Weiss WM-21 Solyom

The Weiss WM-21 Sólyom (English: Falcon) was a 1930s Hungarian light bomber and reconnaissance biplane developed by the Manfred Weiss company from the earlier WM-16 which was based on the Fokker C.V.

Weiss WM-21 Solyom
Class Aircraft
Type Bomber
Manufacturer Manfred Weiss Steel and Metal Works
Production Period 1939 - 1945
Origin Hungary
Country Name Origin Year
Hungary 1937
Country Name Operational Year Retirement Year
Hungary 1937 1945 View
ManufacturerName Production From Production To Quantity
Manfred Weiss Steel and Metal Works 1939 1945 128 View

The WM-21 was designed to replace the WM-16, which was considered unsuitable for operational service. The WM-21's structure was strengthened, and the aircraft received a new, more efficient wing set. A tailskid was fitted to allow for shorter landing runs on grass airfields. A conventional biplane, the Sólyom was powered by a 870 hp (649 kW) Weiss WM-K-14A radial engine. A total of 128 aircraft were built by three different factories, Manfred Weiss built 25, 43 by MAVAG and 60 by MWG.

The first aircraft entered service in 1939 with short-range reconnaissance units, although active during the 1940 dispute with Romania their first active operational use was during the Axis invasion of Yugoslavia in August 1941. From June 1941 they were used to support Hungarian Army units in Ukraine and then against Soviet partisans. Around 80 aircraft were also transferred to duties as trainers, as they were removed from operational use, until 1945.

Role Light Bomber/Reconnaissance Biplane
National origin Hungary
Manufacturer Manfred Weiss
Introduction 1939-1945
Number built 128
Developed from Weiss WM-16 Budapest

General characteristics

  • Crew: 2
  • Length: 9.64 m (31 ft 8 in)
  • Upper wingspan: 12.90 m (42 ft 4 in)
  • Lower wingspan: 9.40 m (30 ft 10 in)
  • Height: 3.5 m (11 ft 6 in)
  • Empty weight: 2,300 kg (5,071 lb)
  • Gross weight: 3,400 kg (7,496 lb)
  • Powerplant: 1 × Weiss WM-K-14A radial, 650 kW (870 hp)


  • Maximum speed: 320 km/h (199 mph; 173 kn)
  • Range: 750 km (466 mi; 405 nmi)


  • Guns: 3 x 7.9mm (0.31in) Gebauser machine-guns
  • Bombs: 12 x 10kg (22lb) Anti-personnel bombs or 60 x 1kg (2.2 lb) incendiary bombs

End notes