Bit like the ground equip store at Odious for ground power sets, rumour had it meters and feet got mixed up in the planning somewhere.. hence about 10 foot deep and 30 plus foot high lol..
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Base hangar at Brize has/ had a Conway build stand that was supposed to be sunken in a pit, but was erected above ground with the gantry crane just able to clear it, so could never lift an engine into it hence was never used.
sorry for the drift....