Bücker Bü-131 Jungmann
Germany — Basic training aircraft
Archive Photos
Bücker Bü-131 "Jungmann" (G-BPTS) c.1994 at the Imperial War Museum Duxford, Cambridgeshire, England (Photos by John Shupek)
Overview 2
The Bücker Bü-131 "Jungmann" (Young man) was a German 1930s basic training aircraft which was used by the Luftwaffe during World War II.
- The Bücker Bü-131 "Jungmann"
- Role: Basic trainer
- National origin: Germany
- Manufacturer: Bücker Flugzeugbau
- Designer: Carl Bücker
- First flight: 27 April 1934
- Introduction: 1935 (Luftwaffe)
- Retired: 1968 (Spanish Air Force)
- Primary users: Luftwaffe; Spanish Air Force; Imperial Japanese Army Air Service
- Produced: 1935 - 1945
- Number built: around 5000
Development 2
After serving in the Kaiserliche Marine in World War I, Carl Bücker moved to Sweden where he became managing director of Svenska Aero AB (Not to be confused with Svenska Aeroplan AB, SAAB). He later returned to Germany with Anders J Andersson, a young designer from SAAB. Bücker Flugzeugbau GmbH was founded in Berlin-Johannisthal, in 1932, with the first aircraft to see production being the Bü-131 Jungmann.
While it was Bücker Flugzeugbau’s first production type, the Bü-131A was the last biplane built in Germany. It had two open cockpits in tandem and fixed landing gear. The fuselage was steel tube, covered in fabric and metal, the wings wood and fabric. It first flew on the 80 hp (60 kW) Hirth HM60R.
In 1936, it was followed by the Bü-131B, with a 105 hp (78 kW) Hirth 504A-2.
Most wartime production for the Luftwaffe was by Aero in Prague.
Operational History 2
Sturdy and agile, the Bü-131A was first delivered to the Deutscher Luftsportverband (DLV). The Bü-131B was selected as the primary basic trainer for the German Luftwaffe, and it served with "virtually all" the Luftwaffe’s primary flying schools during the war, as well as with night harassment units such as Nachtschlacht Gruppen (NSGr) 2, 11, and 12. Yugoslavia was the main prewar export customer; "as many as 400 may have found their way" there. She was joined by Bulgaria with 15 and Romania with 40.
Production licenses were granted to Switzerland (using 94, 88 built under licence to Dornier), Spain (building about 530), Hungary (which operated 315), Czechoslovakia (10, as the Tatra T 131, before war began), and Japan, the last of which built 1,037 for Army with Hatsukaze power as the Kokusai Ki-86 and 339 for the Imperial Japanese Navy Air Service (IJNAS) as the Kyushu K9W. In Spain, production continued at CASA until the early 1960s. The Jungmann was retained as the Spanish Air Force’s primary basic trainer until 1968.
In the 1960s and early 70s the Spanish, Swiss and Czech governments sold their Jungmanns to private owners many being exported to the United States. About 200 Jungmanns survive to this day, many having been fitted with modern Lycoming O-320 (150 hp) or O-360 (180 hp) four cylinder engine with inverted fuel and oil systems for aerobatic flight.
Variants 2
- Bü-131A: Two-seat primary trainer biplane. Initial production version.
- Bü-131B: Improved version, powered by the more powerful Hirth HM 504A-2 piston engine.
- Bü-131C: Experimental version, fitted with 67 kW (90 hp) Cirrus Minor piston engine. One built.
- Nippon Kokusai Ki-86A Army Type 4 Primary Trainer: Japanese production version for the Imperial Japanese Army Air Service. Powered by a Hitachi Ha47
- Nippon Kokusai Ki-86B Army Type 4 Primary Trainer: Wooden airframe version to relieve scarce supplies of strategic materials.
- Kyushu K9W1 Momiji Navy Type 2 Trainer Model 11: Japanese production version for the Imperial Japanese Navy. Powered by the Hitachi GK4A Hatsukaze 11
- Tatra T.131: Czechoslovakia, pre-war licence production in Tatra Koprivnice.
- Aero C-4: Mass-produced in Aero factory in occupied Czechoslovakia during wartime under original Bücker Bü-131B designation, used postwar with original Hirth engine.
- Aero C-104: Czechoslovakia, postwar development with a Walter Minor 4-III engine, 260 built.
- CASA 1.131: Spanish license-built versions
- BP 131: modern license-built version
- SSH T-131P: Pre-production modern Polish version, powered by 78 kW (105 hp) Walter Minor 4-III engine. Four built from 1994.
- SSH T-131PA: Main Polish production version, with 103 kW (138 hp) LOM M332AK engine. First flew 1995.
Operators 2
- Bulgaria: Bulgarian Air Force
- Czechoslovakia: Czechoslovak Air Force; Czechoslovakian National Security Guard
- Independent State of Croatia: Zrakoplovstvo Nezavisne Države Hrvatske
- Germany: Luftwaffe
- Greece: Hellenic Air Force
- Hungary: Royal Hungarian Air Force
- Japan: Imperial Japanese Army Air Service; Imperial Japanese Navy Air Service
- Netherlands: Royal Netherlands Air Force
- Poland: Polish Air Force (1 bought for tests before 1939)
- Romania: Royal Romanian Air Force; Romanian Air Force
- Slovakia: Slovak Air Force (1939-45)
- South Africa: South African Air Force
- Spain: Spanish Air Force
- Switzerland: Swiss Air Force
- Kingdom of Yugoslavia: Yugoslav Royal Air Force
- Yugoslavia: SFR Yugoslav Air Force
Specifications (Bü-131B) 2
General Characteristics
- Crew: 2
- Length: 6.62 m (21 ft 9 in)
- Wingspan: 7.4 m (24 ft 3 in)
- Height: 2.25 m (7 ft 5 in)
- Wing area: 13.5 m² (145 ft²)
- Airfoil: NACA 3410.5[6]
- Empty weight: 380 kg (838 lb)
- Gross weight: 670 kg (1,477 lb)
- Powerplant: 1 × Hirth HM 504 4-cylinder inverted air-cooled in-line piston engine, 75 kW (100 hp)
- Propellers: 2-bladed fixed-pitch propeller
Performance
- Maximum speed: 183 km/h (114 mph, 99 kn)
- Cruise speed: 170 km/h (110 mph, 92 kn)
- Landing speed: 82 km/h (51 mph; 44 kn)
- Range: 650 km (400 mi, 350 nmi)
- Service ceiling: 4,300 m (14,100 ft)
- Time to altitude: 1,000 m (3,281 ft) in 5 minutes 12 seconds; 2,000 m (6,562 ft) in 12 minutes; 3,000 m (9,843 ft) in 23 minutes; 4,000 m (13,123 ft) in 45 minutes
- Wing loading: 46.3 kg/m² (9.5 lb/ft²)
- Power/mass: 0.11957 kW/kg (0.07273 hp/lb)
References
- Shupek, John. Photos, copyright © 2009 Skytamer Images. All Rights Reserved
- Wikipedia,the free encyclopedia. Bücker Bü-131