Straight-and-Level Flight

Objective

Upon completion of this lesson, the CFI candidate will demonstrate the ability to effectively teach straight-and-level flight to helicopter students by explaining the basic aerodynamic principles, flight control usage, visual references, integrated flight instruction techniques, and common errors while simultaneously demonstrating proper control inputs and corrections in accordance with ACS standards for task HI.XI.A.

Content

Basic Elements of Aircraft and Aerodynamics (HI.XI.A.K1)

Straight-and-level flight represents the fundamental equilibrium state where all aerodynamic forces are balanced. As an instructor, you must teach students that this maneuver requires understanding four primary forces and how helicopter controls affect them.

The Four Forces in Equilibrium:

• Lift equals Weight: Generated by rotor disc, countering gravitational force
• Thrust equals Drag: Forward component of rotor tilt overcomes parasitic and induced drag

Critical Aerodynamic Concepts:

• Rotor Disc Loading: Changes in collective alter disc loading, requiring cyclic adjustments
• Translating Tendency: Right pedal pressure needed due to tail rotor thrust
• Dissymmetry of Lift: At forward speeds, advancing blade creates more lift than retreating blade
• Gyroscopic Precession: Control inputs affect rotor disc 90 degrees later in rotation

Think of the helicopter like balancing a dinner plate on a stick—constant micro-adjustments maintain equilibrium, but the goal is smooth, coordinated control rather than jerky corrections.

Flight Control and Trim Use (HI.XI.A.K2)

Collective Control:

• Primary control for vertical movement and power management
• Raising collective increases pitch angle of all blades simultaneously
• Correlator automatically increases throttle with collective application
• Teach students that collective changes require opposite cyclic input to maintain attitude

Cyclic Control:

• Controls rotor disc tilt, determining direction of movement
• Forward cyclic: nose down attitude, acceleration
• Aft cyclic: nose up attitude, deceleration
• Lateral cyclic: controls bank angle and side-to-side movement

Anti-Torque Pedals:

• Counter main rotor torque effect
• More right pedal needed as power increases
• Left pedal reduces anti-torque thrust
• Critical for maintaining heading in straight-and-level flight

Trim Systems (if applicable):

• Force trim systems reduce control pressures
• Attitude trim maintains selected flight attitude
• Emphasize proper trim usage reduces pilot workload and fatigue

Visual References for the Maneuver (HI.XI.A.K3)

Outside Visual Cues:

• Horizon Reference: Primary attitude reference—teach students to use natural horizon
• Ground Track: Reference roads, section lines, or landmarks for straight flight
• Altitude References: Use prominent terrain features as altitude checkpoints

Inside References:

• Attitude Indicator: Primary backup to outside visual references
• Heading Indicator: Maintains precise heading information
• Altimeter: Monitors altitude deviations

Integration Technique: Teach the “scan pattern”—outside references 80% of time, instruments 20%. Use analogy of driving a car: you primarily look through windshield but periodically check speedometer and gauges.

Integrated Flight Instruction (HI.XI.A.K4)

Teaching Progression:

1. Demonstration: Instructor performs maneuver while explaining
2. Guided Practice: Student performs with continuous instructor guidance
3. Independent Practice: Student performs with minimal instructor input
4. Evaluation: Student demonstrates proficiency

Integration Strategies:

• Combine attitude flying with navigation awareness
• Incorporate radio communications during maneuver practice
• Introduce emergency procedures from straight-and-level flight
• Connect to advanced maneuvers (turns, climbs, descents)

Positive Transfer Learning:

• Relate helicopter controls to student’s previous experience
• Use automobile driving analogies for coordination concepts
• Build confidence through incremental complexity

Common Errors Related to This Task (HI.XI.A.K5)

Altitude Control Errors:

• Chasing altitude with collective instead of attitude adjustments
• Allowing altitude excursions beyond practical test standards
• Failure to recognize trends before they become deviations

Heading Control Errors:

• Over-controlling with pedals causing oscillations
• Ignoring heading drift during attitude or altitude corrections
• Inadequate right pedal as power increases

