Engineering:Proto 2 (aircraft)

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Short description: Romanian training biplane
Proto-2
69199-d0a275ec9856387aa9ef4e3c68b10b9d.jpg
Proto-2 aircraft
Role Trainer aircraft
Manufacturer Fabrica de avioane Astra
Designer Ștefan Protopopescu
improved at the Astra Factory
First flight 1924
Introduction 1924
Retired 1930
Primary user Romanian Air Force
Number built 25

Proto 2 was a training biplane manufactured at the Fabrica de avioane Astra in Arad in 1924.[1][2]

Design and development

Following the accident of Ioan Sava, a new variant of the Proto 1 was created, called the Proto 2. The airplane kept the original design, but as a safety measure, the structure of the wings was strengthened by increasing the section of the spars and adding another pair of interplane struts.[2]

Service

Two parked Proto-2 planes

After these improvements were made, the Astra Factory built 25 aircraft. The airplanes were then supplied to the Ministry of War, which assigned them to the Military Flying School of Tecuci.[2]

Specifications

Data from Romanian Aeronautical Constructions 1905-1974[2]

General characteristics

  • Crew: 2
  • Length: 7 m (23 ft 0 in)
  • Wingspan: 9.6 m (31 ft 6 in)
  • Height: 2.9 m (9 ft 6 in)
  • Wing area: 28.86 m2 (310.6 sq ft)
  • Empty weight: 730 kg (1,609 lb)
  • Gross weight: 1,140 kg (2,513 lb)
  • Powerplant: 1 × Hispano-Suiza water-cooled V-8 engine, 130 kW (180 hp)
  • Propellers: 2-bladed wooden propeller

Performance

  • Maximum speed: 174 km/h (108 mph, 94 kn)
  • Stall speed: 79 km/h (49 mph, 43 kn)
  • Service ceiling: 5,000 m (16,000 ft)
  • Time to altitude: 3,000 m (9,800 ft) in 22 minutes

References

  1. Nicolae Balotescu (1984) (in ro). Istoria aviației române. Bucharest: Editura Științifică și Enciclopedică. pp. 207–209. 
  2. 2.0 2.1 2.2 2.3 Ion Gudju; Gheroghe Iacobescu; Ovidiu Ionescu (1974). Romanian Aeronautical Constructions 1905-1974. p. 96. https://commons.wikimedia.org/wiki/File:Romanian_Aeronautical_Constructions_1905-1974.pdf.