Which is the reason for the corrugated sections—the space between tanks that needed extra structure. https://apollo11space.com/why-are-the-interstage-rings-of-

Which is the reason for the corrugated sections—the space between tanks that needed extra structure. https://apollo11space.com/why-are-the-interstage-rings-of-the-saturn-v-corrugated/ https://apollo11space.com/why-are-the-interstage-rings-of-th...