Aircraft transformers — Small and light

The necessity for lightweight and small-size aircraft transformers is evident, since any reduction in space and weight will result in larger capacities for fuel and bomb loads. Various types of transformers have been developed recently, such as, three-phase to single-phase, single-phase to three-phase, two-phase to three-phase, three-phase to two-phase, combination a-c to d-c transformer-rectifier self-regulated units, miniature-instrument type, and a line of general-purpose aircraft units with kilovolt-ampere ratings ranging from 100 volt-amperes to 5 kilovolt-amperes, with weights ranging from 0.8 pound to 9.5 pounds and operating at ultimate temperatures of 225 degrees centigrade. Included are vibrator-inverter transformers, voltage stabilizers, and high-voltage and low-voltage booster ignition coils.