aek
lvl.1
Sweden
Offline
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If the transport case is of the sealed type (a rubber sealing around the edge) it most certainly also have an air vent screw.
You have to open this screw during flight to avoid having the transport case being compressed during flight.
If you do not set the vent to open position before flight, then when at high altitude, the case will still let air out when air pressure is lower in the cabin/storage.
BUT, when the airplane then descends and the air pressure in the cabin increase, the case will be severely compressed.
This is most probably the cause of your antennas being pushed into the RC casing.
Did you open the vent before checking in the transport case?
Edit:
Judging from your pictures, your case IS of the sealed type.
Then you will have a hard time blame anyone else but your self, or possible the case manufacturer for not informing you of this.
Edit 2:
I did a fact check and a calculation on this:
The air pressure in the cabin goes as low as about 75% of the air pressure at sea level.
This means that an average air tight transportation case for a drone (50x42cm) would experience a force equivalent of putting a weight of about 500kg or 1100 lb on top of it at the time when the air plane lands!
Assuming that the case vents out air when the cabin pressure decrease (when air craft ascends), and that it is air tight when compressed as the air pressure around it increase (when air craft descends).
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