Final answer:
The question seems to contain a misunderstanding, as there is no 'push up method' of the RAF rule. It pertains to the historical achievements of the RAF during the Battle of Britain, where they succeeded largely due to experienced pilots from various countries.
Step-by-step explanation:
The push up method mentioned in the question seems to be a misunderstanding. The context provided relates to the achievements of the Royal Air Force (RAF) during the Battle of Britain, rather than a method or rule. The RAF's success in this significant World War II battle stemmed from several factors, including the acquisition of experienced pilots from Nazi-occupied countries such as France and Poland, as well as contributions from pilots from Commonwealth countries like Canada, South Africa, India, and Australia.
By August of that crucial year, RAF pilots were indeed shooting down more German planes than they were losing, which played a part in Hitler's decision to postpone the planned invasion of Britain. The Germans continued to bomb military targets and cities, but the immediate threat of an invasion had receded at that point.