Mujin Wakusei Survive EP35 - Although We Don't Have Enough Materials

With Shingo designing and Porte giving technical advice while recuperating from his injuries, the children start to build their ship with Pague's help, using the largely intact hull of the Orion for the main body, and searching the forest and ruins for parts and components. However, a disagreement caused by lack of parts is starting to open a rift between Shingo and Porte. Since the gravity control unit they found wouldn't be powerful enough to produce both lift and propulsion for their ship, Shingo comes up with the idea of using sail power for propulsion, but Porte rejects it outright, not willing to ignore centuries of tradition in spaceship construction.

Later, Porte apologizes to Shingo and approves his plans, having realized that Shingo's flexible thinking is better than his own rigid adherence to tradition. While the other children build the ship, Porte, Shingo and Chako work on the ship's wiring and controls. Porte tells Shingo a story from his son - after an argument the two had, the son boarded a newly built colonizing ship, but due to an accident, the ship was lost with all hands. Porte became a mechanic in order to search known space in case his son escaped in an escape pod, but in doing so, saw many amazing sights. Shingo heads for bed, but unnoticed by him, Porte collapses from a pain in his chest.