Hover Taxi

Objective

Upon completion of this lesson, the CFI candidate will demonstrate the ability to effectively teach hover taxi procedures and techniques to helicopter students. The candidate will explain and demonstrate proper execution of hover taxi maneuvers including forward, sideward, rearward movement, and hovering turns while maintaining precise aircraft control and situational awareness. This lesson addresses ACS task HI.VIII.B and prepares the CFI candidate to teach students safe hover taxi operations at towered and non-towered airports/heliports.

Content

Introduction to Hover Taxi

Hover taxi is the controlled movement of a helicopter at hover height over a surface, typically used to reposition the aircraft without landing. Think of it as “walking on air” - just like walking requires balance, coordination, and awareness of your surroundings, hover taxi demands precise control inputs and constant situational awareness.

Airport/Heliport Information Resources (K1)

Effective hover taxi begins with thorough preflight planning using current aeronautical references:

Chart Supplement: Provides detailed airport information including heliport locations, dimensions, surface types, and special procedures. Look for helicopter-specific notes such as preferred hover taxi routes and restricted areas.

Airport Diagrams: Essential for understanding taxiway layouts, runway crossings, and hazard areas. Study the diagram before flight to identify safe hover taxi routes and potential conflict points.

NOTAMs: Critical for identifying temporary hazards, construction areas, closed taxiways, or special procedures that could affect hover taxi operations.

Hover Taxi Instructions and Clearances (K2)

At towered airports, hover taxi operations require specific clearances:

• “Helicopter 123AB, taxi to Runway 09 via Alpha, remain in helicopter flight pattern”
• “Helicopter 456CD, hover taxi to the cargo ramp, avoid the fuel truck on taxiway Bravo”

Limitations: Always clarify altitude restrictions, route limitations, and any special instructions. If unsure about any clearance, request clarification immediately.

Airport Signs, Markings, and Lighting (K3)

Understanding ground references is crucial for hover taxi:

Taxiway Markings: Yellow lines indicate taxiway centerlines and edges. Unlike fixed-wing aircraft, helicopters can hover taxi over grass or unpaved areas when authorized.

Runway Markings: White markings indicate runway surfaces - never hover taxi over active runways without specific clearance.

Signs: Mandatory instruction signs (red background, white text) indicate areas requiring ATC clearance. Location signs (yellow background, black text) provide position information.

Lighting: Blue taxiway edge lights, green centerline lights, and amber runway guard lights help maintain orientation during low visibility conditions.

Visual Wind Indicators (K4)

Wind awareness is critical during hover taxi operations:

• Windsocks: Provide real-time wind direction and approximate velocity
• Tetrahedron: Points into the wind at non-towered airports
• Smoke, flags, vegetation: Natural wind indicators
• AWOS/ASOS: Automated weather reporting systems

Remember that wind conditions can vary significantly across the airport due to buildings and terrain effects.

Aircraft Lighting (K5)

Proper lighting enhances safety and visibility:

• Navigation lights: Required during hover taxi operations
• Anti-collision lights: Strobe or rotating beacon - use as appropriate for conditions
• Landing light: Recommended to increase visibility to other aircraft and ground personnel
• Taxi light: If equipped, helps illuminate the hover taxi path

Pilot Activities During Hover Taxi (K6)

Effective hover taxi requires constant pilot vigilance:

1. Maintain aircraft control: Smooth, precise control inputs
2. Monitor engine parameters: Watch for overtorque or overtemperature conditions
3. Scan for hazards: Other aircraft, vehicles, personnel, obstacles
4. Maintain radio communications: Monitor ATC frequencies and respond promptly
5. Track position: Use airport diagram to maintain situational awareness

Safe Hover Taxi Procedures (K7)

At Towered Airports:

• Obtain clearance before hover taxi
• Maintain radio contact with ground control
• Follow assigned routes and altitudes
• Request progressive taxi instructions if needed

At Non-Towered Airports:

• Monitor CTAF for traffic
• Announce hover taxi intentions
• Maintain visual separation from other aircraft
• Use standard traffic patterns when applicable

Runway Entry and Crossing Procedures (K8)

Runway operations require heightened awareness:

1. Never enter or cross runways without clearance at towered airports
2. Monitor runway status - is it active or closed?
3. Scan final approach course before crossing
4. Complete crossing expeditiously - don’t hover over runway surfaces unnecessarily
5. Confirm runway is clear in both directions before crossing

At non-towered airports, self-announce intentions: “Podunk Traffic, Helicopter 123AB crossing Runway 18 at midfield, Podunk.”

