommodating in his upper part a cockpit for instructor and in the lower part a hopper (of 300 litres capacity) for the liquid chemicals was mounted in the place of serially-built hopper. Such solution allowed pilot training alternately with performing service operations with the same aircraft.

In the following years, A. Frydrychewicz designed for a whole family of multipurpose aircraft, including even an armoured version. Production ceased in the late 1980s, to be renewed in 1995. In total, 147 aircraft in the A, AR, AS plus 126 in the BR, BS and 32 in the BT version were manufactured. 102 Ravens were in service in the former DDR, 72 operated in Poland, and the rest of aircraft were operated in South America. In Poland, the type has already been withdrawn from service.

The example on display is a serially built PZL-106 AR Kruk (factory number 07810131, 7th batch). It was manufactured in 1981 by the PZL Warszawa-Okęcie. The engine is 600 HP( 442 kW), PZL-3SR supplied by WSK Rzeszów and the US 133000 propeller supplied by PZL Okęcie. Until 1992 the aircraft (bearing SP-KFB markings) remained in service with WSK PZL Rzeszów as the test-bed for the PZL-3S and -SR types engines in-flight trials. It was donated to the Museum by WSK PZL-Rzeszow in 1992.

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Dofinansowano ze środków Ministra Kultury i Dziedzictwa Narodowego
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