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Without the spring trimming there would be no pressure required to change speeds or to pull out of dives, and the controls would be very light indeed.
The wings on Badger's biplane collapsed when he tried to pull out of dive too late, and Johnstone crashed into Lake Michigan after his engine failed.
Pilots first complained about the effects of gravitational acceleration during World War I when some suffered vision impairment and occasional loss of consciousness when pulling out of dives.
He had been on one training flight on 31 August to learn how to dive bomb and Mosquito crews knew they had to practise regularly, particularly in pulling out of dives.
The RAF demonstrated the importance of speed and maneuverability in the Battle of Britain (1940), when its fast Spitfire and Hawker Hurricane fighters easily riddled the clumsy Stukas as they were pulling out of dives.