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Bücker Bü 131

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Old August 25th 17, 03:17 PM posted to alt.binaries.pictures.aviation
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Default Bücker Bü 131


The German Bücker Bü 131 "Jungmann" (Young man) was a 1930s basic training
aircraft which was used by the Luftwaffe during World War II.

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.

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.

Basic trainer

Bücker Flugzeugbau

Carl Bücker

First flight
27 April 1934

1935 (Luftwaffe)

1968 (Spanish Air Force)

Primary users
Spanish Air Force
Imperial Japanese Army Air Service

Bü 133 Jungmeister

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 engins with inverted fuel and oil
systems for aerobatic flight.

Current owners and pilots prize the Jungmann for its outstanding handling
characteristics when compared to other antique bi-planes and even more modern
aerobatic types. Upkeep and maintenance for the Jungmann is comparable to other
antique aircraft and is superior when fitted with the Lycoming engines. Airframe
parts are available from several sources both in the United States and Europe.

Specifications (Bü 131B)

General characteristics
Crew: Two (student and instructor)
Length: 6.62 m (21 ft 8 in)
Wingspan: 7.40 m (24 ft 3 in)
Height: 2.35 m (7 ft 6 in)
Wing area: 13.5 m² (145 ft²)
Empty weight: 380 kg (840 lb)
Loaded weight: 670 kg (1,500 lb)
Powerplant: 1 × Hirth HM 504 four-cylinder inverted inline engine, 70 kW (100

Maximum speed: 183 km/h (99 kn, 115 mph)
Cruise speed: 170 km/h (92 kn, 110 mph)
Range: 628 km (339 nm, 390 mi)
Service ceiling: 4,050 m (13,300 ft)
Rate of climb: 2.8 m/s (6,600 ft)
Wing loading: 46.3 kg/m² (9.49 lb/ft²)
Power/mass: 100 W/kg (0.064 hp/lb)



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