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The Weiss WM-21 Sólyom (English: Falcon) was a 1930s Hungarian light bomber and reconnaissance biplane developed by the Manfred Weiss company. It served in World War II, often accompanied by other old, or else substandard, planes.

WM-21 Sólyom
Role	Light Bomber/Reconnaissance Biplane Type of aircraft
National origin	Hungary
Manufacturer	Manfred Weiss
First flight	1937
Introduction	1939
Retired	1945
Primary user	Magyar Királyi Honvéd Légierő
Number built	128
Developed from	Weiss WM-16 Budapest

Design and development

The WM-21 was designed to replace the WM-16, which was based on the yet older Fokker C.V, and as such was considered unsuitable for operational service.^{[citation needed]} 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.[1] A conventional biplane, the Sólyom was powered by a 870 hp (649 kW) Weiss WM-K-14A radial engine, and had an open cockpit.[1] A total of 128 aircraft were built by three different factories: 25 by Manfred Weiss, 43 by MAVAG, and 60 by MWG.[2]

Operational history

Throughout the war, the Royal Hungarian Air Force used 48 of them for reconnaissance. They served alongside 38 Heinkel He 46s, and 37 IMAM Ro.37s, supplemented by 13 Heinkel He 111s.^{[citation needed]} They first entered service in 1939 with short-range reconnaissance units. Although they were active during the 1940 dispute with Romania, their first active operational use was during the Axis invasion of Yugoslavia in April 1941.[1]

During the invasion of Yugoslavia, none of the WM-21's were lost in combat, but one was lost in an accident.[3] From June 1941 they were used to support Hungarian Army units in Ukraine, and then against Soviet partisans.[1] They lost another WM-21 on June 29, when the war against the Soviet Union was intensifying.[4] Around 80 aircraft were also transferred to duties as trainers, as they were removed from operational use, until 1945.[1]

Operators

 Kingdom of Hungary

• Royal Hungarian Air Force

Specifications

Data from [1][5]

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)

Performance

• Maximum speed: 320 km/h (200 mph, 170 kn)
• Range: 750 km (470 mi, 400 nmi)

Armament

• Guns: 3 x 7.9mm (0.31in). First using the Gebauer 1934.M GKM, later the Gebauer Machine Gun 1926/31.M[6]
• Bombs: 12 x 10kg (22lb) Anti-personnel bombs or 60 x 1kg (2.2 lb) incendiary bombs

References

Notes

Bibliography

• The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
• "Round-Out". Air Enthusiast (65): 77–78. September–October 1999. ISSN 0143-5450.

На других языках

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- [en] Weiss WM-21 Sólyom

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[fr] Weiss WM-21 Sólyom

Le Weiss WM-21 Sólyom (en français : « Faucon ») était un biplan léger de bombardement et d'observation hongrois, développé au cours des années 1930 par la compagnie Manfréd Weiss (en hongrois : Weiss Manfréd Acél- és Fémművek (en)).

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[it] Weiss WM-21 Sólyom

Il Weiss WM-21 Sólyom fu un aereo da ricognizione e bombardiere leggero, biposto e biplano, sviluppato dalla divisione aeronautica dell'azienda ungherese Weiss Manfréd Acél- és Fémművek nei tardi anni trenta.

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[ru] Weiss WM-21 Sólyom

Weiss WM-21 Sólyom (рус. сокол) — венгерский двухместный разведывательный самолёт 1940-х годов.

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