Powerplant was a 420 hp Wright Whirlwind R-975-E3 nine-cylinder air-cooled radial engine, and it was fitted with a fixed forward-firing 0.303 in (7.7 mm) KSP machinegun in the upper cowling. The first flight was made by company test pilot Lieutenant Jorma Visapää at Tampere on March 29, 1939, the following May the Finnish AF ordered forty examples. These were delivered in 1941, serialed PY-2 to PY-41 (c/n I/1 to I/40), and had a revised cockpit, a braced tail unit, and could alternatively be equipped with a ski-undercarriage, later a radio was added.
The Pyry II remained in Finnish AF service until September 7, 1962 as advanced trainer and in variety liaison and ancillary roles. The prototype Pyry I (serial PY-1 c/n 1) is preserved at the Keski-Suomen Ilmailumuseo (Aviation Museum of Central Finland) at Tikkakoski, reportedly a total of 7 aircraft are preserved, including the pictured one at the Suomen Ilmailumuseo (Finnish Aviation Museum).
Span: 32 ft 2 in (9.80 m)
Length: 25 ft 3 in (7.70 m)
Height: 8 ft 4 in (2.55 m)
Wing area: 136.70 sq.ft (12.70 sq.m)
Empty weight: 2,304 lb (1,045 kg)
Loaded weight: 3,380 lb (1,535 kg)
Max speed: 205 mph (330 kmh)
Max diving speed: 298 mph (480 kmh)
Cruise speed: 180 mph (290 kmh)
Landing speed: 62 mph (100 kmh)
Climb: to 9,842 ft (3,000 m) 9 min 15 sec
Service ceiling: 18,373 ft (5,000 m)
Range: 466 mls (750 km)
Endurance (70% power): 2.5 hours."