In other words what we need is a separate power turbine, only powering a fan or propeller and not combine with a low pressure compressor as is the case with most twin spool turbine engines. This is also needed later for turbine powered helicopters I assume. On a free-turbine the engine doesn’t give a … what the propeller load is as there is no physical connection to the compressor section. I wonder how they did solve the over-ITT when feathering, I believe that problem has been fixed?
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