Propeller never stop after shutdown
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Hi all, following the shutdown procedure I noticed that if I maintain the propellers lever in "HIGH RPM" position the propellere never stop. If I move the propeller levers in feathered position the propeller stop immediately. Which is the correct procedure? Regards.
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Sometimes ambient wind speed can keep the prop spinning after shutdown. I don't know if Nick can change that threshold without unrealistic behavior regarding an inflight shutdown but it seems to happen with only moderate wind for me sometimes. To answer your question, you should not feather the props on piston engines during a normal shutdown as the feather locking pins will not engage.
Longer answer: prop pitch is governed by oil pressure. On twin engine pistons oil pressure is required to keep the props in the low pitch high rpm position. This is to aid in feathering a prop in the event of an in flight engine failure. Locking pins lock the engine in the low pitch position during a normal shutdown where the rpm is less than around 1000rpm to ensure the engine can be restarted (as the prop in the high pitch position would cause too much drag in the direction the prop is spun through the air for the starter motor to successfully start the engine). As such, it is interesting that rpm has any effect on the prop still spinning when you pull the rpm back after shutdown unless you shut down the engine at a high rpm...
Maybe @Black-Square can shed some more light on the limitations of his model as I know he is limited to what can be done in MSFS without fully modelling everything outside the sim probably using WASM. *Note we would have a lot less black square planes if he went into that much depth so hopefully the native tools or parameters he needs can be implemented by Asobo to get more realism like this accurately modelled in the sim. (For instance look at the amount of A2A planes using WASM vs Black Square and consider Nick is one guy and A2A has a bit more man power). All said I rarely see the problem, but I may just be flying in a less windy area than you... maybe try parking facing down wind
