Unfeathering Accumulator Failure Doesn't Stop The Prop From Unfeathering

Buzz

Hi Nick,

I just wanted to bring to your attention that failing the accumulator doesn't stop the prop from unfeathering.

My steps to test.

Fail both right and left unfeathering accumulator in the tablet.
In normal flight, induce a simulated engine failure by reducing one engines mixture to idle cuttoff
Props, Throttle and operating engine mixture to full.
Inop engine throttle to idle, inop engine props to feather detent. Wait until inop engine stops and on the engine tablet page confirm that all pressurized oil has vacated the failed accumulator.

At this point, pushing the prop lever forward out of feather detent should not unfeather the prop. The only way I should be able to get the prop unfeathered is if I spin the engine with the starter while the prop lever is forward and out of detent.

If I push the prop lever forward (No starter), then the prop comes out of feather and the engine starts spinning, thus filling the accumulator.

Is there something in the sim that I'm doing wrong? I would like to use your addon to demonstrate the restart procedures for either a twin with no unfeathering accumulators, or a twin with a failed accumulator.

Edit... In the tablet, when I push the prop lever forward after feathering the inop engine with a failed accumulator, you will see the governor piston move towards fine pitch without any oil behind it.

Thanks

Buzz

Maybe just one other user can confirm that this is not an isolated case?

Buzz

Hi @Black-Square, any comments?

jmarkows

That's usually the fastest way to get his eyes on something, but in fairness he's wrapping up the Caravan for launch next week.

Buzz

@jmarkows thats fair.

Black Square

Don't worry, I was thinking about this problem during my fitful hours of sleep between editing videos. I think I might know what's going on.

Buzz

@Black-Square Thanks Nick. I'm probably the only one who has ever tested it, so don't lose sleep over it. Just the fact that you have acknowledged it is good for the time being. I'm sure in due time you will get around to fixing it.

Cheers