by 
Mawgan
ANSWERS: 4
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Probably not, with the speed and make of the jet, it would probably start breaking apart in midair.
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As far as I'm aware such a maneuver has never been attempted in a large passenger plane. I would assume that most airliners would not be able to make the loop quickly enough to avoid stalling as they attempted to go from a vertical climb to an inverted dive.
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The nature of an aircraft, regardless of its size, makes it capable of performing just about any aerobatic manuever. However, airliner components are not rated or constructed to do such manuevers. Due to airspeed limits, g-force limits, and stall limits, parts could be damaged. When the new Airbus A380 was demonstrated at the Paris Airshow, it was pulled into a steep climb but did not pull a loop. A demonstration flight back in the 60's also feautured a Boeing 707 flown upside down. Other than this, I don't even want to know what would happen if a loop was attempted in a 747 or an A340.
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One of my Boeing 727 instructors gave a demonstration in the simulator of flying over the runway at high speed, pulling into a loop, shutting the engines off while inverted, and landing back on the runway. Theoretically, if the simulator can do it, the airplane can also. The problem arises if your technique isn't perfect, the g forces can rapidly exceed the inherent design limitations. The pull-up into the loop exceeds their normal design limit...probably about 3.5 g's to make it over. Definitely in stick-shaker for part of the maneuver. It did take him some practice before he could do it without crashing. Airbus airliner's computer would prevent any such maneuvers, but the older planes could do aileron rolls quite easily. A Boeing 707 test pilot was fired years ago for doing an aileron roll with the CEO on board. Loops are much, much trickier.
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