国外航校私照飞行员地面课Lesson7重点.pptxVIP

Sierra Academy of Aeronautics PPL Ground;V speeds Weight and Balance Some sample problems Performance Introduction Performance Charts;Vso – Stalling speed, landing configuration Vs – Stalling speed, cruise configuration Vx – Best angle of climb Vy – Best rate of climb ;Vrotate – Speed you raise the nose on takeoff Vbest glide – Least descent per distance traveled, engine failure speed Vfe – Maximum flap extended speed Vno – Maximum structural cruising speed Don’t exceed except in smooth air with caution Vne – Never exceed speed;Va – Maneuvering Speed;;Standard Pressure 29.92” Standard Temperature 15?C ;Indicated Altitude Calibrated Altitude Pressure Altitude True Altitude Absolute Altitude;Indicated Altitude Read off altimeter Calibrated Altitude Corrected for instrument error Ignore for single engine cessnas ;Used for performance calculations Height above the Standard Datum Plane Where the pressure is 29.92” and 14.7 psi Two ways to calculate Set an Altimeter to 29.92” Mathematically find a correction factor;(Standard Pressure-Current Alt Setting) x 1,000 If alt. setting: 30.12 Ind. Alt. 3000’ Example (29.92-30.12) x 1,000 = -.20 x 1,000 = -200’ Add -200 feet to indicated altitude 3,000-200=2,800;Pressure altitude corrected for nonstandard temperature How the airplane performs compared to standard day Used to compute performance Calculated On E6-B Table;High density altitude = less performance Propeller less effective Wings produce less lift Engine produces less power ;Pressure Temperature Humidity ;;Pressure Alt 3,000 Temperature 21°C Density Alt ? ;Vertical distance above mean sea level (MSL) Calculated on E6-B Example Temp. 20°C Pressure Alt. 3,700’ Indicated Altitude 3,500’ True Altitude = ? ;Vertical height above the surface (AGL) Absolute Alt. =True Altitude - Terrain Elevation If: True Altitude = 3,500’ Terrain Elevation = 400’ Absolute Alt. = 3,500-400 = 3,100’AGL;Take off Distance Chart Climb Performance Chart Cruise Performance Chart Land