Sorry, that was a mistake! It’s all fixed now, Steam is on b8.

“its complicated”

Do you have flight experience?
->As soon as you lift of the helicopter flips over to the left

Depends on the rotation of the blades, in take off to hover, anticlockwise main blade helos tend to drift to the right, and you have to counter this with “left ski low”, main blades with clockwise rotation are opposite aiui. -> sounds like the 407 is clockwise -> not sure.

there’s a “lot” of unintuitive behaviour for the helos into hover that takes a ton of practice,
https://www.youtube.com/watch?v=eXR1olg_I0w
I burnt about 6 hours of real fuel “just” practising auto-rotation from hover.

Once you are out of translational lift, out of ground effect they behave almost exactly like airplanes.

From take off up to and beyond translational lift, lots of things to remember -> and getting it “smooth” is as least as much about incredibly fast reactions as it is about expected behaviour.

b6 seemed to hit “real world” almost to the bullseye, b7, not so much, we’ll see what b8 brings.

Ah – OK, never stop learning 🙂

They mean the same thing.

I read: loss of oil pressure FAILS propeller to feather pitch

not: will feather the prop

Just to note one more thing about this: the feathered prop has the least drag, which makes it a great choice for failure in the air, especially with those huge turboprop blades that would be like a speed brake if left unfeathered. The feathered prop has the _most_ drag when starting the engine. Since the coupling of the prop and gas turbine on the PT-6 is not mechanical, this isn’t a big problem – the engine can just “slip”.

For a geared engine like the garrett, failing to feather is still a great idea in the air for safety reasons, but starting the engine with a feathered prop would make things harder for the starter motors – they’d have to spin up the prop as well as the turbine. So geared turboprops typically have prop mechanical prop locks that stop the engine from feathering when you shut down at the gate. X-Plane can simulate that too.

I think the settings do exactly what you express. The setting says that a LOSS of oil pressure feathers the pitch, and as you said, the oil pressure is used to _unfeather_ The prop – the feathering behavior you get when oil pressure is gone is due to springs. So the kingair is set up correctly.

I´m kind of confused….
Heli flight model seems to change in strange ways. Had severe problems with ver. b1, b3, b4 and b6. As soon as you lift of the helicopter flips over to the left, even on a calm day without any wind at all. If you manage to handle this ( and that´s more luck than skills ) the same thing happends when you descend and almost touch the ground hovering. Seems, so far, to again be “back to normal” ( like in ver. b2 and b5 ) in ver. b7.
Flying with DF´s Bell 407 ( that´s supposed to have one of the best flightmodels for Helicopters in X-plane 11 ) and Active Sky XP. Have tried to fly both with these deactivated and in a lot of different conditions ( Custom mode ( no weather at all ! ) X-planes weather, ASXP activated and with different payload ) but still got the same result. Hope now that ver. b7 and further on remains stable.

Have made bugreport on ver. b6 covering even earlier versions.

Confession – my meteroric Mac cross-platform experience extends to arguing with X-Code until my MSVC developed plugins build and run politely. So Mac terminology goes past me — but I get the drift and understand that this is known, which is good news. I’m sure we’ll eventually hear more about this when it percolates up past all of the Vulkan/Metal efforts. And there may be more to learn to add to my Mac game. Thanks! I think!! 😉