Boeing 1968 study, four improved Saturn S-IC first stage stretched TO 498 inches with 6.64 million pounds propellant and 5 F-1 engines each and 4 S-II second stage with 5 J-2 engines
and a payload shroud of 86.5 feet in diameter and 240 feet long for a payload of over
1 million pounds

#boeing #nasa #ksp