Private pilot · ACS PA.IV.M
Forward Slip to a Landing
A forward slip is a deliberately cross-controlled descent: one wing down, opposite rudder.
It adds drag, so the airplane descends more steeply at the same airspeed. It’s the classic fix for being too high on final.
Why this one matters
A pilot who arrives too high often dives at the runway, lands fast and long, and runs off the end. The forward slip is the tool for losing extra height without extra speed. Misused, low and uncoordinated near the ground, it can also cause a hard landing or a side load on the gear, so it is flown with discipline.
Can’t miss
- •A forward slip steepens the descent without increasing airspeed: use it when you’re too high on final, especially without flaps.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- •Lower one wing with aileron and apply opposite rudder; the nose points away from the low wing while the track stays aligned with the runway. Bank sets how much you slip (and so the descent angle), rudder holds the heading and track, and pitch holds the airspeed.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- •In a crosswind, slip with the upwind wing low.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- •Check the POH for slip limitations: some airplanes restrict slips with flaps extended, and low fuel can unport a tank in a prolonged slip.(Your airplane's POH/AFM)
- •The airspeed indicator can read wrong in a slip; fly the attitude, and use the pitch you know.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- •Before touchdown the nose must be aligned with the runway. With no crosswind, take the slip out and land coordinated. In a crosswind, transition to a sideslip (upwind wing low, opposite rudder holding the nose straight) and hold it through touchdown, landing on the upwind main wheel first. Never touch down crabbed or drifting.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- •Touch down within 400 feet beyond your point, aligned with the centerline and no drift.(Private Pilot ACS (FAA-S-ACS-6C), PA.IV.M.S8)
What you should know
What a slip does, and when K1 · K4
- The slip exposes the side of the fuselage to the airflow, adding drag, so the descent steepens without the airspeed increasing.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- Use it when you’re too high on final and more flaps aren’t available or appropriate, or for a forced landing to an off-field spot.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- Energy management: the slip trades height for drag, not speed. It's a planned correction from a stabilized approach, not a salvage maneuver: if a slip at approach speed on track isn't bringing the aiming point back, or the approach is unstable at any point, go around rather than steepening it, pulling, or carrying a full slip into the flare.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- Modulate it: more bank gives more slip and a steeper descent, up to the practical limit where full opposite rudder is reached with aileron still available. Rudder holds the heading and ground track; pitch holds the airspeed. Don't use bank as the track control.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- The technique, for the demonstration: checklist done, power to idle abeam the landing point, flaps usually up, and slip on downwind, base or final as needed, with coordinated (not slipping) turns to base and final. Enter by lowering the wing (into the wind in a crosswind) with simultaneous opposite rudder and a slight nose-up to hold speed; exit by leveling the wings while releasing the rudder and readjusting pitch, all smoothly together.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings; Private Pilot ACS (FAA-S-ACS-6C), PA.IV.M.S3, S5, S6)
Wind and conditions K2 · K3 · R1
- In a crosswind, slip with the upwind wing low: the slip also corrects for the drift. Before touchdown, transition to a sideslip: rudder brings the nose in line with the runway, the low wing stops the drift, and you hold that cross-control through the touchdown and rollout, adding aileron as the airplane slows.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- High density altitude means higher groundspeed: plan the approach and touchdown with that in mind.(PHAK (FAA-H-8083-25C), Aircraft Performance)
- Choose the touchdown point and path for the wind, runway length and obstacles, and know your airplane’s slip limits.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
Slip hazards R7 · R8 · R9
- Some POHs restrict or prohibit slips with flaps extended, for example because airflow over the tail can cause buffeting or a nose-down pitch. Follow your airplane’s limitations.(Your airplane's POH/AFM)
- In a prolonged slip with a low fuel tank, fuel can move away from the outlet: some POHs limit slip duration. Watch the airspeed: pitot-static position errors can make the indicator unreliable in a slip.(Your airplane's POH/AFM)
- Touching down with the longitudinal axis misaligned or drifting puts side loads on the gear and can cause a ground loop. Align the nose before touchdown: coordinated in calm wind, in a sideslip in a crosswind (a crosswind sideslip is cross-controlled on purpose; that's correct, not crossed up).(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- If the slip leaves you unstable on short final, go around.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- A slip is deliberate cross-controlled flight close to the ground. Don't pull to stretch it, and don't slip through the turn from base to final: a cross-control stall can roll toward the low wing with no height to recover. If the speed decays or you feel buffet, reduce the angle of attack, take out the slip, and go around.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
Wind, surface and wake on landing R2
- Crosswind: crab on the approach and change to a sideslip (upwind wing low, opposite rudder) before touchdown, or set up the wing-low sideslip earlier on final. Touch down with no drift, aligned with the centerline, on the upwind main wheel first in a stronger crosswind, and keep increasing aileron into the wind during the rollout.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- The POH’s maximum demonstrated crosswind component is what was tested, not a limitation. Set your own limit, and use a runway more nearly into the wind when you can.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- A tailwind raises your groundspeed and landing distance. Gusts: the gust factor is the peak gust minus the steady wind (10 gusting 20 is 10 knots); add no more than half of it (5 knots) to your approach speed.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- Wind shear on short final can cause a sudden loss of airspeed and a high sink rate. Be ready to add power and go around.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- Wake turbulence: behind a larger airplane landing, stay above its approach path and land beyond its touchdown point.(AIM, Chapter 7, Wake Turbulence)
