All in the fuselage. The A model holds 5824 pounds, 754 gallons usable
fuel, in four interconnected cells. It is fueled 'over the wing'
through two ports. The auxiliary cell is forward, holds 143 gallons
and is burned first via a tranfer pump. This is for CG control. FWIW
this aux fuel does not show on the fuel quantity indicator. The
forward main cell (491 gal) and the aft cells (2x36 gal, 1x190 gal)
burn down equally. The aft center 190gal cell is between the engine
air inlet ducts. The aft right and left 36 gal cells fit around the
air inlet ducts outboard of the aft center cell. The four electric
boost pumps are in the forward main cell and feed the engine-driven
boost pump. The B model did not have the forward (aux) fuel cell and
was therefore short on fuel and so we normally carried tip tanks (or
2xAIM9 plus pylon tanks) on it. There is an option in the G model and
I think the CF104 for a 122 gallon cell in the gun bay. Further info =
pylon tank usable fuel 195 each; tiptanks usable fuel 170 each. FWIW
filling with JP5, due to greater density, gave 6050 internal fuel,
about 4% more. Also FWIW a four tanked F104 could out range a
three-tank F4 considerably - 3:00 hours and 1500 miles practicable by
dropping externals as emptied, with another 300 miles at cruise
altitude to zero fuel remaining.
Walt BJ