Puzzle: Warped Turboprop Propeller Blades

I recently took these two picture from the window of a Dash-10 Turboprop. Camera: HTC Desire HD. I can assure that the blades looked normal to the naked eye. Any explanation on the observed warping of the propeller blades in the pictures?

Puzzle solved:

Oscar Gemperle sent me the solution as explained in another blog:

About Hellmuth Broda

Independent Information and Communications Technology Strategist with an interest in the construction sites between business, society and technology. http://www.hellmuthbroda.com
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1 Response to Puzzle: Warped Turboprop Propeller Blades

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