Ground Idle Kills Power?

[dresoccer4]

Came in to do a short touch and go, and when I landed I lowered both engines to ground. This killed all of my electrical systems, is this supposed to behave this way? I also noticed the engine levers no longer worked. Even if I brought both of them back to STOP the engines would keep running. 

[Nealius]

Generators only work above a certain RPM. APU and APU Gen has to be on to keep electrical power on when in ground idle. Engines also won't shut off unless APU and APU Gen are on.

[dresoccer4]

16 hours ago, Nealius said:

Generators only work above a certain RPM. APU and APU Gen has to be on to keep electrical power on when in ground idle. Engines also won't shut off unless APU and APU Gen are on.

gotcha. so standard procedure is to always turn back on the APU when coming in for a landing?

any idea what the reason is to not allow engines to shut down? seems like a safety issue

Edited October 11, 2024 by dresoccer4

[Nealius]

No idea on why engines won't shut down without APU power, but procedure for just about any aircraft is to turn off avionics before killing the electricity, so APU on is the only way. Apache is the same way, as are the Russian helos IIRC, minus the whole engines not shutting off thing. 

[47_Driver]

On 10/10/2024 at 8:29 PM, dresoccer4 said:

gotcha. so standard procedure is to always turn back on the APU when coming in for a landing?

any idea what the reason is to not allow engines to shut down? seems like a safety issue

 

No no no no. Once the Engine Conditions Levers are in FLT, that's where they stay. You would only further manipulate the ECL's during an emergency or during Shutdown at the end of the flight. It is a known bug that engines don't shut down properly, ED is working on it. As far as your landings go, do not manipulate the ECLs at all once you're in FLT unless you're trying to shut the helicopter down.

[dresoccer4]

On 10/14/2024 at 5:28 PM, 47_Driver said:

No no no no. Once the Engine Conditions Levers are in FLT, that's where they stay. You would only further manipulate the ECL's during an emergency or during Shutdown at the end of the flight. It is a known bug that engines don't shut down properly, ED is working on it. As far as your landings go, do not manipulate the ECLs at all once you're in FLT unless you're trying to shut the helicopter down.

huh? your response doesn't seem to correlate to the comment you quoted. i mentioned turning on the APU during landing in order to maintain electrical supply to your systems. this seems to indeed be the case. and good to know the ECLs are bugged and can't properly shut down

Edited October 18, 2024 by dresoccer4

[47_Driver]

On 10/18/2024 at 9:47 AM, dresoccer4 said:

huh? your response doesn't seem to correlate to the comment you quoted. i mentioned turning on the APU during landing in order to maintain electrical supply to your systems. this seems to indeed be the case. and good to know the ECLs are bugged and can't properly shut down

 

Your original post seemed to indicate that you are manipulating the Engine Condition Levers on the overhead panel every time you land.... If that's the case, do not do that. Once the Engine Condition Levers are in Flight, that's where they stay. If you are doing a touch and go and manipulating the ECLs, you're doing it wrong. Unless you're talking about the Thrust Control Lever/Collective.

 

If you're not manipulating the ECL's, there should be no reason you need supplementary electrical power from the APU, as the main generators will continue to operate as the helicopter maintains 100% rotor speed.