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Archive / FAA Weight-Shift Control Aircraft Flying Handbook / FAA Weight-Shift Control Aircraft Flying Handbook: Chapter 11 — Cross-Country Flight

Chapter 11 — Cross-Country Flight

Chapter 11 — Cross-Country Flight — Part 1

FAA-H-8083-5 (2008)

Approaches and Landings

Chapter 11

Introduction

Approaches and landings are critical maneuvers and require

the skills built from basic fl ight maneuvers, ground reference

maneuvers, and airport traffi c patterns. A proper approach is

required for a proper roundout and touchdown. With the large

number of environmental variables the pilot must consider,

in addition to the skill to judge aircraft speed, descent rate,

and distance above the ground, landing is normally the last

basic maneuver the student learns before solo.

Approaches and landings will be fi rst discussed with the

fundamentals of a normal approach and landing in calm

winds on a large hard-surfaced runway. This will provide the

basis for specifi c power-on, crosswind, and steep approach

maneuvers, as well as other types of approaches and landings

that WSC commonly encounter.

Normal (Calm Wind) Approaches and

Landings

A normal or regular approach and landing involves the use

of procedures for what is considered a simple situation. It

provides the minimum number of variables for the student

pilot to learn during the fi rst landings; that is, when engine

power is at idle, wind is light, and the fi nal approach is

made directly into the wind, the fi nal approach path has no

obstacles, and the landing surface is fi rm and of ample length

to bring the aircraft gradually to a stop. This includes normal

runways used for WSC that are asphalt, concrete, solid dirt,

gravel or short grass. The selected landing point should be

beyond the runway’s approach threshold but within the fi rst

one-third portion of the runway.

The factors involved and the procedures described for the

normal approach and landing also have applications to

the other-than-normal approaches and landings which are

discussed later in this chapter. Therefore, the principles of

simple (or normal) operations are explained fi rst and must be

understood before proceeding to more complex operations.

To assist the pilot in understanding the factors that infl uence

judgment and procedures, the last part of the approach pattern

and the actual landing is divided into fi ve phases:

• Base leg

• Final approach

• Roundout

• Touchdown

• After-landing roll

Remember that the manufacturer’s recommended procedures,

including aircraft confi guration, airspeeds, power, and other

information relevant to approaches and landings in a specifi c

make and model aircraft are contained in the Aircraft Flight

Manual (AFM) and/or Pilot’s Operating Handbook (POH)

for that aircraft. If any of the information in this chapter

differs from the aircraft manufacturer’s recommendations

as contained in the AFM/POH, the aircraft manufacturer’s

recommendations take precedence.

Throttle Use

As discussed in Chapter 2, Aerodynamics, the WSC aircraft

has a good glide ratio, and normal landings can easily be

done with the power at idle. It is a good practice to master

the landings with the throttle at idle so that the glide angle,

speeds, and descent rates become habit and part of a normal

routine. This is helpful so that, if there is an engine failure,

the pilot is accustomed to landing with minimum power and

is able to spot land the WSC aircraft for emergency conditions

at or beyond a specifi ed point. As a general practice for

normal landings in calm conditions or a slight headwind,

the throttle should be brought back to idle at the start of the

base leg for landings.

Title 14 of the Code of Federal Regulations (14 CFR), section

91.119, Minimum Safe Altitudes: General, is an important

safety precaution and states: “Except when necessary

for takeoff or landing, no person may operate an aircraft

anywhere below... an altitude allowing, if a power unit fails,

an emergency landing without undue hazard to persons or

property on the surface.” This allows long fi nal approaches

“with power when necessary,” but overall, it is important to

be no lower than an altitude from which you can glide to a safe

landing area. For the purposes of this approach-and-landing

discussion, it is assumed that there are no safe landing areas

other than the runway.

