founded in his memory by friends who admired his powers and loved the man.
But it is not only in the structure of the aeroplane that science has done its part. The engine brought problems of the highest complexity, which are being solved by patient application and earnest endeavour. Large powers are needed; the various parts move at great speed, hence strength is essential, but the weight must be kept down; at the same time endurance is necessary; risk of untimely failure must be reduced and the pilot made as secure as possible. Here the metallurgist has been at work producing alloys little heavier than aluminium yet comparable in strength with steel and suitable for many new demands, and in this field Dr Rosenhain, of the National Physical Laboratory, has arrived at most important results.
Or consider the instruments the pilot needs
