The propeller can turn at 17,000 revolutions per minute. Geoff Wallace, of the Bickley Model Flying Club, said: 'Dartford Heath can get very busy in the air, particularly at weekends. 'It is very ...

Later, another box cutter was found on a US Airways Express propeller plane which had arrived at Boston's Logan Airport from Maine. US Airways said there was a "security concern" for both aircraft ...