Aircraft overview

The Bucker BU-131 Jungmann is a two seat, single engine biplane designed in Germany by Bücker Flugzeugbau as a primary trainer and light aerobatic aircraft. It first flew in 1934 and entered production before the Second World War, with licensed production continuing in countries including Switzerland, Spain and Japan. Its importance comes from its role as one of the defining European training biplanes of the 1930s and 1940s, valued for light controls, benign handling and genuine vintage character. Surviving examples today are typically operated as historic sport aircraft, display aircraft and advanced tailwheel trainers.

Performance & specifications

Typical performance depends strongly on engine fit, propeller, airframe condition and whether the aircraft is an original German built machine, a licensed version or a later restoration. A standard Bucker BU-131 Jungmann with the Hirth HM 504 series inverted four cylinder engine is commonly associated with about 105 hp. Typical cruise speed is around 85 to 95 knots, with a maximum speed a little above 110 knots. Published range is commonly in the region of 350 nautical miles, while service ceiling is generally quoted at about 13,000 feet. Maximum takeoff weight is around 1,500 lb, giving a useful load of roughly 600 lb on many examples. Buyers should verify the exact weight and balance sheet for the individual aircraft, especially where modern radios, starters, electrical systems or engine conversions have been installed.

Cabin & avionics

The Bucker BU-131 Jungmann has two open cockpits in tandem, with the student or passenger usually in the front seat and the pilot in the rear. It is a fabric covered, wire braced biplane with fixed conventional landing gear, so cockpit access, wind exposure and ground handling are part of the ownership experience. Avionics are normally simple VFR installations: basic flight instruments, engine gauges, a radio, transponder and sometimes a portable GPS or compact panel navigator. Integrated glass suites such as Garmin Perspective or Garmin G1000 are not typical or appropriate for this aircraft category.

Buying & value

Condition, documentation and originality drive Bucker BU-131 Jungmann values. Important checks include fabric age and quality, wing and fuselage structure, corrosion control, landing gear condition, engine supportability and the completeness of logbooks. Common market distinctions include original Bücker built aircraft, Swiss Dornier built Bu 131 variants, Spanish CASA 1.131 examples and aircraft with non original engines. Some aircraft have modern electrical systems or radios, while others are kept closer to period specification. Current PlaneFox used market data shows an average asking price of about EUR 92,000, with observed listings from roughly EUR 49,000 to EUR 162,000, placing the type in the specialist vintage and warbird trainer segment rather than the mainstream light sport market.