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So any news about the low-noise propellers for the spark?
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<blockquote data-quote="maumau" data-source="post: 57406" data-attributes="member: 7885"><p>Just to help clarify. The purpose of winglets is to avoid turbulent flow of air at the tip of the aircraft wings from high pressure air, below the wing, toward low pressure air, over the wing. This induces, as said before, less vortex, drag, fuel consumption, etc, and makes the wing more efficient. In case of props, it would be irrealistic to add more weight at the tip due mainly to high centrifugal force and high speed. Better efficiency is obtained by special design and shape of the blades.</p></blockquote><p></p>
[QUOTE="maumau, post: 57406, member: 7885"] Just to help clarify. The purpose of winglets is to avoid turbulent flow of air at the tip of the aircraft wings from high pressure air, below the wing, toward low pressure air, over the wing. This induces, as said before, less vortex, drag, fuel consumption, etc, and makes the wing more efficient. In case of props, it would be irrealistic to add more weight at the tip due mainly to high centrifugal force and high speed. Better efficiency is obtained by special design and shape of the blades. [/QUOTE]
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So any news about the low-noise propellers for the spark?