Andy Ross wrote:
What is the rationale behind the decision to make them rigid on the BO105? The only advantage I can see is that you save a few axles and bearings, which are moving parts that can wear out. But you pay for it in extra stress cycles on the blade, so I can't see how this is a win. The articulation joints really aren't very complicated, especially compared with the cyclic control system which you have to have anyway...
Andy
It's the flight behavior. This rotor system works in a range from -5 to +5 g (maybe more on the positive side) (i.e. the bell jet ranger rotor works only at positive g ) and has a extremely fast reaction on control input. You can do acrobatics with the bo105 and it is much easier to fly than many other helicopters.
Maik
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