Aviasud AE-206 Mistral

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with forward swept wings, with the all-moving lower wings used as large ailerons, and a conventional, all-moving tailplane

Frenchness confirmed

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Not many tricycle biplanes

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For gods sake put it out of its misery.

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Wow this is indeed VERY weird, good find OP. The pics on Wikipedia show that this biplane has forward swept wings!!