The Weiss WM-10 Ölyv (English: "Buzzard") was a 1930s Hungarian biplane trainer designed and built by the Manfred Weiss company.

First flown in September 1931 the WM-10 was a single-bay two-seat primary training biplane powered by the companies own 75 kW (100 hp) MW Sport I engine.^[1] The prototype was later modified to take the more powerful 89 kW (120 hp) MW Sport II engine and an improved landing gear and eight were built as the WM-10a and delivered in 1933. The last aircraft was re-engined with a 97 kW (130 hp) MW Sport III engine and larger fuel tanks and re-designated the WM-13 .

Five more aircraft were built with Siemens-Halske Sh 12 engines as aerobatic trainers for use by combat units as the EM-10. In 1938 all surviving aircraft we re-engined with the Siemens engine and all were known as the WM-10. Three aircraft survived with the military to 1941 when they were retired to be used as glider tugs.^[1]

WM-10

Prototype with a 75 kW (100 hp) MW Sport I engine, one built.^[1]

WM-10a

Production aircraft with a 89 kW (120 hp) MW Sport II engine, eight built. One converted to WM-13 and survivors later re-engined with a Siemens-Halske Sh 12 engines.

WM-13

One WM-10a re-engined with a 97 kW (130 hp) MW Sport III engine.

EM-10

powered by a 82 kW (110 hp) Siemens-Halske Sh 12 engined aerobatic trainer, five built.

 Hungary

• Hungarian Air Force

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General characteristics

• Crew: 2
• Wingspan: 9.50 m (31 ft 2 in)
• Powerplant: 1 × MW Sport II , 89 kW (120 hp)

Related lists

• List of Interwar military aircraft