"Isn't a barrel roll just a 1G manoeuvre ?"
This has always struck me as one of those urban myths: if anyone can explain to me how it is possible to recover from a diving manoeuvre (1st and 4th quarters of the roll) to climbing and level flight (respectively), without experiencing more than 1 g, I'd be grateful to hear it. Gentle it can be, 1g I don't see how (and I've done one or two.)