R22 blades
Thanks for the feedback so far,but i have checked the set of blades i have spare, and they definately have a curve on them. when you consider the torque involved in spinning up around 30lb of blade in which there is a 2lb tip weight plus the forces induced when the pitch is increased it would not seem surprising for some distortion to take place after a couple of thousand hours.If my theory is correct then it follows that there should be an increase in blade thickness at about 6 feet out from the root.Iwill check this tomorrow. Is this possibly one of the reasons the blades have time limit on them?