It should be noted that the power is above idle for some

landing situations, such as:

• Students fi rst learning to land; a slower rate of descent

is the result of higher power settings. In this case, the

landings would be done with a target farther down the

runway so a safe landing could always be made with

engine failure.

• Shallower descent angle if directed by air traffi c control

(ATC), or a longer fi nal approach is required.

• High winds and/or turbulent conditions requiring a

higher energy level.

For landings where throttle is required, the foot throttle is

typically used so the hands can stay on the control bar while

approaching the ground for this critical phase of fl ight.

However, the hand/cruise throttle may be set above idle for

specifi c situations as required by the pilot. Higher power

settings for approaches and landings are discussed later in

this chapter.

Base Leg

The placement of the base leg is one of the more important

judgments made by the pilot in any landing approach.

[Figure 11-1] The pilot must accurately judge the altitude

and distance from which the descent results in landing at

the desired point.

The base leg should be started at a point where the power

can be brought back to idle and the WSC aircraft can glide to

the landing spot at the approach speed recommended by the

manufacturer. The intended landing point should not be at the

end of the runway on a threshold or numbers, but beyond at

the landing lines. [Figure 11-2] This provides some margin

if the landing is shorter than anticipated. For smaller runways

that do not have these markings, establish an appropriate

Aiming Point for Landings

Figure 11-2. Typical landing position on runway.

Figure 11-1. Base leg and final approach.

landing point beyond the start of the runway, allowing plenty

of room for the after-landing roll. At much larger airports, the

landing can be done farther down the runway or at a location

where the pilot can taxi off the runway and not delay other

air traffi c behind the aircraft.

After turning onto the base leg, the pilot should continue

the descent with reduced power and approach airspeed as

recommended by the manufacturer. As discussed in Chapter

7, Takeoff and Departure, this speed is at least 1.3 times the

stall speed. Landing trim should be adjusted according to

manufacturer specifi cations (if equipped).

Drift correction should be established and maintained to follow

a ground track perpendicular to the extension of the centerline

of the runway on which the landing is to be made. Since the

fi nal approach and landing are normally made into the wind,

there may be a crosswind during the base leg. The aircraft must

be angled suffi ciently into the wind to prevent drifting farther

away from the intended landing point.

The base leg should be continued to the point where a

medium- to shallow-banked turn aligns the aircraft’s path

directly with the centerline of the landing runway. This

descending turn should be completed at a safe altitude that is

dependent upon the height of the terrain and any obstructions

along the ground track. The turn to the fi nal approach should

also be suffi ciently above the airport elevation to permit a

Figure 11-4. Turning from base onto final.

Runway

Figure 11-3. On base preparing to turn onto final.

Figure 11-5. Lining up on the runway centerline and maintaining

position.

fi nal approach long enough for the pilot to accurately estimate

the resultant point of touchdown, while maintaining the

proper approach airspeed. This requires careful planning

for the starting point and radius of the turn. [Figure 11-3]

Normally, it is recommended that the angle of bank not

exceed a medium bank because the steeper the angle of bank,

the higher the airspeed at which the aircraft stalls. Since the

base-to-fi nal turn is made at a relatively low altitude, it is

important that a stall not occur at this point. If an extremely

steep bank is needed to prevent overshooting the proper fi nal

approach path, it is advisable to discontinue the approach, go

around, and plan to start the turn earlier on the next approach

rather than risk a hazardous situation.

Final Approach

After the base-to-final approach turn is completed, the

aircraft should be aligned directly in the extension of the

centerline of the runway. The objective of a good fi nal

approach is to approach the runway with suffi cient energy

(manufacturer’s recommended airspeed) to land at or

beyond some predetermined point. The landing area should

provide suffi cient runway behind for variations in approach

conditions and runway ahead to allow either a full stop or a

go-around if needed.

