so you didnt follow the link? the helicopter used there is actually double the lifting capacity of the one youre using... "maximum takeoff weight of 6,000 lbs."

Yes that does not mean the information was correct, Nerdist, Maxim, and corporatehelicopters, actual helicopter company all say it was an Airbus, not the one you are stating at all.

and this was the conclusion on the calculation:

At a 12 degree angle of attack, in order to maintain the same altitude, the helicopter had to have been using about 76% of its maximum engine power. Or 26% towards the lateral movement; which equals to about 780 pounds.

Yes an amazing fan calc.