John Manders made an interesting point to me. He said that he saw a gas turbine APU run up at Yesterday's Farming and it occurred to him that a catastrophic blade failure at a public event might have very dire consequences indeed. After all, the engine is being run bare and uncontained, something that no turbine is allowed to do now on modern jets.
Naturally, there are an ever increasing number of turbines about now and some of the older ones might well be forty or fifty years old and been stored in very doubtful circumstances. I know of one Derwent that makes the occasional appearance that was retrieved from a scrapyard.
John postulated that whilst the insurance company would cover any damage etc to third parties, the premium would be lots the following year. I've been turning this over in my mind and I think that any insurance company faced with a whacking great bill would want to examine the circumstances carefully before opening their corporate wallets and saying "help yourself". It was certainly not a risk they signed up for and I urge you to recommend to your club to inform their insurers that gas turbines might appear at their events in future.
Apart from any other reason they might find to hide behind, the rule of uberime fide ("of utmost good faith" ) would probably apply
Regards,
J. Kim Siddorn,