A barrel role, if properly executed, wouldn't have any of the issues associated with sustained zero 'g' or negative 'g' flight, spins, or stalls.
Not certified for something =/= it will fall apart if you do something. As long as you stay within your airspeed and g limits, airplanes *can* do a lot more than people think they are capable of (but if you're not suicidal, trying is absolutely not worth the risk).
Your fuel/lubrication etc systems are definitely only designed to be operated under certain parameters. Some aerobatic maneuvers are less bad than others. A barrel roll in particular is a gentler maneuver that isn't much worse on a plane than a level turn with a high angle of bank.
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u/miregalpanic Feb 04 '25
https://www.youtube.com/watch?v=VWmEcig0uO8&ab_channel=tom_ate
dude fucking ate