Hello the "tweakscale" does not bring the expected result, the increase of the speed allows to a small extent to overcome the problem,
but the rotor loses its speed beyond a collective pitch of 7.5,
rising beyond allows the takeoff even under 60 t of load but the rotor then loses speed and no longer offers lift.
A version with 6/8 blades and collective pitch angle up to 20 or 25 would be appreciable
This is a machine translation I am French
mi inspiration source