The hawk that crashed is a trainer, so has (by today's fighter aircraft) minimal computer control, so designed to teach the pilots to fly. The aerobatics done by the arrows are not extreme, certainly not outside a normal aeronautical stability envelope, and hence the ability of a human to fly them.
The more extreme modern fighter jets are designed to be aerodynamically unstable, so they are not constrained by the rules of aerodynamics. Only computer control can achieve this
Last edited by: Zero on Wed 21 Mar 18 at 10:04
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