Attitude Control Errors:

• Death grip on controls preventing smooth corrections
• Fixating on instruments instead of outside references
• Making large, abrupt control inputs instead of small corrections

Scan Pattern Errors:

• Instrument fixation neglecting outside references
• Inadequate instrument cross-check
• Failure to integrate attitude and performance instruments

Risk Management Elements

Distractions and Task Prioritization (HI.XI.A.R1):

• Teach aviate, navigate, communicate priority
• Establish scan patterns to prevent target fixation
• Practice maintaining flight path during various distractions
• Emphasize trim usage to reduce workload

Collision Hazards (HI.XI.A.R2):

• Maintain continuous visual scanning for traffic
• Use clearing turns before maneuver practice
• Emphasize see-and-avoid responsibility
• Coordinate with ATC when in controlled airspace

Schedule

Equipment

Required References

• FAA-H-8083-4 Helicopter Instructor’s Handbook
• FAA-S-ACS-29 Helicopter Airman Certification Standards
• Aircraft Flight Manual/Pilot’s Operating Handbook
• FAA-H-8083-21 Helicopter Flying Handbook

Training Materials

• Whiteboard or flipchart for force diagrams
• Helicopter control mockup or training device
• Visual aids showing proper scan patterns
• Video examples of correct vs. incorrect technique

Aircraft Equipment

• Dual-control helicopter with standard flight instruments
• Intercom system for clear communication
• Current charts and approach plates

Instructor Actions

The CFI candidate will demonstrate instructional competence by:

1. Explaining Aerodynamic Theory: Draw force diagrams showing balanced flight conditions and explain how control inputs affect force balance using clear analogies

2. Demonstrating Control Integration: Using training device or aircraft controls, show smooth, coordinated inputs while explaining the relationship between collective, cyclic, and pedal controls

3. Teaching Visual Scan Techniques: Model proper outside-to-inside reference scanning while maintaining straight-and-level flight, verbalizing thought process

4. Identifying and Correcting Common Errors: Demonstrate typical student errors and show proper correction techniques while explaining the underlying causes

5. Emphasizing Risk Management: Point out potential hazards and demonstrate proper clearing procedures, task prioritization, and situational awareness techniques

6. Conducting Integrated Flight Instruction: Show progression from demonstration through guided practice to independent performance while maintaining safety oversight

Student Actions

The student (DPE acting as student) will:

1. Ask relevant questions about aerodynamic principles and control relationships to test instructor’s knowledge depth

2. Demonstrate understanding by correctly identifying the four forces and explaining how controls affect each force

3. Practice scan techniques by verbalizing the sequence of outside and inside references during simulated flight

4. Identify common errors from instructor-provided scenarios and suggest appropriate correction methods

5. Demonstrate situational awareness by recognizing risk factors and proposing mitigation strategies

6. Show learning progression by moving from passive observation through guided practice to independent demonstration

Completion Standards

The CFI candidate successfully completes this lesson when they demonstrate the ability to:

1. Clearly explain all aerodynamic principles affecting straight-and-level flight including the four forces, rotor disc effects, and control relationships per HI.XI.A.K1

2. Accurately describe flight control functions and demonstrate proper control coordination and trim usage per HI.XI.A.K2

3. Effectively teach visual reference techniques including proper scan patterns and integration of outside/inside references per HI.XI.A.K3

4. Apply integrated flight instruction methods showing logical lesson progression and positive transfer techniques per HI.XI.A.K4

5. Identify and demonstrate correction of common errors including altitude, heading, attitude, and scan pattern deviations per HI.XI.A.K5

6. Address all risk management elements including distraction management, task prioritization, and collision avoidance per HI.XI.A.R1 and HI.XI.A.R2

7. Demonstrate teaching skills that would enable a student to establish and maintain straight-and-level flight within ACS standards and analyze/correct related errors per HI.XI.A.S1 and HI.XI.A.S2

The lesson meets ACS task HI.XI.A standards when the CFI candidate displays instructional competence that would enable effective teaching of straight-and-level flight fundamentals to helicopter students.