FH.VIII.B.K1

From the FAA library

• Helicopter Flying Handbookp. 7-6
  Chapter 7: Helicopter Performance › Performance Charts › Sample Hover Problem 2

  takeoff location with a specific gross weight does not ensure the same performance at the landing point. If the destination point is at a higher density altitude because of higher elevation, temperature, and/or relative humidity, more power is required ... knowing the temperature and wind conditions, using the performance charts in the helicopter flight manual, and making certain power checks during hover and in flight prior to commencing the approach and landing. For helicopters with dual engines, performance charts provide…

• Helicopter Flying Handbookp. 7-6
  Chapter 7: Helicopter Performance › Sample Hover Problem 3 › Climb Performance

  outside air temperature, 0 °C. From that point, move down to 4,250 pounds gross weight and then move left to 5-foot skid height. Drop down to read 66 percent torque required to hover. Climb Performance Figure ... performance also affect climb performance. In addition, turbulent air, pilot techniques, and overall condition of the helicopter can cause climb performance to vary. A helicopter flown at the best rate-of-climb speed (VY) obtains the greatest gain in altitude…

• Helicopter Flying Handbookp. 10-2
  Chapter 10: Advanced Flight Maneuvers › Maximum Performance Takeoff

  capabilities and limitations of the equipment. Also consider the wind velocity, temperature, density altitude, gross weight, center of gravity (CG) location, and other factors affecting pilot technique and the performance of the helicopter. To accomplish this type of takeoff safely ... there must be enough power to hover out of ground effect (OGE) in order to prevent the helicopter from sinking back to the surface after becoming airborne. A hover power check can be used to determine if there is sufficient…

• Helicopter Flying Handbookp. 7-2
  Chapter 7: Helicopter Performance › Factors Affecting Performance › Moisture (Humidity)

  weight, and wind. The Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25 (as revised), discusses these factors in great detail. Moisture (Humidity) Humidity alone is usually not considered an important factor in calculating density altitude and helicopter performance ... effects of humidity on density altitude, but some manufacturers include charts with 80 percent relative humidity columns as additional information. There appears to be an approximately 3–4 percent reduction in performance compared to dry air at the same altitude…

• Pilot's Handbook of Aeronautical Knowledgep. 10-6
  Chapter 10: Weight and Balance › Control › Weight and Balance Restrictions

  that affect takeoff and climb performance, such as high elevations, high temperatures, and high humidity (high density altitudes), may require a reduction in weight before flight is attempted. Other factors to consider when computing weight and balance distribution prior ... takeoff are runway length, runway surface, runway slope, surface wind, and the presence of obstacles. These factors may require a reduction in or redistribution of weight prior to flight. Figure 10-4. Establishing a balance. Some aircraft are designed…

• Aeronautical Information Manualp. 7-1-46
  Chapter 7. Safety of Flight › Section 1. Meteorology › 7-1-18. Pilot Weather Reports (PIREPs)

  clear, few, scattered, broken, or overcast) 8. Weather /WX Flight visibility, precipitation, restrictions to visibility, etc. 9. Temperature /TA Degrees Celsius 10. Wind /WV Direction in degrees magnetic north and speed in knots 11. Turbulence /TB See AIM paragraph ... Airframe Icing a. The effects of ice on aircraft are cumulative-thrust is reduced, drag increases, lift lessens, and weight increases. The results are an increase in stall speed and a deterioration of aircraft performance. In extreme cases…