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Posted

During the flight all MFDs in the cockpit turns off by themselves. I switched on Bob and every MFD switch on again. This was happen during MP and SP.

The attached trackfile is from the SP. Do not wonder my little son was flying during this time.

LastMissionTrack.trk

Posted

The AC Generators are driven by the rotor transmission and not the engines. The rotor speed must be above 86% for them to provide power. If the rotor speed drops below 86% then AC power is lost and therefore the displays are lost.

Pulling too much collective is the usual culprit for reducing the rotor speed to below 86%.

This can be worse when you are flying high, in hot conditions, or a combination of both is the worst. The engines make less power at higher altitudes and temperatures, and so they can provide less torque to the rotor transmission. 

If you are constantly experiencing drop outs due to altitude or temperature, you can keep the APU running with it's generator switched on. The APU generator will provide power if the main generators drop out.

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Posted

I have had this also yesterday during a normal flight. I don't have uploaded the file yesterday because this was a 2,5h mission.

Posted
13 minutes ago, -Bob- said:

I have had this also yesterday during a normal flight. I don't have uploaded the file yesterday because this was a 2,5h mission.

This is a screen capture from your track file. This is the instrument display moments before the displays go blank.

0.jpg

This is the same frame, but from my exported displays. ROTOR SPEED = NR = 83%

01.jpg

and a fraction of a second later = 78%

02.jpg

and this is hardly the "normal" attitude of a Chinook 🤣

03.jpg

 

in summary, keep the NR speed above 86% and you'll be good.

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