Page 5 Advertisements Column 7

Wanganui Chronicle, Volume LXVI, Issue 17571, 15 May 1919, Page 5

great heights, though it may l)e said that actual tests with captured German machines have proved the Allies to be ahead of the Central Powers in this direction —a fact which was demonstrated in a general but less precise manner even more conclusively in the daily struggle at the front. It is the conibin.ri.tion of speed and climbing power together which constitutes a good performance in an aeroplane, and one merit is of small use without the other. It was ahv.ays a simple matter to design a machine either for fast flying or high climbing speed; but it was not until an Englishman conceived the brilliant , idea of an arrangement whereby the pilot could j while in flight alter the angle at which j tho tail plane " attacked" the air, that a revolutionary development in combining the two qualities was effected. At very great heights some pilots experience a strain on the breathing ami heart, and oxygen is sometimes employed to reinforce the impoverished air. At • 20,000 feet an aeroplane is practically invisible # to the human eye from the ground; and the aviator can generally see nothing around and below him but ban*ks of cloud. A weird feeling! WOLFE'S a beneficial effect upon tne kidneys.