Hopfner HS-5/28

The Hopfner HS-5/28 was a utility aircraft built in Austria in the late 1920s. It was a conventional, parasol-wing monoplane with seating for two occupants in tandem, open cockpits. The landing gear was of fixed, tailskid type with divided main units. Two examples were built with Walter NZ60 engines, followed by two more with the more powerful NZ85 for Swiss aeroclub use. One of these latter machines remained in service until 1934.

Variants

• HS-5/28 - version with NZ60 engine
• HS-5/28a - version with NZ85 engine

Specifications (HS-5/28a)

General characteristics

• Crew: One pilot
• Capacity: 1 passenger
• Length: 7.40 m (24 ft 3 in)
• Wingspan: 11.26 m (36 ft 11 in)
• Height: 2.55 m (8 ft 4 in)
• Wing area: 18.5 m² (199 ft²)
• Empty weight: 400 kg (880 lb)
• Gross weight: 650 kg (1,430 lb)
• Powerplant: 1 × Walter NZ85, 63 kW (85 hp)

Performance

• Maximum speed: 150 km/h (96 mph)
• Range: 1,200 km (750 miles)

References

• The Illustrated Encyclopedia of Aircraft. London: Aerospace Publishing. p. 2174. 
• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 511. 
• Уголок неба