sentences:  The Bristol Mercury, then being manufactured under license in Finland for the Bristol Blenheim bomber, was chosen as the engine, since it was readily available.The prototype (VH-1) made its first flight on 6 February 1951, in Tampere, piloted by captain Esko Halme.After successful test flights, the FAF ordered 30 production aircraft, called Valmet Vihuri II, on 27 February 1951.