- Wet or grass surfaces lengthen the landing roll and reduce braking. Use the POH corrections.(PHAK (FAA-H-8083-25C), Aircraft Performance)
Planning for the go-around, and LAHSO R3
- Plan every approach as a go-around: brief yourself on when you’ll go around (unstable, too fast, too high, drifting, traffic on the runway) before you start. Touchdown isn't a point of no return: after a bad bounce, a big balloon or a loss of control, with enough runway left, a rejected landing is still available (full power, the right attitude and configuration per the POH, and tell ATC).(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- A LAHSO clearance means landing and stopping before an intersecting runway or point. You may decline it; student pilots and pilots unfamiliar with LAHSO should not accept it. Know the available landing distance and your airplane’s performance.(AIM 4-3-11, Pilot Responsibilities When Conducting Land and Hold Short Operations (LAHSO))
- If you accept LAHSO and then must go around, keep safe separation from the intersecting traffic and tell the tower promptly.(AIM 4-3-11, Pilot Responsibilities When Conducting Land and Hold Short Operations (LAHSO))
Low, slow and busy R4 · R5 · R6
- Takeoffs and landings are where traffic converges: look for airplanes on final and on the runway before you line up or turn final, and use landing lights.(AC 90-48, Pilots' Role in Collision Avoidance)
- Close to the ground there’s no room to recover. A skidding turn to final, a nose-high climb or a stretched glide can stall and spin; flight into terrain or obstacles can follow a distraction.(Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings)
- Fly the airplane first. Finish checklists and radio calls before the critical moments, and if you’re overloaded on final, go around.(Risk Management Handbook (FAA-H-8083-2A))
On the flight
ACS standards
- Maintain a ground track aligned with the runway center or landing path.(Private Pilot ACS (FAA-S-ACS-6C), PA.IV.M.S9)
- Touch down at a proper pitch attitude, within 400 feet beyond or on the specified point, with no side drift, and with the longitudinal axis aligned with and over the runway center or landing path.(Private Pilot ACS (FAA-S-ACS-6C), PA.IV.M.S8)
- And the steps before it: the checklist, radio calls, a flightpath planned for altitude, wind, terrain and obstructions, the most suitable touchdown point, downwind flown parallel to the runway, the correct configuration, and the slip correlated with the crosswind with a transition to a sideslip.(Private Pilot ACS (FAA-S-ACS-6C), PA.IV.M.S1-S7)
What your instructor is watching for
Your instructor watches whether the track stays aligned with the runway, you hold a steady pitch attitude, you use the upwind wing in a crosswind, and the nose is aligned at touchdown: coordinated in calm wind, held in a sideslip on the upwind wheel in a crosswind.
Scenarios
Decide what you would do first, then see the worked answer.
Your airplane’s POH says to avoid slips with the flaps extended.
You’re high on final with full flaps. What do you do? See the worked answer
Don’t slip. Go around and set up a better approach.
Your airplane's POH/AFM
In a slip, the airspeed indicator shows 10 knots slower than you expect.
What could be happening, and what do you do? See the worked answer
The pitot-static system can read wrong in a slip. Hold the pitch attitude you know for approach speed, and check the airspeed again once coordinated.
Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings
You hold the slip too long and touch down still crossed up.
What’s the risk? See the worked answer
With the nose still pointed away from the runway, a side load on the gear and a possible ground loop or loss of directional control. Align the nose with rudder before touchdown: take the slip out in calm wind, or change to a sideslip held through touchdown in a crosswind.
Airplane Flying Handbook (FAA-H-8083-3C), Approaches and Landings
Common mistakes
Letting the nose drop in the slip.
Airspeed increases, defeating the purpose.
Instead: Hold the pitch attitude for approach speed.
Letting the track drift off the centerline.
The slip should only change the descent, not the direction of travel.
Instead: Hold the heading and track with rudder, and the slip amount with bank.
Adding power while trying to lose altitude.
It defeats the slip.
Instead: Power at idle for the demonstration; manage the descent with the amount of slip.
Slipping in the same direction as the crosswind.
The low wing should be into the wind; the wrong way adds drift.
Instead: Lower the upwind wing.
Trusting the airspeed indicator in a slip, or poor glidepath control.
Pitot-static position error makes it read wrong; the path gets away from you.
Instead: Hold the pitch attitude you know for approach speed, and watch the aiming point.
A late change to the sideslip, or landing off the centerline.
You touch down drifting, misaligned, or beside the centerline.
Instead: Transition early and land with the axis aligned with and over the centerline.
Touching down with the nose not aligned.
A forward slip at touchdown loads the gear sideways.
Instead: Align the nose early enough: coordinated in calm wind, a sideslip held through touchdown in a crosswind.
Taking out all the cross-control in a crosswind flare.
The airplane starts drifting just as the wheels touch.
Instead: Keep the upwind wing low and the nose straight with rudder through touchdown and rollout.
Now train it
Say it out loud, hear it asked, and take the quick check in this lesson’s practice pack. It tracks your shaky spots.
Got it?
When it feels solid, practice forward slip to a landing out loud with our examiner.
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Sources
- Airplane Flying Handbook (FAA-H-8083-3C): Takeoffs and Departure Climbs; Approaches and Landings
- Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C): Aircraft Performance; Aerodynamics of Flight
- Aeronautical Information Manual (AIM): Chapter 4 (airport operations, LAHSO) and Chapter 7 (wake turbulence)
- AC 91-73: Single Pilot Procedures During Taxi Operations
- Private Pilot ACS (FAA-S-ACS-6C): Area IV
- Your airplane's POH/AFM: normal procedures, performance charts and speeds
Study aid, not FAA guidance. Regulations change; check the current text at eCFR and the ACS. Checked against current sources 2026-11-12.