235 Section 1974-04-26
OKB Suchoj Su-20
Poland
History
The Suchoj Su-20 aircraft in Polish museums.
The 27 copies Suchoj Su-20 aircraft were used in the Polish Army. The aircraft made its last flight in 1997 and was removed from the state in 1998. From now on, Su-20 aircraft can only be seen in museums. About 10 aircraft were handed over to museums, which is 1/3 of the entire state. In this article we will introduce these planes.
The Polish Aviation Museum in Kraków. Czyżyny.
The Krakow Museum has in its collection Su-20 nb 4242 (initially nb 02) No. 6602. The plane was built in February 1974. Delivered 1974-04-26. During operation, the aircraft received multicolored camouflage. On February 28, 1994, BSP (Air Force Base) in Mierzęcice became Powidz. The engine was removed from the aircraft. In 1997, the aircraft was handed over to the Polish Aviation Museum in Krakow.
The Krakow Museum has in its collection the front part of the Su-20 nb 4244 aircraft (initially nb 04) No. 6604. The aircraft was built in February 1974. Delivered 1974-04-26. The front part of the aircraft was a teaching aid at the technical school in Oleśnica. Since 2010, it has been an exhibit at the Polish Aviation Museum in Czyżyny.
The Su-20 nb 6250, No. 74210 aircraft was also in the Krakow museum for several years. The aircraft was built in 1975 and delivered in 1976. After finishing service in Czyżyny in the warehouse part, disassembled from 2009. Intended as an exhibit for exchange. In 2017, the plane went to Poland: Museum – Zabrze – Park Techniki Wojskowej. Here the plane has been assembled and is presented.
Museum of the Polish Army in Warsaw. Czerniakowski Fort.
The Su-20 nb 6131 aircraft, No. 76301. The aircraft was built in 1976 and delivered in 1976. The aircraft was withdrawn from service relatively early, because it did not undergo renovation and repainting in camouflage. This is the only aircraft in Poland in the initial painting. After serving, he was placed in the Museum of Polish Military Technology, Czerniaków Fort in Warsaw.
The Su-20 nb 6252 aircraft No. 76302. The aircraft was built in 1975 and delivered in 1976. After serving at the Museum of Polish Military Technology, Czerniaków Fort in Warsaw. The plane is in camouflage. The aircraft is unassembled in the back.
The Museum of Armaments in Poznan. Poznan Citadel.
The Su-20 nb 4245 No. 6605 aircraft. The aircraft was built in February 1974. Delivered 1974-04-26. The aircraft operated until 1994-02-28. In 1994, the plane went to the Air Force Base in Mierzęcice, and then in 1995 to the Poznań Museum at the Citadel. Initially, he stood in front of the Citadel, and then at an outdoor exhibition in the Citadel. It is interesting that the plane from the beginning flew with the wings of another Su-20 with serial number 6604, although the beams under the wing had its own. In the unit, he received her markings in the form of an emblem on the fin and an emblem on the bow (the green color of seven indicates belonging to 2 squadron). The aircraft was restored in 2002. The side number is 4245, but was painted over with SCHOOL for some time.
The Lubuskie Military Museum in Drzonów.
Su-20 nb 6138 aircraft No. 74928. The aircraft was built in December 1975. Delivered 1976-03-18. Withdrawal from service 1997-02-28. In October 1999, he was handed over to the museum in Drzonów.
Museum of the Air Force in Dęblin.
The Air Force Museum in Dęblin is the youngest museum facility in Poland. Established in 2010 on the initiative of pilot general Andrzej Błasik. Two Su-20 aircraft are presented in the museum.
The Su-20 nb 6255 aircraft No. 76305. The aircraft was built in 1976 and delivered in 1976. For several years it was an exhibit of the Air and Military Equipment Exhibition in Łódź, next to Lublinek Airport. The exhibition was closed and the exhibits went to Dęblin. This is the second plane in the original painting, without camouflage.
The Su-20 nb 6265 No. 74415. The aircraft was built in December 1975 and delivered 1976-04-09. After serving as an exhibit at a gas station in Broniszewo. In 2010 he came to Dęblin.
The Su-20 nb 7125 No. 74105. Airplane built in 1974. Delivered 1977-02-12. Handed over by the producer for a lost plane. Withdrawn from service on 1995-08-19. In 2012, the plane went to the museum in Dęblin.
Written by Karol Placha Hetman
235 Section 1974-04-26
OKB Suchoj Su-20
Poland
Construction
Engine AL-21
The AL-21 engine consists of a 14-stage axial compressor, annular-tube combustion chamber, 3-stage turbine, afterburner and adjustable discharge nozzle. Compressor 14.5. The maximum temperature in front of the turbine is 1 097 degrees C. The engine is cooled by air drawn by 4 catches located on the fuselage in the rear. Engine length 5.34 m. Maximum diameter 1.03 m. Engine weight 1 800 kg. The fuel is kerosene: T-1, TS-1, RT. Oil IPM-10 or synthetic WNII-50. Specific fuel consumption 0.9 – 1.2 kg / daN / h, with afterburning 1.5 – 2.0 kg / daN / h. The engine’s service life is 900 – 1,500 hours, depending on the production series. Repair period 350 – 450 hours.
The A. Lulka AL-21 engine was used to propel Su-17, Su-20, Su-22 aircraft. Depending on the customer’s wishes, Su-22 aircraft are equipped with an AL-21 or R-29 engine. All Polish Su-22 aircraft were equipped with AL-21 engines, the same ones that powered Su-20 aircraft. These engines are under renovation in Poland in Warsaw.
Written by Karol Placha Hetman
235 Section 1974-04-26
OKB Suchoj Su-20
Poland
Tally
The tally is contained in the previous section.
Written by Karol Placha Hetman