9) This mean that, for every ton of hydrogen fusion fuel, it can support up to 45.5 tons of ship weight.
The return journey concept :
1) For the ship return journey, we expected the ship will travel at speed of light too, but this required a propeller station at the other side too.
2) To solve this problem, we need to find a planet that is having water.
3) Then the ship, bringing along with construction materials, propel at speed of light to this planet and start to build the propeller over there.
4) But the return journey will be at 1% speed of light.
5) Until the propeller is finished constructed, then both sides of the home and the planet ships will travel at speed of light back and forth.
6) The other way is for the ship to wait for other ships to come to continue for the propeller construction.
7) When this propeller is in operation, all the ships at this planet will able to travel back home at speed of light.