The Radioisotope Thermoelectric Generator, abbreviated as RTG, is a part that is only found in blueprint editing by naming a part
Placeholder RTG or in saved blueprints created before 1.5. It formerly generates 0.5 units of power and can be used to power up space probes and rovers.
Advantages and disadvantages
RTGs are better than other electric generators in rovers, because they're more compact (in 2×1 units that don't need to be extended to generate power) and durable if landed on, and can lower the rover's center of mass (making it more difficult to flip over).
In propelled spaceflight, solar panels are more efficient because of their higher power generation per tonne.
RTGs may be desirable in space stations, because of their compactness, but they're heavier per-watt, meaning more rocket journeys are necessary (carrying RTGs as payloads) for the same benefit as solar panels.
- The RTG has the ionizing radiation hazard symbol on it. In 1.5, it is removed.
- It is a grey block that occupies a perimeter of 2 units.
- In real life, RTGs are used to power satellites and space probes, similarly to SFS.
- Real RTGs use the decay of radioactive material such as 238Pu (plutonium-238) or any radioactive isotope to generate power. The output varies, depending on the isotope used, but slows down as less of the material remains, the intervals between halvings being called the half-life. However, RTGs in SFS have no half-life, and produce constant electricity.
- The RTG can be formerly found in the Electric section in the building space. However, due to the electricity rework, it disappeared from the parts menu and only then and now accessed in blueprint edited rockets, and is now a gray block that has no function.