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Wiolfgang:
The plywood sheet was only on the upper surface of the wing. The span from the leading edge to the front spar was wider than most wings. In a dive the cenmnter of pressure moved aft on the chord of the wing increasing the upward force on the leading edge of the wing. Without the plywood reinforcement on the bottom surface, the bottom capstrips and ribs failed resulting in the loss of the leading edge and the upper fabric cover.
According to the Gorrell Reports this problem was solved and the Nieuport 28c1 was going to rbe reissued to the USAS Pursuit Squadrons in 1919.
Blue skies,
Dan-San Abbott
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