If there is a crosswind of any kind, the aircraft should be

pointed into the wind slightly (see the Crosswind Approaches

and Landings section). Focus should be to keep the ground

track aligned with the centerline of the runway or landing

surface, so that drift (if any) is recognized immediately. On

a normal approach, with no crosswind drift, the longitudinal

axis should be kept aligned with the runway centerline

throughout the approach and landing.

After aligning the aircraft with the runway centerline, speed

is adjusted as required for the desired rate of descent. Slight

increases in power, if lower than expected, may be necessary

to maintain the descent angle at the desired approach

airspeed.

The descent angle should be controlled throughout the

approach so that the aircraft lands in the center of the runway

at the aiming point, as discussed earlier. The descent angle is

affected by all four fundamental forces that act on an aircraft

(lift, drag, thrust, and weight). If all the forces are constant,

the descent angle is constant in calm air. The pilot can control

these forces by adjusting the airspeed and power. The fi nal

approach sequence is shown in Figures 11-4 through 11-8.

In a descent for fi nal approach, if the WSC is slowed with

an angle of attack that is too high and without an increase

of power, the aircraft settles very rapidly and touches down

short of the desired area. For this reason, the pilot should

never try to stretch a glide by applying forward control bar

pressure alone to reach the desired landing area. Because this

brings the speed below the minimum drag speed, the gliding

distance decreases if power is not added simultaneously.

Figure 11-6. Coming to the runway and increasing speed slightly

within 50 feet of the ground.

Figure 11-7. Maintaining speed and position over the middle of

the runway.

Figure 11-8. Starting the roundout by increasing angle of attack

(AOA) slightly at about 10 to 15 feet above the runway.

Additionally, this is a lower energy approach and may be

slower than the manufacturer’s safe approach speed. The

proper angle of descent to the runway must be maintained at

the minimum speed recommended by the manufacturer, with

a fl atter descent angle obtained with increases in power as

required. Steeper descent angles are obtained with headwinds

or the pilot increasing speed/decreasing the angle of attack,

both of which are covered later in this chapter.

Estimating Height and Movement

During the fi nal approach, roundout, and touchdown, vision is

of prime importance. To provide a wide scope of vision and

to foster good judgment of height and movement, the pilot’s

head should assume a natural, straight-ahead position. The

pilot’s visual focus should not be fi xed on any one side or

any one spot ahead of the aircraft. The pilot should maintain

a deliberate awareness of the runway centerline (if available)

or distance from either side of the runway within his or her

peripheral fi eld of vision.

Accurate estimation of distance is, besides being a matter of

practice, dependent upon how clearly objects are seen; vision

must be focused properly so that important objects stand out

as clearly as possible. Speed blurs objects at close range. For

example, one can note this effect in an automobile moving

at high speed. Nearby objects seem to merge together in a

blur, while objects farther away stand out clearly. The driver

subconsciously focuses the eyes suffi ciently far ahead of the

automobile to see objects distinctly.

The distance at which the pilot’s vision is focused should be

proportionate to the speed at which the aircraft is traveling

over the ground. Thus, as speed is reduced during the

roundout, the focus distance ahead of the aircraft should be

decreased accordingly.

If the pilot attempts to focus on a reference that is too close

or looks directly down, the reference is blurred, and the

reaction is either too abrupt or too late. In this case, the

pilot’s tendency is to overcontrol, round out high, and make a

stalled, drop-in landing. When the pilot focuses too far ahead,

accuracy in judging the closeness of the ground is lost and

the consequent reaction is too slow since there is no apparent

necessity for action. This results in the aircraft fl ying into the

ground nose fi rst without a proper roundout.

