Trolley Accumulators

One Trolley Accumulator (upper picture) is believed to be the older, has a manual towing handle and pneumatic tyres

The other Trolley Accumulator (lower right picture) is believed to be the newer.  It has a towing handle so that it can be towed behind a tractor and solid tyres. 

Each Trolley Accumulator has a metal framed wooden box containing lead-acid cells with a small petrol engine and generator on the top ((lower left picture).  The cable connects to the battery socket on the aircraft, 

31.jpg
20201018_151810.jpg
20210728_095818.jpg