It literally has already flown. > All successful designs so far have one or two main engines, may have additional engines but of significantly lower thirst. W

It literally has already flown. > All successful designs so far have one or two main engines, may have additional engines but of significantly lower thirst. What? The SLS has 4, and its the highest tonnage rated operational rocket in existence. The Falcon Heavy has 27 engines and flies commercial NASA missions