Trolley Accumulator, Mk I

The batteries in aircraft were small so the Trolley Accumulator was used to provide the high power needed to start aircraft engines. The engine was used to recharge the batteries in the trolley.

The rapid refuelling and re-arming of fighter aircraft was vital to RAF success in the Battle of Britain. Groundcrews worked in all weathers, and occasionally under fire, to ensure aircraft were available when needed.