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Rh eliminate accidents in the air. With perfected motors the dread of forced landings will be for­gotten, and with more fields, at least in the popu­lous areas, “repair” landings would be an added safeguard.

Eliminating many of the expected sensations of doesn’t mean that none are to be anticipated or that those left are only pleasant. There are poor days for flying as well as good ones. Just as in yachting, weather plays an important part, and sometimes entirely prevents a trip. Even ocean liners are occasionally held over in port to avoid a storm, or are prevented from making a scheduled landing because of adverse conditions. Trains, despite the hundred years since railroads began, are still stalled by washouts and snow. In due time, planes will doubtless become as reliable as these older forms of transportation and learn to overcome their particular weather hazards as well.

The choppy days at sea have a counterpart in what flyers call “bumpy” air over land. Air is liquid flow and where obstructions occur there will be eddies. For instance, imagine wind blowing directly toward a clump of trees, or coming in sud­den contact with a cliff or steep mountain. Water is thrown up when it strikes against a rock and so is a stream of air diverted upward by an object in its way. Encountering such a condition, a plane gets a “wallop”—is tossed up and buffeted as it rolls over the wave.

There are bumps, too, from sources other than