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והפעם - מדוע כדי להישמר מה lee side.THERMAL DRIFT OVER CRESTS
"The same slope may produce both weak and strong thermals. To avoid the risk of getting blown back into the lee it is best to only concentrate on the stronger ones. When thermalling in strong winds it is important to always remain near the windward edge, as dropping out here only causes us to sink back into the thermal, whereas dropping out on the lee side could mean sliding down the backside unable to re-penetrate due to lack of groundspeed. In the diagram the pilot on the right is thermalling near the windward side of the thermal whereas the pilot on the left tried to push back to the high relief too early and now has to cope with a landing in turbulent conditions."