Height/Velocity Considerations (K9)

The Height/Velocity diagram creates critical limitations during hover taxi:

• Stay within safe operating envelope: Typically below 10 feet AGL for hover taxi
• Avoid the “dead man’s curve”: The shaded area where safe autorotation is not possible
• Consider density altitude effects: Higher altitudes reduce performance margins
• Plan escape routes: Always have options if engine failure occurs

Aircraft Operating Limitations (K10)

Hover taxi operations must respect aircraft limitations:

• Maximum gross weight: Affects hover performance and H/V envelope
• Center of gravity limits: Critical for control effectiveness
• Torque limitations: Monitor to prevent overtorque conditions
• Temperature limits: Watch for overheating during prolonged hover operations
• Fuel limitations: Consider fuel burn during extended hover taxi operations

Risk Management Elements

Distractions and Situational Awareness (R1): Hover taxi requires constant attention to aircraft control and environmental hazards. Develop a systematic scan pattern: instruments, flight controls, outside hazards, position awareness.

Reduced Visibility Operations (R2): Night or low visibility hover taxi significantly increases risk. Use aircraft lighting effectively, reduce taxi speed, and consider requesting progressive taxi instructions from ATC.

Runway Incursion Prevention (R3): The leading cause of serious aviation accidents. Always verify clearances, maintain radio contact, and never assume runway status. When in doubt, ask ATC for clarification.

Traffic and Hazard Awareness (R4): Helicopters share airspace with fixed-wing aircraft, ground vehicles, and personnel. Maintain constant vigilance and remember that helicopters can appear suddenly due to their maneuverability.

Downwash Effects (R5): Main rotor downwash creates significant hazards including:

• Foreign object debris (FOD) that can damage aircraft or injure personnel
• Loss of control for nearby aircraft or ground personnel
• Damage to parked aircraft or ground equipment

Rotor Strike Hazards (R6): During hover taxi, maintain awareness of:

• Main rotor clearance: Buildings, vehicles, other aircraft, trees
• Tail rotor clearance: Personnel, vehicles, signs, lights
• Tail strike potential: During turns or on sloped surfaces

Height/Velocity Awareness (R7): Continuously assess your position relative to the H/V envelope. If outside safe parameters, either reduce altitude or increase airspeed to reach a safer operating condition.

Confirmation Bias (R8): Don’t hear what you expect to hear. Read back all clearances verbatim and ask for clarification when uncertain. Confirmation bias can lead to runway incursions and other serious incidents.

Common Errors (K11)

1. Poor control coordination: Jerky or uncoordinated control inputs
2. Altitude deviations: Failing to maintain recommended hover height
3. Inadequate hazard scanning: Missing other aircraft, vehicles, or obstacles
4. Poor radio discipline: Inadequate communication with ATC or other traffic
5. Runway incursions: Entering runways without clearance
6. Excessive power demands: Operating outside aircraft limitations
7. Loss of position awareness: Becoming disoriented on airport surface

Teaching Methodology

When teaching hover taxi, use progressive instruction:

1. Ground instruction: Review procedures, hazards, and limitations
2. Demonstration: Show proper techniques with narration
3. Guided practice: Student performs with instructor coaching
4. Solo practice: Student demonstrates proficiency independently

Use the building-block approach - master basic hovering before attempting complex hover taxi maneuvers.

