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Proposal image

High efficient shutter propeller for marine or aircraft application by kiwaho

Please find below the judging results for your proposal.

Semi-Finalist Evaluation

Judges'' comments


While the rotational movement of propellers accounts for low maintenance costs, the proposed reciprocal design will almost certainly result in extra weight to absorb, respectively to transmit the large forces and following greatly increase maintenance costs. This crucial topic was not addressed in the proposal.

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