It doesn't take much. Consider simple change to uppercase from lowercase changes the ATC telling you "one" or "O"-"N"-"E".

10 hours ago, robert young said:

Thanks for that. Has anyone else here ever managed to feather a prop while going at normal speed and see the feathered prop completely stop with no windmilling or rotation?

I got the thing to feather by setting beta_min to 15.2: that seemed to be where it wanted to settle in static full power runs anyway when given the choice. I was trying to figure out how to get induced power anywhere near accurate from 0-19kts, but I never figured it out. The side effect I figured was a fairly high blade minimum which added more drag on the prop. I had min_rpm_for_feather to something like 1800 (I didn't know if it was prop rpm or engine so I was just testing higher end figures), but turning the fuel off, then putting the throttle to idle and slowing down it did feather automatically, to my surprise! That allowed a whole different area of the flight model to explore.

I also stole this from the kingair, that might be important too:

prop_auto_feathering_available = 1 ; Prop auto-feathering available?  0=FALSE, 1=TRUE

The one somewhere in here https://forums.flightsimulator.com/t/da62x-project-v0-1-3-1-oct-15/294584/201 might be helpful as a reference.

What happens if the min_rpm_for_feather and min_gov_rpm are both the same or overlap? I haven't done any testing in a while now and that's about where I left off.

Its a great airplane, I wish you luck.

10 hours ago, vgbaron said:

Yeah, but you get rated for two!  Go figure!   My first twin training was in a Piper Apache - that does NOT fly on one engine very well, if at all. At least the 310 had some oomph.

Single engine in an Apache is designed to get you to the crash site a bit quicker. 🤣

1 hour ago, jonasbeaver said:

I got the thing to feather by setting beta_min to 15.2: that seemed to be where it wanted to settle in static full power runs anyway when given the choice. I was trying to figure out how to get induced power anywhere near accurate from 0-19kts, but I never figured it out. The side effect I figured was a fairly high blade minimum which added more drag on the prop. I had min_rpm_for_feather to something like 1800 (I didn't know if it was prop rpm or engine so I was just testing higher end figures), but turning the fuel off, then putting the throttle to idle and slowing down it did feather automatically, to my surprise! That allowed a whole different area of the flight model to explore.

I also stole this from the kingair, that might be important too:

prop_auto_feathering_available = 1 ; Prop auto-feathering available?  0=FALSE, 1=TRUE

The one somewhere in here https://forums.flightsimulator.com/t/da62x-project-v0-1-3-1-oct-15/294584/201 might be helpful as a reference.

What happens if the min_rpm_for_feather and min_gov_rpm are both the same or overlap? I haven't done any testing in a while now and that's about where I left off.

Its a great airplane, I wish you luck.

Thanks for that info. I think it depends which aircraft you are editing. I've had no luck with the Diamond DA62 probably because it is an auto-mixture/semi fadec engined machine. It doesn't matter what beta-min or other prop angles I set, the props keep whirring away even in a steep climb ending up below stall speed with one engine shut down. I think this is also connected with the propdefinitions/templates which have a narrow range between prop blurring and non-blurring. I'm going to tweak that to see if I can get the prop to stop. 

It looks like the prop animations are very simplistic. In FSX you could get very sophisticated with animated prop angles and a fine degree of prop feathering. In FS2020 the props look to be either blurred, solid or stopped quite suddenly with little smoothness between the states.

Rob-

Apparently there really is much to do in re. the SDK!  We appreciate your constant attempts to improve the sim.

Ta- C

On a similar theme I don’t think the behaviour of the fixed pitch props in the trainers is correct either.

One of the best features of this sim with it’s detailed terrain and vegetation is the ability to do practiced forced landings and selecting an appropriate field to land in.

I like to add a bit of extra excitement to my PFLs by actually shutting the engine down. The fixed pitch props in the 152 & 172 for example continue to windmill down to about 20kts after landing. I would expect them to stop completely at or around best glide speed. I’ve experimented by slowing right down to the stall with the engine off but still the prop keeps spinning.

It would be nice to see a stationary prop  when gliding in.

Under most real world multi engine training a  power setting is selected on the “failed” engine which equates to the performance characteristics of a feathered prop.

Many years ago I was doing base training on a HS748 turboprop in a part of the world perhaps not best known for its flight safety and the “instructor“ decided to actually shutdown an engine and then practice an inflight restart , ...most exhilarating 😄

Those old 748s were about as hard as it got for single engine work, manual controls with no hydraulic assistance and massive 14ft propeller blades. Single engine go around really made you sweat.

4 hours ago, robert young said:

Thanks for that info. I think it depends which aircraft you are editing. I've had no luck with the Diamond DA62 probably because it is an auto-mixture/semi fadec engined machine. It doesn't matter what beta-min or other prop angles I set, the props keep whirring away even in a steep climb ending up below stall speed with one engine shut down. I think this is also connected with the propdefinitions/templates which have a narrow range between prop blurring and non-blurring. I'm going to tweak that to see if I can get the prop to stop. 

It looks like the prop animations are very simplistic. In FSX you could get very sophisticated with animated prop angles and a fine degree of prop feathering. In FS2020 the props look to be either blurred, solid or stopped quite suddenly with little smoothness between the states.

It was the DA62 I was editing and feathering, I should have been more specific.

Outside of automixture, there is zero simulation of fadec versus any other engines.cfg in the sim. A working fadec would change this plane a lot obviously, the prop rpm to % power scale is interesting. As the DA62 works as the SDK sample, I assume it'll be one of the easier ones to get animated better and maybe even open a door if a modeler became interested

I also had the prop moi all over the place duing that testing, so it may have been a factor. I lost my edits because I had all my work in the official folder, and I didn't know that would be wiped between updates (ouch).

17 hours ago, vgbaron said:

Yeah, but you get rated for two!  Go figure!   My first twin training was in a Piper Apache - that does NOT fly on one engine very well, if at all. At least the 310 had some oomph.

So very true. We used to say that single engine on the apache was only for a longer glide than engine failure in a C172.

1 hour ago, jonasbeaver said:

It was the DA62 I was editing and feathering, I should have been more specific.

Outside of automixture, there is zero simulation of fadec versus any other engines.cfg in the sim. A working fadec would change this plane a lot obviously, the prop rpm to % power scale is interesting. As the DA62 works as the SDK sample, I assume it'll be one of the easier ones to get animated better and maybe even open a door if a modeler became interested

I also had the prop moi all over the place duing that testing, so it may have been a factor. I lost my edits because I had all my work in the official folder, and I didn't know that would be wiped between updates (ouch).

Thanks for that. I'll try more to get it to autofeather, but it occured to me that I could switch off auto feather and assign a key press to manual feather. I must have tried every prop MOI known to man. You obviously hit just the right spot.