TBM 850

@rbringh looking at a PIM/POH/whatever, it looks like RPM is only really changed during run-up to exercise the prop, and during cruise to reduce noise at mostly negligible impact on all other parameters. As long as you change Np slowly, it doesn't have a large impact on overall torque in the sim, but quick changes will do something. There's also a torque limiter at work when you aren't in 850 Mode that makes everything but torque regulate to remain safe, and in 850 Mode where the limiter is inactive, I really don't know what's even going on. A footnote on Np in a performance table (all tables are made for 2000 RPM...): Propeller RPM utilization between 1600 and 2000 RPM is possible without changing performance. Display the TRQ indicated in table with Np = 2000 RPM, then reduce Np without exceeding 121.4 % TRQ. That pretty much looks a bit like leaning, but for noise, and some Socata Magic.

@derek its all good mate - sorted. Jase

@eker Watching both the Justflight info video, and 737ng driver detailed test flight, there is no restriction in low prop rpm area. Without gates in our hardware throttles, I am glad BS simplified the beta range, in ground fine pitch (in air) you certainly hit the wall and drop out of the sky. Excellent decision by the developers..