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HOVERCRAFT PRINCIPLE was demonstrated by Christopher Cockerell
using two cans, one inside the other, with air blown between their
sides to provide the ‘air cushion’ (top left). A more sophisticated
model (top, right) was demonstrated to British experts in 1956.
The rst of the Mountbatten Class hovercraft, the Princess M m‘garel,
was launehed only 12 years later
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