Hughes 500
Now I get it why you want it. Not a lot of information about it to find ... or I look at the wrong place.
The Little Bird has an endurance of 12 hours and carries a maximum mission payload of 2,400 lb (1,090 kg
From Military Wiki. But 12 hours endurance? That I doubt.
But it could lift a ton. But why not taking the MD 600 then. It can lift a ton, too.