Private pilot · ACS PA.IV.C · lesson pack

Soft-Field Takeoff and Climb

Why this one matters

Soft runways hide traps: a much longer roll than you planned, an airplane that lifts off in ground effect but can’t climb, and a pilot who pulls it up too slow and stalls just above the ground. Knowing how ground effect and weight transfer work lets you get off safely, or recognize early that you shouldn’t try.

1 · Know these cold

•On grass, mud, sand or snow, keep the airplane moving: stopping can bog it down.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
•Hold the yoke aft, and turned into any crosswind, at the start of the roll; ease the back pressure as the nosewheel lifts so it stays just clear, and reduce the aileron as the controls become effective: weight moves to the wings as fast as possible. While taxiing, keep back pressure but still position for the wind (with a quartering tailwind, elevator down).(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
•Lift off at the lowest possible airspeed, then lower the nose to stay in ground effect while accelerating to VX or VY.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
•Ground effect reduces induced drag within about one wingspan of the surface, so the airplane can fly before it can climb. Stay in it while accelerating to VY (or VX if there's an obstacle); never climb away below VX.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
•High power, high pitch and low speed bring strong left-turning tendencies: lots of right rudder.(PHAK (FAA-H-8083-25C), Aerodynamics of Flight)
•Use the POH flap setting for a soft field, and its performance data: soft surfaces lengthen the takeoff roll a lot.(Your airplane's POH/AFM)
•Climb at VX or VY +10/-5 knots to a safe maneuvering altitude.(Private Pilot ACS (FAA-S-ACS-6C), PA.IV.C.S10-S12)

2 · The lesson

Performance, speeds and configuration

Soft surfaces, high density altitude, weight and slope all lengthen the roll. Make it a calculation: the POH chart for the temperature, pressure altitude, weight and surface, against the runway available. If the POH has no figure for the surface, don't go.(PHAK (FAA-H-8083-25C), Aircraft Performance)
At a high or hot field, lean for maximum power (or RPM) per the POH before the roll, and confirm you're getting full power on the roll.(PHAK (FAA-H-8083-25C), Aircraft Performance; POH)
Build the abort point before you roll: from the POH distance for these conditions, choose a physical mark by which you must be airborne (or at a planned fraction of liftoff speed). Not there by the mark: throttle idle, stay straight, brake only as needed with the nosewheel light.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
Climb at VX if there are obstacles, otherwise VY.(PHAK (FAA-H-8083-25C), Aircraft Performance)
Set the flaps as the POH recommends for a soft-field takeoff; flaps let the wing lift off at a lower speed.(Your airplane's POH/AFM)
Pick the firmest, longest, most into-the-wind runway, and walk or inspect a doubtful surface first.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)

Weight transfer and ground effect

Before you roll: the checklist with the POH soft-field configuration, the radio calls, the correct runway verified, the wind found (with or without indicators) and the controls positioned for it, and the area clear. Then taxi onto the runway without stopping, with back pressure, add power smoothly as you line up, and confirm takeoff power and normal engine and flight instrument indications (RPM or manifold pressure, oil pressure and temperature, airspeed alive).(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs; FAA-S-ACS-6C, PA.IV.C.S1-S7)
Start the roll with full back elevator to take weight off the nosewheel. As speed builds and the nose rises, ease the back pressure so the nosewheel is held just clear: full back pressure all the way risks a tail strike and adds drag.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
Ground effect: within about one wingspan of the surface, the wingtip vortices and downwash are reduced, so induced drag drops. The airplane can fly at a speed too low to climb out of ground effect.(PHAK (FAA-H-8083-25C), Aerodynamics of Flight)
After liftoff, lower the nose slightly to stay just above the surface until you reach VY (or VX for an obstacle), then climb. As you leave ground effect, expect to need more pitch and back pressure as induced drag rises; don't let the nose climb away on its own.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
Cleaning up, per the POH: with a positive rate of climb, retract the gear and flaps as the POH sequences them (flaps in increments, so you don't dump lift), never in ground effect, holding VX or VY +10/-5 knots. If there’s an obstacle, climb at VX until it’s cleared, then VY. Reduce to climb power only as the POH directs, at a safe maneuvering altitude.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)

