Slammers universe, including all the armored fighting vehicles of Hammer's Regiment, are powered by magnetically contained fusion reactors. These are called "fusion bottles" in the Slammers universe. The high power density of these reactors allow the Slammers to combine high speed, heavy armor, and heavy weapons in their combat vehicles, albeit at extreme expense. Other vehicles of Hammer's Regiment are powered by fuel cells or high capacity batteries which can be recharged in the field from an armored vehicle's fusion reactor. Other vehicles in the Slammers universe are not significantly advanced beyond modern vehicles, except in the specifics of materials and computer systems. One notable difference is that "aircars," similar to the Piasecki Airjeep, are common on many worlds. FTL Starships in the Slammers universe use FTL drives to travel between star systems, or to travel short distances within a system. In the Slammers universe, the FTL drive is called "Transit drive." Distances between planets and star systems are measured in Transit Minutes, referring to the overall time spent in Transit "jumps". Travel by Transit usually involves a series of instantaneous short distance jumps followed by a period of recalculation; the calculations involved in Transit navigation take anywhere from ten to a hundred times as long as the actual Transit process. Distances of seventy Transit Minutes are considered extremely long, for instance. The process by which Transit occurs is not explained in Slammers fiction. However, it appears to have some effect on the human brain as those who travel by Transit are disoriented and fatigued by the jump itself, and suffer severe headaches for a short time afterward. In addition, the distance between two points via Transit is not equivalent to the distance in normal space. Two star systems which are relatively close might be many Transit Minutes apart. There is also a realtime communications system available in the Slammers universe called the Stadtler Communication Device. Its method of operation is unknown, but it is capable of instantaneously communicating to another Stadtler Device at distances up to kiloparsecs away. However, there is one absolute requirement to employ one. "The Stadtler Device could not be used to receive alone. Its principle, whatever it was, required balance: a biological intellect at either node of a communication." The Stadtler Devices are unbelievably expensive, likely non-human in origin, and are generally reserved for the use of the governments of the richest worlds in the