Can't shutdown engines fully

[ryanbatc]

After landing and taxi to park the manual says Power lever to ground idle, then cond lever to START.  My props DO feather and I let the ITT stabilize.  Then I move the cond lever to fuel cutoff....  the instrumentation shows zero but I still hear the engines and the props are turning pretty well (I can see about 6 blades in the animation per disc)

 

What am I missing?

[Goran_M]

There's definitely something you're missing.  

If it happens again, maybe try a reinstall.

[Vinny003]

Hi, guys!

I think I got the same issue like what ryanbatic have but I'm not sure. After I set the cond levers to fuel cutoff, the prop RPM gauges should slowly go to 0 RPM instead of instantly, and as the turbines are winding down, the turbine RPM goes down the same rate like in the real Saab 340A, but I can still hear the engine running until the turbine RPM goes to about 5% RPM then the engine stops, instead of the engine stops at 5% RPM, the engine noise would decrease as the turbine RPM is decreasing as seen on the turbine RPM gauges. I installed the Saab 340A correctly. Thanks!

Cheers,

Vincent

[JGregory]

I just ran a test.  I did an Auto-Start and after the engines were running for a few minutes I simply moved the condition levers to fuel-cutoff.  The engine and prop rpm decreased as expected and the gauges indicated the proper values. The engine and prop sounds coincided with the engine and prop rpm as would be expected.

 

 

After I set the cond levers to fuel cutoff, the prop RPM gauges should slowly go to 0 RPM instead of instantly, and as the turbines are winding down, the turbine RPM goes down the same rate like in the real Saab 340A, but I can still hear the engine running until the turbine RPM goes to about 5% RPM then the engine stops, instead of the engine stops at 5% RPM, the engine noise would decrease as the turbine RPM is decreasing as seen on the turbine RPM gauges.

Besides being one of the longest sentences I have ever read in a forum post, it is very confusing. Are you saying the gauges are, or are not, working properly?   Are you saying the engine sound is, or is not, coincidental with the engine rpm?  Please re-state what you are trying to convey.  As I stated above, the sounds seem to be working as they should.

[Vinny003]

Hi, JGregory!

I'll explain this to you, I don't know if the prop RPM gauges are working properly or not. The engine sound should be coincidental with the engine RPM but I don't think it is in the LES saab 340A. Please start the engines manually instead of using auto-start and shut the engines down to see what I mean and please note the prop RPM as you shut the engines down. Thanks!

Cheers,

Vincent

[JGregory]

Vincent,

 

Whether you Auto-Start or manually start the Saab has no bearing on the engine sounds.  However, I did a manual start and then shutdown with the same results as expected.  The OP was about the engine sounds still being heard after the gauges were at zero and that is what you said you were also experiencing.  I cannot recreate this.  The prop RPM also drops as expected.

[Vinny003]

Hi, JGregory!

I think the prop RPM gauges goes instantly right to 0 after shutting down the engines. I think the propellers stop rotating almost instantly after the engines is shutdown which coincides with the prop RPM gauges, but the engine gauges however it takes a couple of minutes before the engine completely stop rotating which also coincides with the engine % RPM gauges. Thanks!

Cheers,

Vincent

Edited March 27, 2014 by Vinny003

[JGregory]

Vincent,

 

If the power is turned off to the bus that the gauges are on then the gauge will stop functioning, obviously.  The propellers DO NOT stop rotating immediately after the engines are shut off.

[Vinny003]

Hi, JGregory!

That makes sense! I guess the generators power the prop RPM gauges but I'm not sure. It sounds like it takes the propellers about several seconds to stop rotating.

Cheers,

Vincent

[Vinny003]

Hi, JGregory!

I paid attention to the prop RPM gauges when I shut the down the engines, it works like it should. When I shut the engines down the Ng RPM gauges works like it should but the turbine sound is not coincided with the Ng RPM gauges like the sound level is not decreasing as the Ng RPM gauges is decreasing. Thanks!

Cheers,

Vincent

[JGregory]

Vinny,

 

I have tested this many times in several different ways.  The sounds are working as they should.

[Vinny003]

Hi, JGregory!

Got it! That makes sense! Thanks!

Cheers,

Vincent