Piper M600 - Excessive Idle Thrust

Bug Reporting Hub Aircraft & Systems
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ISSUE DESCRIPTION

M600 has such excessive idle thrust, that it is almost impossible to slow down during descent. Real turboprops should start slowing down rapidly when thrust is set to flight idle, because the propeller acts like a speedbrake.

At lower altitudes, M600 can only descent around -300 fpm with throttle on idle while keeping the same speed.

REPRODUCTION STEPS

Please list clear steps you took in order to help our test team reproduce the same issue:

  1. Take off with M600 and climb to 5000ft.

  2. Start descending in FLC mode set to maintain 130kts and set idle thrust.

  3. Observe maximum vertical speed is only around -300fpm.

MEDIA

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A windmilling propeller acts more like reverse thrust than a speedbrake. In any case, this seems excessively low. I don’t think there is any default aircraft in MSFS with accurate windmilling drag. I did some experiment with the TBM in FS2020 days, the conclusion was that propeller feathered or windmilling resulted in the same glide ratio. Wonder if this is a MSFS wide problem still.