Sorry Beags - must take issue with you about the U2/Vulcan noise. Many hours on the tin triangle + lived next door to the UK U2 base for many years; also spent many sunny dets watching their antics over the odd glass of the red infuriator. U2 at full power has an identical howl - ok it may be atmospheric conditions related, but it's a fact.
Rgds, FJJP
