Found something on the net!!
Bell UH-1E Iroquois
Rotor Diameter 44 feet.
Length 42 feet, 7 inches.
Height 12 feet, 7 inches.
Empty Weight 5,055 pounds.
Max. Weight 9,500 pounds.
Powerplant 1 Lycoming T53-L-11 turbine rate at 1100 hp.
Crew 1 pilot, 10 passengers.
Max Speed 161 mph.
Thats only 4 less then a 1D could carry on paper . Is that reasonable? I know it depends on the amount of fuel the ship would carry and weather conditions but as a rule of thumb?
Hmmm. I crew ,10 passengers? Well, I suppose if you consider the co-pilot and the crew chief as passengers. By that rationale, the UH-1D comes down to an upper load of 11 seated passengers when you factor in co-pilot (almost invariably the case) a crew chief/ door gunner and additional gunner and the D was a much bigger bird.
The UH-1 E was basically an aluminium version of the B and C model Hueys. The first ones were based on the B model, later they used the C. The B had an uppermost seated capacity of seven passengers. The C had a more powerful engine but no increase in cabin size or AFAIK seats.
I suspect the Marine E models had no increase over the B in terms of passenger lift. I’ll check that though.
At any rate the E model wasn’t primarily utilised as a lift ship. Its designated role was primarily command and control and recce, although they were heavily used as gunships. Their over use in the armed role detracted from their principle role and became something of an issue to the Marines, an issue that wasn’t solved until the Marines started receiving early model AH-1 gunships and OV-10 Broncos from around 1969 onward.