MIL-DTL-6162 Generators And Starter-Generators, Electrical Direct Current, Nominal 30 Volts, Aircraft General Specification ForThis specification covers the general requirements for aircraft generators and starter-generators for use in 28-volt \(V\) direct current \(DC\) systems. As generators, both type machines are engine driven. The starter-generators, however, also function as engine starters when energized by electric power.