Aircraft / Aviation Vehicles & Artillery Small Arms Warships & Submarines Military Ranks Military Pay Scale (2024) Special Forces

Bucker Bu 131 (Jungmann)

Twin-Seat Basic Trainer Biplane Aircraft

Nazi Germany | 1935

"The Bucker Bu 131 Jungmann of pre-World War 2 Germany proved itself a successful basic training platform for the growing Luftwaffe and others."

Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Bucker Bu 131B Twin-Seat Basic Trainer Biplane Aircraft.
1 x Hirth HM 504 4-cylinder inline engine developing 100 horsepower.
115 mph
185 kph | 100 kts
Max Speed
13,287 ft
4,050 m | 3 miles
Service Ceiling
391 miles
630 km | 340 nm
Operational Range
The nose-to-tail, wingtip-to-wingtip physical qualities of the Bucker Bu 131B Twin-Seat Basic Trainer Biplane Aircraft.
21.7 ft
6.62 m
O/A Length
24.3 ft
(7.40 m)
O/A Width
7.7 ft
(2.35 m)
O/A Height
838 lb
(380 kg)
Empty Weight
1,477 lb
(670 kg)
Notable series variants as part of the Bucker Bu 131 (Jungmann) family line.
Bu 131 - Base Series Designation
Bu 131A - Original German production model.
Bu 131B - Definitive German production model; improvements enacted; powered by the Hirth HM 504A-2 engine.
Bu 131C - One-off test aircraft fitted Blackburn Cirrus Minor engine of 90 horseopower.
Tatra T-131 - Czech pre-war licensed production
C-4 - Wartime production for Germany by Aero of Czechoslovakia.
C-104 - Post-war production undertaken by Aero.
CASA 1.131 - Local-license production undertaken by CASA of Spain; fitted with Walter Minor 4-III series engine; 260 examples completed.
BP-131 - Modernized variant
SSH T-131P - Pre-series Polish model of 1994; four examples completed with Walter Minor 4-III engines.
SSH T-131PA - Polish production model with LOM M332AK engines; model of 1995.
Kokusai Ki-86A Army Type 4 - Imperial Japanese Army production model; powered by Hitachi Ha-47 engine.
Kokusai Ki-86B Army Type 4 - Imperial Japanese Army production model; wood construction and Hitachi GK4A Hatsukaze 11 series engine featured.
Kyushu K9W1 "Momiji" Navy Type 2 - Imperial Japanese Navy production model.
Authored By: Staff Writer | Last Edited: 03/21/2018 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.

The rebuilding German Luftwaffe of the 1930s required flying classrooms with which to train its pilots on. Carl Bucker, a German Navy man of World War 1 (1914-1918), resettled in Sweden after the war and worked at Svenska Aero AB. With a good base of knowledge gained in aeronautics, he returned to Germany and arranged Bucker-Flugzeugbau GmbH in 1932 with the purpose of developing and producing sport planes and related light aircraft. These eventually found their way into the German Luftwaffe.

The company's first product became the Bucker Bu 131 "Jungmann" ("Young Man"), a two-seat (tandem) biplane to be used in the basic trainer role. It was this aircraft that was taken into service by the Luftwaffe to train its fighter pilots in the nuances of basic combat flying. It marked the last biplane aircraft to be manufactured on German soil.

The Bu 131 featured a conventional over-under wing arrangement though both planes were offered slight sweepback. The wings were fitted ahead of midships and the crew of two, in open-air cockpits, were seated closer to the center mass of the aircraft. The engine was placed in the nose in the usual way and drove a two-bladed propeller. The tail unit was also conventional, having a single rudder and low-mounted horizontal planes. The undercarriage was of a tail-dragger arrangement and fixed. Construction was of steel tubing and wood with fabric and metal skinning.

First-flight by way of prototype arrived for the Bu 131 series on April 27th, 1934 and this form was powered by the Hirth HM60Re engine of 80 horsepower. The emerging Luftwaffe contracted for the type in its Bu 131B production form and introduced it into service in 1935. In 1936, another prototype went airborne, this time with a Hirth 504A-2 engine of 105 horsepower.

