Originally Posted by
wrench1
No clue why you quoted me. I'm not the OP. But for reference, Bell has offered factory blade tape options for a number of models via a M&O procedure or as a bulletin.
nice picture of particulate erosion... does anyone have the current Bell procedure to hand or their bulletin on the issue as wrench1 has indicated? If so, please PM.
High particulate wear rates changes with disk loading and also spanwise lift distribution on the blade. Both of these affect the inflow velocity through the tip. The weight and how much time you have stuff recirculating is controllable by the driver. The lift distribution is from the section choice and blade twist. That can be changed but is not trivial. A few other chopper blades have detail inboard on the blade that does exactly that, increasing inboard lift distribution. Still sucks to own helicopters.
Whitehouse, G. R., & Quackenbush, T. R. (2010). Aerodynamic Design of Helicopter Rotors for Reduced Brownout.
Nternational Powered Lift Conference.
Tritschler, J. K., Celi, R., & Leishman, J. G. (2014). Methodology for Rotorcraft Brownout Mitigation Through Flight Path Optimization.
Journal of Guidance Control and Dynamics,
37(5), 1–15.