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Aviation History
1954
1954 - 1161.PDF
23 April 1954 519 THE CAULDRON AND THE BANNER EVEN if only as a reminder that nature can produce clouds just as strange and fascinating as those of present-day nuclear physicists—but with somewhat less unpleasant results—the two aerial pictures on this page are worthy of note. The upper one, taken from a U.S.A.F. RB-29, shows the circular edge of the "eye" of a tropical typhoon encountered near the Philippine Islands. While turbulence is extremely violent inside the towering nimbo-stratus, the centre core (often almost cloud-free) can consist of surprisingly stable air. The lenticular billow cloud seen below was photographed near Middlemarch, South Island, New Zealand, and owes its unusual and striking appearance to a combina tion of a typical lee wave cloud and pre-frontal condi tions. In spite of the remarkable impression of motion, the cloud itself is stationary, the lenticular structure and distinct striations indicating that the wind is actually blowing at high velocity "through" the cloud formation.
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