Proto 2 (aircraft)
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Proto 2 was a training biplane manufactured at the Fabrica de avioane Astra in Arad in 1924.
Proto-2 aircraft
Spar (aeronautics)
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In a fixed-wing aircraft, the spar is often the main structural member of the wing, running spanwise at right angles to the fuselage. The spar carries flight loads and the weight of the wings while on
Proto 2 (aircraft)
…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. After these improvements were made, the Astra Factory built 25 aircraft. The airplanes were then supplied…
Main spar of a de Havilland DH.60 Moth
Basic metal-sparred wing using a honeycomb 'D' box leading edge