rebuilds
Next time you hear the delightful hiss of a rotary at Old Warden just remember that they need an overhaul after 5 hours or so.
A trip behind the scenes is an Alladins cave of boxes marked '110 leRhone' etc.
These cores are more than 80 years old. Anybody priveledged to see the innards of one of the old rotaries can only marvel at the craftsmanship. They are jewels.
HP