Originally Posted by Looks like 250
the helicopter doesn't appear to be struggling with a gross overload.
I hope you do. I see you created a new specific PPRUNE user, with its programmatic user name, to make this statement. Your points about being sceptical whether this is not libel are well noted.
However, why should the aircraft struggle? Why would there be at all max gross weight restrictions, if the aircraft ran out of power ("struggle" in your words) before reaching this limit? If the aircraft was to struggle, then it is called a performance limitation.
Max gross weight limitations (and other limitations that tell you
not to use AVAILABLE torque or engine power) are there because under certain conditions (namely, cold and low) the power plant does
not struggle to put out more power than any or all of the downstream components can handle in the long run (gearbox, rotor head, blades, etc.).
As whipping dog pointed out below, the subsequent potential failure is in all generality delayed, and - when it happens - often catastrophic.
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Here is another one seemingly from the same operator. But much better camera work.
https://youtu.be/XH4OiMmhEk4