Given the fact that small container ships are easier to manufacture than big container ships.. then why is it considered better to build bigger ships instead of many smaller ships?
And to see why manufacturing is easier at smaller scale - consider the smallest and largest scale - I can build a 1 meter toy ship myself, but i can't build an OOCL Hong Kong like ship by myself. By induction this should be true for all levels. The biggest ship looks like this:
In this interview : https://youtu.be/Opnk-cPOM50?list=WL&t=776 - Elon Musk explains that is more efficient to have a big rocket rather than a small one. And gives this example of big trucks and big ships.
But to me doesn't realy makes sense. With smaller size, manufacturing is easier, mass producing is possible, faster and cheaper, and materials can have greater strength for the weight. So much that at smaller size even plastics can be used.. at bigger sizes steels can be used.. and at extra big sizes - like a 10km long ship - nothing can be used since no such materials exist. So how come that bigger is better?
Indeed when we go to extremes then other things play a factor - factors like super small ships are smaller than the waves, and 1km long ships might not fit in port etc.. but outside of such non fundamental limitations, in principle, when we consider the cargo ship case, say this 1 ship in the picture above with 2500 containers vs 10 ships with 250 containers each. Why is it better to go with the 1 big ship in this case? Seems to me is easier to build 10 smaller ships than one which is 10x bigger. Or even better - have 100 ships, each carrying 25 containers. So why am I wrong?
Does the same reasoning applies to trucks.. and why it doesn't apply to rocket engines? Why having 28 small Raptors for Starship is better than 5 big F1 engines like Saturn 5? How to properly think about this?