The following is a direct quote from the Spitfire II Pilots notes   i High speed in the dive This coupled with the fact that the very effective elevator control and comparative instability in pitch of this aeroplane makes it very easy for the pilot to impose high load factros or g when looping doing tight turns or pulling out of the dive Altough the safety factor of the aeroplane is about  it is well within the pilots power g the wings would certainly fail is this figure is much exceeded In very bumpy atmposphere etc etc   Everybody is free to make his own conclusion and wheter the other accusations to which I do not even bother to reply have any sort of credibility They are in my opinion the struggling of an aircraft fan against referenced documented verifiable facts by all means available for some time now Baseless accusations do not make good contributions