Gliding: A Handbook on Soaring Flight

accurate aerotow aileron drag air brakes airfield airflow airspeed indicator altimeter angle of attack angle of bank approach area of lift artificial horizon barograph base leg best speeds cable breaks cause circuit cloud base cockpit compass correct cross-country flights cumulus cloud damage difficult direction distance dive effect errors feet field final turn flown glider pilot gliding angle hill lift increase keep landing area launch lee waves loss of height miles motor glider movement normal nose oxygen pin-point pitot position possible powered aircraft pressure rate of climb rate of descent rate of sink rate of turn recovery reduced release result rising air rope rudder sailplanes sideslip sinking air skid slip indicator slope soaring conditions soaring flights solo speed to fly spin stalling speed steep stick straight track tube turbulent turn and slip unless usually variometer wave winch wind gradient wing tip yawing