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Archive / FAA Rotorcraft Flying Handbook / FAA Rotorcraft Flying Handbook: Chapter 7 — Weight and Balance

Chapter 7 — Weight and Balance

Chapter 7 — Weight and Balance

FAA-H-8083-21 (2000)

Powerplant Limitations.......................................6-2

Weight and Loading Distribution .......................6-2

Flight Limitations ...............................................6-3

Placards...............................................................6-3

Emergency Procedures ............................................6-3

Normal Procedures..................................................6-3

Performance.............................................................6-3

Weight and Balance.................................................6-4

Aircraft and Systems Description ...........................6-4

Handling, Servicing, and Maintenance ...................6-4

Supplements ............................................................6-4

Safety and Operational Tips....................................6-4

Chapter 7—Weight and Balance

Weight......................................................................7-1

Basic Empty Weight ...........................................7-1

Useful Load ........................................................7-1

Payload................................................................7-1

Gross Weight.......................................................7-1

Maximum Gross Weight.....................................7-1

Weight Limitations .............................................7-1

Determining Empty Weight ................................7-1

Balance ....................................................................7-2

Center of Gravity ................................................7-2

CG Forward of Forward Limit.......................7-2

CG Aft of Aft Limit .......................................7-2

Lateral Balance ...................................................7-3

Weight and Balance Calculations............................7-3

Reference Datum ................................................7-3

Arm .....................................................................7-4

Moment...............................................................7-4

Center of Gravity Computation ..........................7-4

Weight and Balance Methods..................................7-4

Computational Method .......................................7-4

Loading Chart Method........................................7-5

Sample Problem 1 ..........................................7-5

Sample Problem 2 ..........................................7-5

Sample Problem 3 ..........................................7-6

Combination Method ..........................................7-6

Calculating Lateral CG.......................................7-7

Chapter 8—Performance

Factors Affecting Performance................................8-1

Density Altitude ..................................................8-1

Atmospheric Pressure .........................................8-1

Altitude ...............................................................8-2

Temperature ........................................................8-2

Moisture (Humidity)...........................................8-2

High and Low Density Altitude Conditions.......8-2

Weight .................................................................8-2

Winds ..................................................................8-2

Performance Charts .................................................8-3

Hovering Performance........................................8-3

Sample Problem 1 ..........................................8-4

Sample Problem 2 ..........................................8-4

Takeoff Performance...........................................8-5

Sample Problem 3 ..........................................8-5

Climb Performance.............................................8-5

Sample Problem 4 ..........................................8-6

Chapter 9—Basic Flight Maneuvers

Preflight ...................................................................9-1

Minimum Equipment Lists (MELS) and

Operations With Inoperative Equipment ............9-1

Engine Start and Rotor Engagement.......................9-2

Rotor Safety Considerations...............................9-2

Safety In and Around Helicopters ......................9-3

Ramp Attendants and Aircraft

Servicing Personnel........................................9-3

Aircraft Servicing...........................................9-3

External-Load Riggers ...................................9-3

Pilot at the Flight Controls.............................9-3

External-Load Hookup Personnel..................9-3

Passengers ......................................................9-4

Vertical Takeoff to a Hover .....................................9-5

Technique............................................................9-5

Common Errors ..................................................9-5

Hovering..................................................................9-5

Technique............................................................9-5

Common Errors ..................................................9-5

Hovering Turn .........................................................9-6

Technique............................................................9-6

Common Errors ..................................................9-7

Hovering—Forward Flight......................................9-7

Technique............................................................9-7

Common Errors ..................................................9-7

Hovering—Sideward Flight ....................................9-7

Technique............................................................9-7

Common Errors ..................................................9-8

Hovering—Rearward Flight....................................9-8

Technique............................................................9-8

Common Errors ..................................................9-8

Taxiing.....................................................................9-8

Hover Taxi ..........................................................9-9

Air Taxi ...............................................................9-9

Technique .......................................................9-9

Common Errors..............................................9-9

Surface Taxi ........................................................9-9

Technique .......................................................9-9

Common Errors............................................9-10

Normal Takeoff From a Hover..............................9-10

Technique..........................................................9-10

Common Errors ................................................9-10

Normal Takeoff From the Surface.........................9-11

Technique ..........................................................9-11

Common Errors.................................................9-11

Crosswind Considerations

