Last Wednesday a Lockheed Martin LM-100J performed a loop at the world-famous Farnborough Air Show. This is was so impressive! I wonder what kind of airspeed is required for this kind of stunt?

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    $\begingroup$ It really isn't about going fast, its energy management and not over-speeding on the way over. I can't find it, but this speed is very likely right at Va (design maneuvering speed). $\endgroup$ – Ron Beyer Jul 21 '18 at 17:56

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