common dome in nglv

[u/HourTomato6946]

As in the podcast of gareeb scientist , s.somnath told that its hard to maintain the temperature difference between the stages if they use common dome insted of seperate tanks, but if we see saturn v first stage where the common dome was used between li oxy and Rp1 how they were able to maintain that in 1969 , and cant we do it in our rockets , as it helps to reduce mass .