When MT made the 5blade composite for the TBM, hartzell bought the first unit, says the distributor. 3-4 years later hartzell now has its own 5 blade composite design. For the TBM, o/h and repair costs for the hartzell were going way up and I'm told the mt blades are far cheaper/easier to repair and replace if there is damage.
Paul They've been dabbling with the dark arts for a few years now...
--Mark
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