Whats the proper tension for the blade mounting bolts?
Opinions differ on this topic, but here’s mine… I belive that the tension should be high enough to keep the blades from shifting their lead/lag angles at low rotor speeds (e.g. autorotations), but not so high as to put excessive stress on the blade grip and blade bolt, nor so high as to keep the blades from finding their proper lead/lag positions. Try holding the helicopter with the nose pointing straight up and the blades sticking out sidewise. If the blades rotate downward under their own weight, the blade bolts should be tightened. If they blades remain in position, the bolts are tight enough. Note that this is not, in my opinion, a critical adjustment. If the tension is ‘high’ enough to keep the blades from lagging at low head speeds, you’ll be less likely to have boom strikes. If the tension is ‘low’ enough to allow the blades to find their proper lead-lag angles, you’ll be less likely to have vibration problems. If the tension is low enough to not crack the blade grip or blade
