1) Spawn 3 Ship Cores
2) Place a 50 long rod in front of the first core of, eg, Power reactor.
3) for the second place 25 in front, and 25 behind the core
3) for the last, place 40 in front, and 40 behind
4) Now swap between those 3 cores. Notice that the 50 and the 25 ship cores have a rotational potentials that are different, DESPITE being the same size of ship
5) Notice that the 40 2x rod has the same rotation potential as the 50-long rod. Despite there being 30 more blocks on the ship