Weiss WM-10 Ölyv

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

Development
First flown in September 1931 the WM-10 was a single-bay two-seat primary training biplane powered by the companies own 100 hp MW Sport I engine. The prototype was later modified to take the more powerful 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 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.

Variants

 * WM-10
 * Prototype with a 100 hp MW Sport I engine, one built.


 * WM-10a
 * Production aircraft with a 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 130 hp MW Sport III engine.


 * EM-10
 * powered by a 110 hp Siemens-Halske Sh 12 engined aerobatic trainer, five built.

Operators

 * Hungarian Air Force
 * Hungarian Air Force