Air Carrier Obstacle Clearance  Requirements  Chapter Summary  Transport Category Aircraft Performance  For information on air carrier obstacle clearance  requirements consult the Instrument Procedures Handbook,  FAA-H-8083-16 (as revised).  Performance characteristics and capabilities vary greatly  among aircraft. As transport aircraft become more capable  and more complex, most operators find themselves having  to rely increasingly on computerized flight mission planning  systems. These systems may be on board or used during  the planning phase of the flight. Moreover, aircraft weight,  atmospheric conditions, and external environmental factors  can significantly affect aircraft performance. It is essential  that a pilot become intimately familiar with the mission  planning programs, performance characteristics, and  capabilities of the aircraft being flown, as well as all of the  onboard computerized systems in today’s complex aircraft.  The primary source of this information is the AFM/POH.  flaps are down. Next, choose the row corresponding to a  power-off situation. Now, find the correct angle of bank  column, which is 45°. The stall speed is 78 mph, and the  stall speed in knots would be 68 knots.  Performance charts provide valuable information to the pilot.  By using these charts, a pilot can predict the performance of  the aircraft under most flying conditions, providing a better  plan for every flight. The Code of Federal Regulations (CFR)  requires that a pilot be familiar with all information available  prior to any flight. Pilots should use the information to their  advantage as it can only contribute to safety in flight.  Transport category aircraft are certificated under Title 14  of the CFR (14 CFR) part 25. For additional information  concerning transport category airplanes, consult the Airplane  Flying Handbook, FAA-H-8083-3 (as revised).  Transport category helicopters are certificated under 14  CFR part 29.  Figure 11-34.  Stall speed table.  Gross weight  2,750 lb  Level Angle of bank  Gear and flaps up  30° 45° 60°  Power On  MPH 62 67 74 88 knots 54 58 64 76 Off  MPH 75 81 89 106 knots 65 70 77 92 Gear and flaps down  Power On  MPH 54 58 64 76 knots 47 50 56 66 Off  MPH 66 71 78 93 knots 57 62 68 81 11-28 