Loop in a B747 :-)
OK, blame a colleague of mine for this one...
...late night bar conversation leads to a debate; Is it possible to complete a loop in a 747. The debate is unresolved, and the participants soon after fly the seperate ways, both on 747s. Independently they do cockpit visits, and ask the question.
One crew say no, the other say "theoretically" although the stress point would be the engine mounts so you might lose a few in the process. They also say that "it's been done once" but don't say whether any structural damage occurred.
B747 Loop - possible? been done?
We have to know... :-)