A suite of electrical propulsion systems and complementary parts, both old-school and sci-fi, for your early-game and late-game airplane/spaceplane needs. A great addition to your part inventory if you love to mix spaceplanes and planet packs.
Forget LiquidFuel and solar panels (while flying). Thor Tech brings:
Propfan and turbofan engines that work in all atmosphere.
Inline windmill turbines (early-game) that enable planes to c