The Bell Boeing CV-22B Osprey is an American multi-mission, tiltrotor military aircraft with both vertical takeoff and landing (VTOL), and short takeoff and landing (STOL) capabilities.
It is designed to combine the functionality of a conventional helicopter with the long-range, high-speed cruise performance of a turboprop aircraft, wikipedia says. At noon today, Hungarians could admire this special combat aircraft.
The flight was part of a NATO exercise and Hungarian troops were aboard, check out the photos: