A Look at Aerobatics Accident Statistics

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Why did you exclude "engine failure." Have you never heard of "Tillie" from WW-II and her diaphram for Spitfires to fly negative "g's"? Or an inverted flight tank? Saber jets, barrel roll, Phantoms oblique loop into chandelle. Don't neglect "inverted oiling system" as a missing element in aerobatic capability. This is WW-I stuff. SPADS and Nieuports? And of course can we clump oil and fuel tanks together for two strokes? Gas Turbines are beyond Brinnell with ETOPS and run dry for endurance right side up.