The best way to recognize and become accustomed to heights

and speeds for a particular WSC aircraft is to perform low

passes over the runway, as discussed earlier, with energy

management. Perform a normal approach fi rst, then a high-

energy pass at a higher speed, and then medium-energy

passes at lower speeds. These exercises are performed fi rst

in calm winds at a height, as an example, at which the wheels

are 10 feet above the runway, then lowering to just inches

above the runway as the pilot’s skills build. The objective

is to become profi cient at fl ying straight down the runway

centerline at a constant altitude. This exercise provides the

Touchdown

Approach Speed

Start moving control

bar forward to

decrease speed

Start to Increase

Angle of Attack

Continue to move

control bar forward

to decrease speed

Continue to Increase

Angle of Attack

Continue to move

control bar forward

to decrease speed

Continue to Increase

Angle of Attack

Continue to move

control bar forward

to decrease speed

until touchdown

Continue to Increase

Angle of Attack

Start roundout about 15 feet above ground

1 inch

Figure 11-9. Changing angle of attack during roundout by slowly and continuously pushing forward on the control bar until

touchdown.

opportunity to determine height and speed over the runway

before any landings are performed. These should generally

be performed in mild conditions. Higher energy and greater

heights above the runway are required in windier and bumpier

conditions.

Roundout ( Flare)

The roundout is a slow, smooth transition from a normal

approach speed to a landing attitude, gradually rounding out

the fl ightpath to one that is parallel with, and within a very

few inches above, the runway. When the aircraft, in a normal

descent, approaches within what appears to be 10 to 15 feet

above the ground, the roundout or fl are should be started and

be a continuous process slowing until the aircraft touches

down on the ground.

It should be noted that the terms “roundout” and “fl are” are

defi ned and used interchangeably throughout the aviation

industry for slowing the aircraft during fi nal approach and

touching down. The term “roundout” is used in this handbook

since it provides a better description for the WSC landing

process and WSC students are more successful learning

landings using the term roundout instead of fl are.

As the aircraft reaches a height where the back wheels are one

to two inches above the ground, the roundout is continued

by gradually pushing the control bar forward as required to

maintain one to two inches above the runway as the WSC

aircraft slows. [Figure 11-9] This causes the aircraft’s

nosewheel to gradually rise to the desired landing attitude.

The AOA should be increased at a rate that allows the aircraft

to continue fl ying just above the runway as forward speed

decreases until the control bar is full forward and the back

wheels settle onto the runway.

During the roundout, the airspeed is decreased to touchdown

speed while the lift is controlled so the aircraft settles gently

onto the landing surface. The roundout should be executed

at a rate at which the proper landing attitude and the proper

touchdown airspeed are attained simultaneously just as the

wheels contact the landing surface.

The rate at which the roundout is executed depends on the

aircraft’s height above the ground, the rate of descent, and

the airspeed. A roundout started excessively high must be

executed more slowly than one from a lower height to allow

the aircraft to descend to the ground while the proper landing

attitude is being established. The rate of rounding out must

also be proportionate to the rate of closure with the ground.

When the aircraft appears to be descending very slowly, the

increase in pitch attitude (slowing of the WSC) must be made

at a correspondingly low rate.

Visual cues are important in roundout at the proper altitude and

maintaining the wheels a few inches above the runway until

eventual touchdown. Roundout cues are dependent primarily

on the angle at which the pilot’s central vision intersects the

ground (or runway) ahead and slightly to the side. Proper

depth perception is a factor in a successful roundout, but the

visual cues used most are those related to changes in runway or

terrain perspective and to changes in the size of familiar objects

near the landing area such as fences, bushes, trees, hangars,

and even sod or runway texture. The pilot should direct central

vision at a shallow downward angle of 10° to 15° toward the

runway as the roundout is initiated. [Figure 11-10]

Maintaining the same viewing angle causes the point of

visual interception with the runway to move progressively

rearward toward the pilot as the aircraft loses altitude. This is

an important visual cue in assessing the rate of altitude loss.

10° to 15°

Figure 11-10. To obtain necessary visual cues, the pilot should look toward the runway at a shallow angle.

Figure 11-11. Maintaining speed from final approach in the center

of the runway at about 20 feet above the runway.

Figure 11-12. Starting the roundout at about 10 to 15 feet above

the runway surface.

