OK, I'll bite.
I'm not sure that the age of the airframe is relevant; if it was I would suggest that all those high energy manoeuvres carried out by the large number of pre 1960 (XH558's build year) aircraft, including Spitfires and the like, might be severely restricted to the point of grounding, nor is "what happened at Shoreham"; something which is under investigation by the AAIB, which respected body has yet to complete its report, although the interim release may have set a few hares running.
The airframe is either capable of a positive G rolling manoeuvre, as Roly Falk demonstrated in 1955, which means that it is, or it isn't. During its service life, I would suggest that Vulcans (generic) were subject to significantly greater manoeuvring stresses than the alleged roll being discussed here. Unless there was a specific airframe restriction placed on XH558, then I can't see why the manoeuvre is up for discussion. Incidentally, the restrictions placed on high performance civil operated jet aircraft following the accident at Shoreham relate to air displays and, in my opinion, owe more to the perceived need of the CAA to "be seen to be doing something" than to response based on known facts. No Hunters, apart from UK civil operated aircraft are grounded. Yes, Shoreham was a tragic accident and the outcome of both the AAIB report and the CAA review into airshows will prove interesting, as will any police investigation.
As for the 925 posts on the Shoreham thread, I wonder how many of them are from people who meet either, or more especially both, of the first two Ps of this forum? I doubt that we will ever know, because we all hide behind our user names.
Last edited by octavian; 6th Nov 2015 at 09:40.
Reason: Removing phrase "piston engined" relating to Spitfires. Don't know of any turbine powered Spitfires!