Originally Posted by pete999
2. Empirical evidence for density that is dangerous to an engine.
Number 2 is the responsibility of engine manufacturers. Maybe the industry will fund such research now for the future.
Oh, but airline industry is conducting such a research on an Europeanwide basis right now. If things go pear shaped, at least historical LIDAR, wx baloons and research aircraft data will show what was the concentration that stopped the fun. If not we'll know what's the safe level.
I did participate in a "test" flight today, albeit on the fringes of the VA propagation forecast (as forecast by the Met Office, not Eurocontrol) and therefore I would be only too happy to wake up and discover that Finnish Hornet story was hoax, that data from Friday's met flight in UK are secret to hide the fact that closing the aerospace was overreaction and that avoiding VA by using Mk1 eyeball guarantees long and happy engine life.
What are my chances of waking up fat, dumb and happy?
Poor to nil, I'd estimate.