During Takeoffs ................................................9-11

Straight-and-Level Flight ......................................9-12

Technique..........................................................9-12

Common Errors ................................................9-12

Turns......................................................................9-12

Technique..........................................................9-12

Slips ..................................................................9-13

Skids..................................................................9-13

Common Errors ................................................9-13

Normal Climb........................................................9-13

Technique..........................................................9-13

Common Errors ................................................9-14

Normal Descent.....................................................9-14

Technique..........................................................9-14

Common Errors ................................................9-14

Ground Reference Maneuvers...............................9-14

Rectangular Course...........................................9-14

S-Turns..............................................................9-16

Turns Around a Point........................................9-17

Common Errors During Ground

Reference Maneuvers .......................................9-18

Traffic Patterns ......................................................9-18

Approaches............................................................9-19

Normal Approach to a Hover ...........................9-19

Technique .....................................................9-19

Common Errors............................................9-19

Normal Approach to the Surface ......................9-20

Technique .....................................................9-20

Common Errors............................................9-20

Crosswind During Approaches.........................9-20

Go-Around.............................................................9-20

After Landing and Securing..................................9-20

Noise Abatement Procedures ................................9-20

Chapter 10—Advanced Maneuvers

Reconnaissance Procedures...................................10-1

High Reconnaissance........................................10-1

Low Reconnaissance ........................................10-1

Ground Reconnaissance....................................10-1

Maximum Performance Takeoff ...........................10-2

Technique..........................................................10-2

Common Errors ................................................10-2

Running/Rolling Takeoff.......................................10-2

Technique..........................................................10-3

Common Errors ................................................10-3

Rapid Deceleration (Quick Stop)..........................10-3

Technique..........................................................10-3

Common Errors ................................................10-4

Steep Approach to a Hover ...................................10-4

Technique..........................................................10-4

Common Errors ................................................10-5

Shallow Approach and Running/Roll-On

Landing..................................................................10-5

Technique..........................................................10-5

Common Errors ................................................10-5

Slope Operations ...................................................10-6

Slope Landing...................................................10-6

Technique.....................................................10-6

Common Errors............................................10-6

Slope Takeoff ....................................................10-6

Technique.....................................................10-7

Common Errors............................................10-7

Confined Area Operations.....................................10-7

Approach...........................................................10-7

Takeoff ..............................................................10-8

Common Errors ................................................10-8

Pinnacle and Ridgeline Operations .......................10-8

Approach and Landing .....................................10-8

Takeoff ..............................................................10-9

Common Errors ................................................10-9

Chapter 11—Helicopter Emergencies

Autorotation...........................................................11-1

Straight-in Autorotation ....................................11-2

Technique .....................................................11-2

Common Errors............................................11-3

Power Recovery From Practice

Autorotation ......................................................11-3

Technique .....................................................11-3

Common Errors............................................11-3

Autorotation With Turns ...................................11-3

Technique .....................................................11-3

Power Failure in a Hover..................................11-4

Technique .....................................................11-4

Common Errors............................................11-4

Height/Velocity Diagram.......................................11-4

The Effect of Weight Versus

Density Altitude ................................................11-5

V ortex Ring State (Settling With Power) ..............11-5

Retreating Blade Stall............................................11-6

Ground Resonance.................................................11-7

Dynamic Rollover .................................................11-7

Critical Conditions............................................11-8

Cyclic Trim .......................................................11-8

Normal Takeoffs and Landings.........................11-8

Slope Takeoffs and Landings............................11-8

Use of Collective ..............................................11-9

Precautions........................................................11-9

Low G Conditions and Mast Bumping ...............11-10

Low Rotor RPM and Blade Stall ........................11-10

Recovery From Low Rotor RPM........................11-10

Systems Malfunctions..........................................11-11

Antitorque System Failure ..............................11-11

Landing—Stuck Left Pedal........................11-11

Landing—Stuck Neutral or

Right Pedal .................................................11-12

Unanticipated Yaw / Loss of Tail Rotor

Effectiveness (LTE) ........................................11-12

Main Rotor Disc Interference

(285-315°) .......................................................11-12

Weathercock Stability

(120-240°) .......................................................11-13

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