Schedule

Equipment

Required References

• FAA-H-8083-4 Helicopter Instructor’s Handbook
• FAA-H-8083-21 Helicopter Flying Handbook
• FAA-S-ACS-29 Helicopter Instructor Practical Test Standards
• Current airport diagram and Chart Supplement
• Aircraft Flight Manual/Pilot’s Operating Handbook

Materials and Aids

• Airport diagram (current edition)
• Height/Velocity diagram for training aircraft
• Whiteboard or teaching aids for ground instruction
• Radio communications examples
• Current NOTAMs for training airport
• Calculator for density altitude computations

Aircraft Requirements

• Dual-control helicopter with functioning radios
• Current airworthiness certificates and documentation
• Adequate fuel for lesson completion
• Functioning navigation and anti-collision lights

Instructor Actions

The CFI candidate will demonstrate the ability to teach hover taxi by:

1. Explaining airport information resources - Show how to interpret Chart Supplement entries, airport diagrams, and NOTAMs relevant to helicopter operations

2. Demonstrating proper clearance procedures - Role-play radio communications for both towered and non-towered airports, emphasizing read-back requirements

3. Teaching hazard recognition - Point out signs, markings, and lighting while explaining their significance to hover taxi operations

4. Explaining wind assessment - Demonstrate how to interpret windsocks and other wind indicators, relating wind conditions to hover taxi technique

5. Demonstrating hover taxi techniques - Perform smooth, precise hover taxi maneuvers including:

   • Forward hover taxi maintaining centerline tracking
   • Sideward movement for obstacle avoidance
   • Rearward movement when required
   • Hovering turns with proper pivot point control
   • 360-degree turns to specified headings

6. Teaching risk management - Identify and explain potential hazards including downwash effects, rotor clearances, and H/V considerations

7. Analyzing common errors - Demonstrate incorrect techniques and explain proper corrections

8. Providing effective critique - Use positive reinforcement while addressing areas needing improvement

Student Actions

The evaluator, acting as a student, will:

1. Ask relevant questions about procedures, limitations, and techniques
2. Request clarification on complex topics or unfamiliar procedures
3. Demonstrate understanding through verbal responses and practical application
4. Perform hover taxi maneuvers under instructor guidance
5. Respond to simulated radio communications and clearances
6. Identify hazards when prompted by the instructor
7. Show awareness of aircraft limitations and H/V considerations
8. Apply corrective actions when errors are identified

Completion Standards

The CFI candidate successfully completes this lesson when they demonstrate the ability to teach hover taxi operations in accordance with ACS task HI.VIII.B. Specifically, the candidate must:

Knowledge Instruction Standards:

• Accurately explain all airport information resources and their application to hover taxi operations
• Correctly describe hover taxi procedures for towered and non-towered airports
• Demonstrate understanding of airport signs, markings, and lighting systems
• Explain proper use of visual wind indicators and aircraft lighting
• Teach appropriate risk management strategies for all identified hazards

Flight Demonstration Standards:

• Complete appropriate checklists and demonstrate proper radio procedures
• Maintain powerplant and rotor RPM within normal operating limits throughout the lesson
• Demonstrate hover taxi techniques maintaining ground track within ±2 feet of centerline
• Maintain recommended hover altitude (±1/2 altitude within 10 feet AGL, ±5 feet if above 10 feet)
• Perform forward, sideward, and rearward hover taxi maneuvers smoothly and accurately
• Execute hovering turns maintaining position within 2 feet of pivot points
• Complete 360-degree turns stopping within 10° of specified headings
• Apply smooth, timely, and correct control inputs throughout all maneuvers

Teaching Effectiveness Standards:

• Present information in logical sequence appropriate for student experience level
• Use effective communication techniques including clear explanations and appropriate analogies
• Demonstrate proper error identification and correction techniques
• Provide constructive feedback that promotes learning
• Maintain appropriate focus on safety throughout the lesson

The lesson is complete when the CFI candidate demonstrates competency in teaching hover taxi operations per ACS standards HI.VIII.B, showing both technical proficiency and instructional effectiveness.