AT the outset of his article on high‐lift aids in this issue MR NONWEILER recalls that so long ago as 1937 we expressed bewilderment at the number and variety of such devices which then existed. He goes on gently to suggest that the progress of years can only have added to our embarrassment; as it assuredly has. Indeed, it was because of the ever‐growing complexity of what we usually think of as ‘slottery and flappery’ in the modern aeroplane that we conceived the idea of an article dealing with the subject and eventually wrote to MR NONWEILER to invite him to prepare it for us.
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