Left-turning tendencies

Torque, P-factor and spiraling slipstream yaw a single-engine airplane left, most strongly at high power, high angle of attack and low speed. Gyroscopic precession is different: it acts only while the pitch attitude is changing, such as when you raise the nose.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
A soft-field takeoff is the extreme case: full power, nose high, low speed. Hold right rudder, and keep the airplane straight on the runway.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)

Wind, surface and wake on takeoff

Crosswind: start the roll with full aileron into the wind and reduce it as speed builds; use rudder to hold the centerline. After liftoff, turn into the wind (crab) to track the extended centerline.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
A headwind shortens the ground roll; a tailwind lengthens it a lot. Use the POH chart’s wind corrections, and avoid tailwind takeoffs when you have a choice.(PHAK (FAA-H-8083-25C), Aircraft Performance)
Gusts and wind shear are different. In ordinary gusty wind, use the POH guidance for extra margin. Wind shear, especially a microburst or thunderstorm outflow, can drop the airspeed suddenly after liftoff: don't take off into known or reported wind shear; wait for it to pass.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
Wake turbulence behind a larger airplane taking off: note its rotation point and lift off before it only at your normal rotation speed (never force an early liftoff), then climb above its path and stay upwind of it or turn away. If you can't, which is the usual case for a trainer behind a jet, ask for a delay (ATC uses timed intervals, such as 2 minutes behind a heavy, 3 for an intersection or opposite-direction departure behind a large airplane), and never assume you can outclimb it.(AIM, Chapter 7, Wake Turbulence)
Grass, wet, snowy or uphill surfaces lengthen the takeoff roll. Apply the POH corrections, and add your own margin.(PHAK (FAA-H-8083-25C), Aircraft Performance)

Planning for the takeoff that goes wrong

Before you roll, decide where you’ll abort: if the airplane isn’t at the expected speed by a chosen point, or anything looks or sounds wrong, close the throttle and stop straight ahead.(Airplane Flying Handbook (FAA-H-8083-3C), Takeoffs and Departure Climbs)
If the engine fails after liftoff with runway left, land on it. If it fails at low altitude past the runway, lower the nose to hold best glide speed and land roughly straight ahead, turning only enough to avoid obstacles.(Airplane Flying Handbook (FAA-H-8083-3C), Emergency Procedures)
Turning back to the runway at low altitude is how many engine failures turn fatal: it needs far more altitude than most pilots expect, and a steep, slow turn can stall and spin.(Airplane Flying Handbook (FAA-H-8083-3C), Emergency Procedures)

Low, slow and busy

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))

Engine failure, wake and wind shear

Engine failure after liftoff: one first action, whatever the runway left. Lower the nose immediately to keep flying speed (best glide), then land on the remaining runway if it's there; if not, land essentially straight ahead with only small turns to avoid obstacles. Control first, landing spot second.(Airplane Flying Handbook (FAA-H-8083-3C), Ch. 5)
Behind a larger departing airplane, you'd need to lift off before its rotation point and climb above and upwind of its path; but a soft-field takeoff keeps you in ground effect until VX or VY, so waiting is usually the workable choice (at least 2 minutes, including after a larger airplane's low approach, missed approach or touch-and-go).(AIM 7-4-6, 7-4-9)
Gusts get the gust-factor margin; suspected wind shear, a microburst or thunderstorm outflow gets avoided: delay the takeoff until it passes. Extra speed is no protection against wind shear while you're in ground effect.(AIM 7-1; AC 00-54)

Want it all on one page, with scenarios? Read the full lesson.

On the flight

ACS standards

Lift off at the lowest possible airspeed and stay in ground effect while accelerating to VX or VY.(Private Pilot ACS (FAA-S-ACS-6C), PA.IV.C.S9)
Climb at VX or VY +10/-5 knots to a safe maneuvering altitude.(Private Pilot ACS (FAA-S-ACS-6C), PA.IV.C.S10, S12)

What your instructor is watching for

Your instructor watches whether you keep moving onto the runway, hold the nose up without striking the tail, keep straight with right rudder, stay in ground effect until you have climb speed, and configure only after a positive climb.

