It sounds like you guys don't understand this one.....
A Bell Helicopter's tail driver is reactive.......
An EC 120's fenestron is pro-active......
The difference?????
If the Bell's tail driver fails, you react!
If the Fenestron fails, you have to be pro-active, which means that you have to get on top of the first problem before the second problem happens......If you don't, then the third problem will make matters worse, and by the time the 4th problem occurs, you're dead meat. That is of course, if you have not been "pro-active"
Sounds like a reasonable argument to me.
(Info courtesy of FM
