Loose Article upon Going Inverted
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It's never as easy as shown above when you get a loose article upon going inverted. The shock can be disabling (speaking as someone who had a radio fall out of a rack during a slow roll at 300ft agl). I always made a point of pushing -2.0 at height before a LL aeros display.
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"He said they were an inverted pass formation, which McCaughey might have been rolling out of because he was unhappy with it." (statement of the witness who video'd the ten minutes of Snowbirds display leading up to the accident).