112volt aircraft
As I recall, all Comet variants had it as did all Caravelles excluding the last varient I believe. The Bristol Britannia had it, as well as 200volts, frequency wild system for powering the hydraulic pumps The GPU for both the Comet and the Brit had the same output capacity but the Brit took more amps as the very large prop took some turning, especially on a cold day!
Other military bomber types using 112volt were the Vulcan, Mk 1 and 1A only and the Victors Mk1 only.
The use of 112 volts was to start both jet and turbo prop engines thus reducing the load that a 28volt system would have to bear doing the same job. It also powered 115v single phase systems via a rotary invertor.
Batteries were a nightmare to change, especially the Brit which had two banks of 4 which in the civil version you could switch over via a mighty big switch in the cockpit but on the military version you had to physically change the back row to the front and move the front row to the back if you wanted to change the power source. All for the sake of not fitting the big switch!! Happy days.