Hi Birdman.
I fly the 222U model regularly.
Operating weight including pilot is 5.900 Lbs (No fuel)
Fuel is 1670 Lbs.
AUW (Max gross) is 8250 Lbs.
This gives you about 680 Lbs (309 kg) payload with full standard tanks which give you about 3 hrs endurance or 360 Nm range with no reserve at 540 lbs fuel burn
pr/hr and 120 kts IAS respectively!
Please note that our helicopters are very heavy equipped with floats, cargo hook, arctic survival gear etc etc...
I always calculate 600 Lbs fuel burn
pr/hr, it gives a little extra safety margin and makes it easier to calculate.
Its a nice helicopter to fly and will handle max load with no problem (w/ LTS 101-750 engines).