Wind Tunnel Measurements of Trajectories of Roof Sheathing Panels Under High Winds

Abstract eng:
A 1:20 scale aeroelastic model of a house was used to evaluate the failure mechanism and flight mechanics of a scaled 1.2m x 2.4m (4ft x 8ft) roof sheathing panel in a properly scaled turbulent boundary layer The panel was held to the model house with electromagnets which applied scaled restraining forces. The initial failure mechanism and the trajectory of the panel in flight were captured with high-speed digital video. Interestingly, for nominally similar initial conditions, different modes of flight were observed including purely translational and auto-rotational modes. The onset of these modes do not appear to be governed by the initial impulse at failure, rather, they appear to be governed by turbulence in the flow field once the panel is in flight.

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