In practice, pilots appreciated the control quality and agility of their Bu 131 mounts. Its popularity ensured a healthily long service life and nearly all of the Luftwaffe flying schools relied on the type. Foreign customers (both prewar and in-war) of the Bu 131 became Bulgaria, Romania and Yugoslavia. Much of the German wartime production was handled in neighboring Czechoslovakia as the Aero C-4. The Bu 131 was also produced overseas under license by the Empire of Japan, Switzerland and Spain (by CASA as the "1.131").

Content ©MilitaryFactory.com; No Reproduction Permitted.

Such was its value that the Bu 131 remained in global service well into the 1960s and private ownership has kept the design alive at many air shows around the world. Total production reached into the thousands before the end of its run.

Initial models were designated Bu 131A and these were followed by the improved Bu 131 (Hirth HM 504A-2 engines). The Bu 131C was a one-off test plane carrying the Blackburn "Cirrus Minor" engine of 90 horsepower. The two aforementioned production models were the primary marks to carry the Bucker name.

The Bu 131B featured an overall length of 21.7 feet with a wingspan of 24.2 feet and a height of 7.5 feet. Empty weight was 840lb against an MTOW of 1,500lb. Power was from a single Hirth HM 504 4-cylinder inverted inline piston engine developing 100 horsepower and driving a two-bladed propeller unit at the nose. Performance included a maximum speed of 115 miles per hour, a cruise speed of 110 miles per hour, a range out to 390 miles and a service ceiling of 13,300 feet. Rate-of-climb was listed at 6,600 feet.

Beyond Aero's pretime production of the Tatra T-131 was the wartime C-4 production standard for Germany, also by Aero to the Bucker Bu 131B standard. The post-war form became the Aero C-104 carrying the Walter Minor 4-III engine. About 260 were built to this standard.

As mentioned, the Japanese Empire though enough of the German biplane to order local versions to be built for its Army and Navy services. This involved the Nippon Kokusai Ki-86A Type 4 and Ki-86B Type 4 for use as primary trainers. The Ki-86A model carried the Hitachi Ha-47 engine and the Ki-86B was developed with a wooden airframe owing largely to a shortage of metal during World War 2. The Kyushu K9W1 "Momiji" Navy Type 2 Trainer Model 11 was the main production version for the Imperial Japanese Navy (IJN). These were given the Hitachi GK4A "Hatsukaze 11" series engine.

Modern versions of the Bucker Bu 131 are found under the BP 131 designation. Poland developed the SSH T-131P and built four with Walter Minor 4-III engines beginning in 1994. This then evolved to become the production-minded SSH T-131PA of 1995 with its LOM M332AK engine.

Beyond the mentioned countries, the Bu 131, in one form or another, made its way into the inventories of a myriad of nations ranging from Croatia and Greece to The Netherlands and South Africa.

Content ©MilitaryFactory.com; No Reproduction Permitted.
Global customers who have evaluated and/or operated the Bucker Bu 131 (Jungmann). Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 2,000 Units

Contractor(s): Bucker Flugzeugbau - Nazi Germany
National flag of Bulgaria National flag of Croatia National flag of Czechia National flag of modern Germany National flag of Nazi Germany National flag of Greece National flag of Hungary National flag of modern Japan National flag of the Netherlands National flag of Romania National flag of Slovakia National flag of South Africa National flag of Spain National flag of Switzerland National flag of Yugoslavia

[ Bulgaria; Czechoslovakia; Croatia; Nazi Germany; Greece; Hungary; Imperial Japan; Netherlands; Romania; Slovakia; South Africa; Spain; Switzerland; Yugoslavia ]
1 / 1
Image of the Bucker Bu 131 (Jungmann)
Image from the Public Domain.

Going Further...
The Bucker Bu 131 (Jungmann) Twin-Seat Basic Trainer Biplane Aircraft appears in the following collections:
Disclaimer | Privacy Policy | Cookies

2024 Military Pay Scale Military Ranks of the World U.S. Department of Defense Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols Breakdown U.S. 5-Star Generals List WWII Weapons by Country World War Next

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com. No A.I. was used in the generation of this content.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing military medals and ribbons. Special Interest: RailRoad Junction, the locomotive encyclopedia.

©2024 www.MilitaryFactory.com • All Rights Reserved • Content ©2003-2024 (21yrs)