The ability to make your vehicle move is, one would think, central to the idea of a vehicle! For each environment in which your vehicle can operate, select at least one motive system. Aircraft might also want to look at Lift Systems.

First available at TR-1, this includes a variety of propellors and jet engines. Some spacecraft engines can also be found here, as they are equally capable of propelling an aircraft.

Some of these propulsion systems generate their own power, such as rockets or jet engines. Others, like propellors, will require an installed powerplant.

Primarily intended for spacecraft, this category covers five different technologies for FTL travel. Of course, if your setting uses some sort of external FTL device—such as a stargate—then you don't need to install one of these.

All of these will require installed powerplants, but the nature of those plants varies wildly from drive to drive.

This includes wheels, tracks, skis and leg drivetrains, as well as combinations of these. All of these will require a powerplant to be installed.

Static lift can cancel out the mass of a vehicle. These range from gas bags to lift fans to wings in ground effect to super-science solutions such as contragravity or levitation. In addition, some air motive systems, such as helicopters, tilt-rotors and ornithopters, provide some lift as well.

This includes a variety of reaction drives, as well as the science-fictional reactionless and gravity drives. Most of the latter can also be used as Air Propulsion.

Some of these engines—most notably rockets—will generate all the power they need internally. Most of them, however, will require you to install a powerplant.

This category includes a number of ways to propel a surface ship, some of which are also suitable for a submarine.

With the exception of sails, you will need to install a powerplant to operate pretty much all of these propulsion options.