Commercial Pilot ACS Study Guide: Steep Turns

A well-flown steep turn can look almost effortless, but inside the airplane several things are changing at once.

As bank increases, the vertical component of lift decreases, load factor rises, stall speed increases, and overbanking tendency becomes more noticeable. Meanwhile, the pilot must maintain altitude, airspeed, bank, coordination, and situational awareness throughout the maneuver.

That is what makes steep turns valuable at the commercial level. The maneuver demonstrates whether a pilot can anticipate how the airplane will respond under increased load rather than simply react to deviations.

What the ACS Is Really Evaluating

Under CA.V.A, commercial pilot applicants should understand the procedure and aerodynamics associated with:

• Coordinated flight
• Overbanking tendency
• Maneuvering speed and aircraft weight
• Load factor and accelerated stalls
• Rate and radius of turn
• Division of attention and collision avoidance

Don’t prepare for steep turns by memorizing control inputs alone. Be prepared to explain why those inputs are necessary.

The Aerodynamics Behind the Turn

When an airplane banks, the lift vector tilts. Part of the lift now acts horizontally to turn the airplane, leaving less lift available vertically to oppose weight.

To maintain altitude, the pilot must increase total lift, typically by increasing angle of attack with additional back pressure. The increased angle of attack also creates additional induced drag, which may require additional power to maintain airspeed.

A useful way to remember the relationship is:

More Bank → Less Vertical Lift → More AOA → More Drag → More Power

Load Factor and Stall Speed

As bank increases in a level turn, load factor increases.

For perspective:

45° bank ≈ 1.4 G
60° bank = 2 G

The increased load factor also increases stall speed.

Accelerated Stall Speed = Normal Stall Speed × √Load Factor

If an airplane normally stalls at 50 knots, its approximate stall speed becomes:

• 59 knots at 1.4 G
• 71 knots at 2 G

This is why simply pulling harder when the nose drops during a steep turn can create additional problems. Increasing back pressure raises angle of attack and load factor.

If the airplane develops an excessive nose-low attitude, reduce excessive bank as necessary before aggressively increasing elevator pressure.

Overbanking Tendency

During a steep turn, the airplane may have a tendency to continue rolling toward a steeper bank.

Once established, slight opposite aileron pressure may therefore be necessary to maintain the desired bank angle.

The goal is not to hold the controls in one fixed position. A commercial pilot should continuously recognize what the airplane is doing and make small, coordinated corrections.

Before You Roll In

Set yourself up before beginning the maneuver.

Clear the area. Maintain traffic awareness before and throughout the maneuver.

Choose an outside reference. Select an identifiable point near your entry heading to help judge the completion of the turn.

Establish the proper airspeed. Use the manufacturer’s recommended airspeed. If none is published, the ACS requires an airspeed not exceeding VA.

Remember that VA decreases as aircraft weight decreases.

Flying the Steep Turn

Roll-In

Smoothly roll into approximately 50° of bank while remaining coordinated.

As bank increases, anticipate the need for additional back pressure and power. Don’t wait for the altimeter or airspeed indicator to show a large deviation before correcting.

Once Established

Use the outside horizon as your primary attitude reference while regularly cross-checking the instruments.

A useful scan is:

Outside Attitude → Bank → Altitude → Airspeed → Coordination → Traffic

The objective is to make small corrections early rather than large corrections after the airplane has already departed from the desired condition.

Correct the Cause

If you’re losing altitude with the correct bank, slightly increase back pressure.

If you’re gaining altitude, slightly relax back pressure.

If the bank is becoming too steep, use coordinated opposite aileron.

If airspeed changes, evaluate pitch, bank, and power rather than focusing on only one control.

Don’t Be Late on the Rollout

Waiting until you reach the entry heading to begin rolling out will usually result in an overshoot.

Lead the rollout based on the airplane’s roll rate. As bank decreases, smoothly reduce the additional back pressure and power that were required during the turn.

Think:

Reduce Bank → Reduce Back Pressure → Adjust Power → Stabilize

The goal is to arrive at the original heading already stabilized rather than correcting everything after the wings are level.

Commercial ACS Standards

The applicant must perform a coordinated 360° steep turn at approximately 50° of bank and repeat the maneuver in the opposite direction.

The applicant must also establish the manufacturer’s recommended airspeed or, if one is not published, an airspeed not exceeding VA.

Checkride Questions to Know

Why is back pressure required?
Banking reduces the vertical component of lift. Increasing angle of attack increases total lift to help maintain altitude.

Why might additional power be necessary?
The increased angle of attack required to maintain altitude creates additional induced drag.

Why does stall speed increase?
The airplane is operating at an increased load factor.

What is overbanking tendency?
The tendency for the airplane to continue toward a steeper bank, requiring appropriate opposite aileron pressure.

Why does VA matter?
Steep turns involve increased load factors, making maneuvering speed an important limitation to understand. VA also decreases as aircraft weight decreases.

What happens to turn radius as bank increases at the same airspeed?
Turn radius decreases while rate of turn increases.

Practice With Purpose

Instead of repeatedly flying the entire maneuver and trying to “save” every deviation, isolate the skills that need improvement.

Practice establishing 50° of bank without overshooting. Learn the correct outside sight picture. Work on anticipating back pressure before altitude changes and practice leading the rollout correctly.

Then combine those skills into one smooth maneuver.

The goal is not to make increasingly aggressive corrections to remain within ACS tolerances. It is to make fewer corrections because you’re staying ahead of the airplane.

Final Takeaway

Steep turns demonstrate the difference between reactive and anticipatory aircraft control.

A commercial pilot should understand how bank affects lift, load factor, stall speed, drag, and turn performance while maintaining coordination and situational awareness.

When the maneuver is flown correctly, the airplane should settle into the turn with only small, deliberate corrections. That’s the level of precision and understanding you’re working toward on the Commercial Pilot practical test.

FAA References

• Commercial Pilot for Airplane Category Airman Certification Standards (FAA-S-ACS-7B), Area of Operation V, Task A — Steep Turns
• Airplane Flying Handbook (FAA-H-8083-3C), Chapter 10 — Performance Maneuvers
• Pilot’s Handbook of Aeronautical Knowledge (FAA-H-8083-25C)