Originally Posted by
md11pilot11
Im a little confused here Boeing built 422 200ERs and 88 straight 200s. The original A and B models would not make good freighters as they have the same volume with a massively low takeoff weight for an aircraft of its size. But the 200ER would be fine. But the problem with the 777 is the wing span. It takes a huge parking spot while a 767/MD11 does not. Either way the freighters of the future will be the A350F and the 767F (I know crazy it’s still going after 40+ years) and the 777LRF.
777F is based on LR, not ER, and they only built 61 of those. It has the larger engine and wing and reinforced floor. The ER would be severely payload/range limited because of those three factors. LR/F has 20'000lbft of more thrust per side than the ER.
Vastly simplified, the 777F/LR is a 200 fuselage with 300 wing and engine.