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PREFLIGHT PREPARATION FOR SOARING
SOARING WEATHER ANALYSIS
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adiabatic lapse rate aircraft airport airspeed airspeed indicator airworthiness altitude aviation badge barograph BILL HOLBROOK chapter circle climb rate cloud base competition pilots Competitive Soaring contest country soaring pilot course crew crewman cross country flight cross country soaring cumulus clouds distance flights downwind Echo Delta equipment experienced pilots feet fiberglass field FIGURE final glide finding lift flown flying forecast George Moffat glider goal and return ground height band high performance important in-flight decision instruments landing mental picture miles Official Observer Open Class parachute Peravia plane polar practice radio reference chamber ridge lift ridge soaring rising air rule sailplane pilot Schempp-Hirth Schweizer selection ship sink soaring cross country soaring weather speed sport Standard Class surface winds T-tail takeoff task terrain thermal tion trailer triangle turnpoint upwind usually vario variometer watch wave winds aloft wing yaw string