-10 also has fore and aft body tanks where the below deck cargo holds would be. I'm not sure the capacity of these tanks, but the total fuel onboard the KC
-10 could be 356,000 lbs. It had the standard wing and center wing fuel tanks the DC-10-30CF had.
The body tanks actually give you more control over the CG, as you can rapidly change it to what you want. But you can also get your self into trouble with it, too, if you are not careful in monitoring it.
IIRC, the KC
-135 foreward bvody tank had a max capacity of about 40,000 lbs. The aft body tank could hold about 46,000 lbs, and the upper deck tank (which could only drain into the aft bodt tank) held about 14,400 lbs. The center wing tank held about 40,000 lbs and could drain into the foreward body tank, the inboard and outboard main wing tanks held a combined total of about 56,000 lbs and the reserve wing tanks held about 5,600 lbs. The reserve tanks could only drain into the outboard mains, and all four main wing tanks could drain into the aft body tank.
Total fuel capacity, with all 10 fuel tanks full was 202,000 lbs. On an EWO loaded KC
-135A, the max fuel was adjusted to use the max runway lenght and the average monthly temps. Water used for the water injection weighed about 5,600 lbs, and the max ramp weight for the KC
-135A/Q was 301,600 lbs, the KC
-135E/R/T had max weights much higher. The KC
-135D either used the KC
-135A weight if it had the J-57-59W engines, or the KC
-135E weight if it had theTF-33-102 engines (recycled JT
-3D engines from airliner B-707s).
I could be off a little on my numbers, it has been 20 years since my last KC