Freezing Bull!!!!
Good stuff JClass.
................We always seem to be surprised by running into unexpectedly complex and powerful behaviour of nature. After a fix or two, and long periods of no trouble, suddenly we dont know it all, and have been running on the edge of serious trouble all the time
........60 years ago we knew all about Met, and Cumulonimbus only went up to 25000 ft.the word Tsunami was unknown.
....... 50 years ago we knew turbines could swallow nutshells and frozen chickens; and that the maximum content of water in cloud at altitude was X% .
.......When lo! a Viscount over Switzerland encountered some tentimesX% and lost 4 engines with internal ice.Research surprised the Met men and proved these figures as a new maximum .
...... So we at Bristols had to redesign our new Proteus (super duper turboprop) with much bigger bleeds and relight facilities .We needed them.
.........It seems we have been a bit slow on the uptake the last 10-15 years . Infomation on many incidents has accumulated and it should have been coordinated, recognising that there could be a lot more H2O up there than thought possible and if internal ice can occur in modern engines during taxy it can also occur aloft.
.........Perhaps the information was well publicised,but nobody sent me a notice!
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