Tuesday, October 11, 2005

Blackbird wing corrugated - Fun fact for UFO maniacs and Art Bell fans

Studies of the aircraft's titanium skin revealed the metal was actually growing stronger over time due to the intense heating caused by aerodynamic friction, a process similar to annealing.

Major portions of the upper and lower inboard wing skin of the SR-71 were actually corrugated, not smooth.

The thermal expansion stresses of a smooth skin would have resulted in the aircraft skin splitting or curling.

By making the surface corrugated, the skin was allowed to expand vertically as

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