3 · Say it out loud

Answer each one out loud, then check yourself and mark how it went.

Remember Recall it
“What is ground effect?”
Understand Explain why
“Why stay in ground effect after a soft-field liftoff?”
Apply Use it on a flight
“You lift off and the airplane won’t accelerate in ground effect, with trees ahead. What do you do?”

4 · Common mistakes

Stopping on the soft surface before takeoff.
The airplane can sink in and need much more power and distance to move.
Instead: Do the run-up on a firm surface, then roll onto the runway and straight into the takeoff.
Climbing out of ground effect too early.
Trying to climb out of ground effect before reaching VX can leave the airplane unable to climb any further, even at full power, and it may settle back onto the surface. (VX is the best angle-of-climb speed, not a no-climb line.)
Instead: Lower the nose after liftoff and stay in ground effect while accelerating to VY, or VX if there's an obstacle; never climb out below VX.
Holding full back pressure all the way.
A very nose-high attitude adds drag and can strike the tail.
Instead: Full back elevator to start, then ease it off as the nose rises to hold the nosewheel just clear.

5 · Quick check

Answer, then reveal. Flag anything you want to see again.

1. Why hold back pressure during a soft-field takeoff roll?
2. Within about what height is ground effect significant?
3. What happens if you climb out of ground effect too slow?
4. Why are left-turning tendencies strong in this takeoff?
5. What are the checkride climb tolerances?
Scenario6. The grass is long and wet, and the POH numbers leave little margin. What do you do?

Trained it? Now prove it: practice soft-field takeoff and climb out loud with our examiner.

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Connect it

One situation that runs across this lesson and its neighbors in the same ACS area. Decide first, then check.

Connect it · Takeoffs, Landings & Go-Arounds

A 2,200-foot grass strip, wet after rain, with trees off the departure end. You land there, then leave an hour later.

Which techniques does each part of the visit call for, and where are your go-around and abort points? Decide, then see the worked answer

Decide before you go. Work both numbers from the POH: the landing distance on wet grass, and the takeoff distance to clear the trees on departure. Compare both with the 2,200 feet, with margin. Many POHs publish only a dry-grass correction, or none at all; where there's no wet-grass figure, add a conservative margin of your own. If the departure won't fit, don't land there. Arriving: fly a stabilized approach and pick a go-around point; if you're not on speed and on spot by then, go around rather than float down a short, soft runway. Land soft-field style: carry a little power through the roundout and touchdown, touch down nose-high at minimum controllable speed with minimum sink, hold the nosewheel off, keep your momentum, and avoid wheel braking. Leaving: this is a soft-field takeoff and climb with an obstacle. Keep moving onto the runway and lift off with soft-field technique; the short-field brake-hold-and-rotate procedure isn't used on wet grass. Accelerate in ground effect, then climb at Vx over the trees. From short-field technique only two things carry over: use all the runway available, and the Vx obstacle climb. Brief a concrete abort point before you roll; a common rule of thumb is about 70% of liftoff speed by the runway midpoint. Wet grass brakes poorly, so allow for a longer stop. If you don't have it by then, abort straight ahead.

AFH (FAA-H-8083-3C), Takeoffs and Departure Climbs, Approaches and Landings; PHAK (FAA-H-8083-25C), Aircraft Performance

Brings together: Soft-Field Takeoff and Climb · Soft-Field Approach and Landing · Go-Around/Rejected Landing

Teaching this? The instructor lesson plan →

Study aid, not FAA guidance. Sources: Airplane Flying Handbook (FAA-H-8083-3C); Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C); Aeronautical Information Manual (AIM); AC 91-73; Private Pilot ACS (FAA-S-ACS-6C); Your airplane's POH/AFM. Checked against current sources 2026-11-12.