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Bücker Bü 131 Jungmann

1st Flight 1934

The Bücker Bü 131 Jungmann was a German basic training aircraft which was mainly used by the Luftwaffe during World War II.

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 with 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.


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 90 hp (67 kW) 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 Kopřivnice.

Aero C-4

Mass-produced in Aero factory in occupied Czechoslovakia during wartime under original Bücker Bü 131B designation, used post war with original Hirth engine.

Aero C-104

Czechoslovak, post war development with a Walter Minor 4-III engine, 260 built.

CASA 1.131

Spanish license-built versions with Hirth HM 504 or 125 hp (93 kW) ENMA Tigre G-IVA.

BP 131

License-built version

SSH T-131P

Pre-production Polish version, powered by 78 kW (105 hp) Walter Minor 4-III engine.

Four aircraft built during 1994.


Polish production version, with 103 kW (138 hp) LOM M332AK engine.

This version 1st flew during 1995.





6.62 m (21 ft 9 in)


7.4 m (24 ft 3 in)


2.25 m (7 ft 5 in)

Wing area

13.5 m2 (145 sq ft)


NACA 3410.5

Empty weight

380 kg (838 lb)

Gross weight

670 kg (1,477 lb)


1 × Hirth HM 504

4-cylinder inverted air-cooled inline piston engine,

75 kW (100 hp)


2-bladed fixed-pitch propeller


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)


650 km (400 mi, 350 nmi)

Service ceiling

4,300 m (14,100 ft)

Wing loading

46.3 kg/m2 (9.5 lb/sq ft)


0.11957 kW/kg (0.07273 hp/lb)

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