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Posts
- Category: Helicopter Performance, Stability, and Control (continued)
- VERTICAL CLIMB
- Drag Estimate for Example Helicopter
- Total Parasite Drag
- Miscellaneous Drag
- Bluff Body Drag
- PARASITE DRAG IN FORWARD FLIGHT
- TAIL ROTOR-FIN INTERFERENCE IN HOVER
- VERTICAL DRAG IN HOVER
- Power Required Losses
- Engine Installation Losses
- POWER LOSSES
- Performance Analysis
- CORRELATION WITH TEST RESULTS
- Use of the Charts
- Using the Computer Program
- Yawed Flow and Unsteady Aerodynamics
- Basic Equations
- Trim Conditions Based on Elimination off Assumptions
- Three-Term Drag Polar
- Tip Loss and Root Cutout
- Autorotation in Forward Flight
- Climbs and Descents
- CALCULATION OF TRIM CONDITIONS
- Closed-Form Equations for the Tail Rotor
- Compressibility Correction and Compressibility Tip Relief
- Closed-Form Integration for H-Force
- Closed-Form Integration for Torque
- Correlation of Flapping with Test Results
- Coning in Forward Flight
- Trim Control Angles
- Average Blade Element Lift Coefficient
- Closed-Form Integration for Thrust
- Angle of Attack of the Blade Element
- Cyclic Pitch
- Blade Flapping
- . Tangential Velocity
- Analysis of Climbs and Autorotafion by the Energy Method
- Ground Effect in Forward Flight
- Effect of Density Altitude
- Tail Rotor Power
- . Profile Power
- Induced Power
- Induced Velocities in Forward Flight
- Aerodynamics of forward fliglit
- EFFECT OF RAPID PITCH CHANGES
- RATE OF DESCENT IN VERTICAL AUTOROTATION
- CHARACTERISTICS OF THE VORTEX RING STATE
- COLLECTIVE PITCH REQUIRED
- POWER REQUIRED IN A VERTICAL CLIMB
- CONDITIONS AT THE BLADE ELEMENT
- Vortex Ring State
- Aerodynamics of Vertical flight
- HOW TO’S
- EXAMPLE HELICOPTER CALCULATIONS
- Adjustment of Existing Whirl Tower Data
- Hover Charts
- COMBINED MOMENTUM AND BLADE ELEMENT THEORY WITH EMPIRICAL CORRECTIONS
- METHODS FOR ESTIMATING HOVER PERFORMANCE
- Radial Flow
- Stall and Drag Divergence
- Airfoil Data
- Tip Vortex Interference
- Rotation of the Wake
- Effect of Taper
- Dynamic Twist
- Nonideal Twist
- Calculation of Nonuniform Induced Velocity Distribution
- Tip Loss and Root Loss
- Coning of a Rotor in Hover
- Maximum Figure of Merit
- Rotor Performance for Ideal Twist
- Determination of the Blade Drag Coefficient
- Integration for Power
- The Torque on a Blade Element
- Relationship between Thrust and Pitch
- Nondimensional Coefficients
- Integration for Thrust
- BLADE ELEMENT METHOD
- First Approximation to the Power Required to Hover
- Figure of Merit
- Ideal Power
- Effect of Induced Velocities
- Induced Velocities
- Aerodynamics of Hovering Flight
- Helicopter Performance, Stability, and Control
- Category: Helicopter Test and Evaluation
- AFCS failures
- Failure cueing
- Engine failures in multi-engine helicopters
- Engine-off landing tests
- Entries into autorotation with delay times
- Recovery to powered flight
- Total loss of power
- Applying a control parameter
- Reacting to the failure
- Planning for failures
- Safety of operation of autopilot
- Autopilot performance
- Lateral and directional static stability
- Longitudinal static stability