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Duxford propellors

"Duxford propellers" is the work of some 14-year old students attending a STEM fair activity at the Duxford Air Museum near Cambridge organised by the STEM Team East on 14th June 2012. The points A, B and D define the size and shape of the propellers. The point C is animated to revole on the circle centre A through D. Click on the "Start" button to fire up the engines!