Conversely, forward movement of the visual interception

point indicates an increase in altitude and would mean

that the pitch angle was increased too rapidly resulting in

an over roundout. The following are also used to judge

when the wheels are just a few inches above the runway:

location of the visual interception point in conjunction with

assessment of fl ow velocity of nearby off-runway terrain,

and the similarity in appearance of height above the runway

ahead of the aircraft to the way it looked when the aircraft

was taxied prior to takeoff.

A common error during the roundout is rounding out too much

and too fast. This error can easily be avoided by gradually

increasing the AOA with a controlled descent until the wheels

are one inch above the surface and never climbing during a

roundout with a gradual and controlled roundout.

Touchdown

After a controlled roundout, the touchdown is the gentle

settling of the aircraft onto the landing surface. For calm

air conditions, the roundout can be made with the engine

idling, and touchdown can be made at minimum controllable

airspeed so that the aircraft touches down on the main gear

at the approximate stalling speed. As the aircraft settles, the

proper landing attitude is attained by application of whatever

control bar forward pressure is necessary. In calm wind

conditions, the goal is to round out smoothly and have the

control bar touch the front tube as the back wheels touch the

ground. [Figures 11-11 through 11-14] Once the rear wheel

settles to the surface, the nosewheel settles to the ground. The

control bar should be pulled all the way back to eliminate

the possibility of lifting off the ground because of a wind

gust. Pulling the nose down completely can also be used for

aerodynamic braking if needed.

After-Landing Roll

The landing process must never be considered complete

until the aircraft decelerates to normal taxi speed during the

landing roll or has been brought to a complete stop when clear

of the landing area. Many accidents have occurred as a result

of pilots abandoning their vigilance and positive control after

getting the aircraft on the ground.

Figure 11-13. Continuing the roundout as speed bleeds off and the

WSC back wheels are inches above the runway.

Figure 11-15. WSC aircraft follows the taxi line to exit the runway

while slowing the aircraft and maintaining control of the wing.

Figure 11-14. Completing the roundout with the control bar full

forward and the back wheels settling to the runway.

The pilot must make only slight turns to maintain direction

until the WSC has slowed to taxiing speed. An abrupt turn

at high speed could possibly lift a rear wheel, roll the WSC

over, or force the wingtip to the ground. The WSC must slow

to taxing speed before before any sharp turn can be made to

exit the runway.

The brakes of an aircraft serve the same primary purpose as

the brakes of an automobile—to reduce speed on the ground.

Maximum brake effectiveness is just short of the skid point.

If the brakes are applied so hard that skidding takes place,

braking becomes ineffective. Skidding can be stopped by

releasing the brake pressure. Also, braking effectiveness is

not enhanced by alternately applying and reapplying brake

pressure. The brakes should be applied fi rmly and smoothly

as necessary.

WSC aircraft have nosewheel or rear wheel braking systems.

For nosewheel systems, if braking is required right away, the

nose should be lowered so the nosewheel touches the ground

and the brakes can be applied. The nose should be lowered

for any aerodynamic braking at the higher speeds.

Lowering the nose also provides greater force on the front

wheel for superior braking effectiveness. Any skidding of the

front wheel with braking causes the loss of directional control

of the WSC aircraft and the skidding must be stopped by

letting up on the brake. Skidding can be the greatest problem

operating on slick surfaces such as wet grass. Rear wheel

braking systems are heavier and more complex, but provide

better braking force because there are two wheels instead of

one and there is more weight on the rear wheels. Braking

effectiveness should be evaluated by the pilot for each type

of runway being used. If the available runway permits, the

speed of the aircraft should be allowed to dissipate in a normal

manner with minimum use of brakes. [Figure 11-15]

The control bar serves the same purpose on the ground as

in the air—it changes the lift and drag components of the

wings. During the after-landing roll, the control bar should

be used to keep the wings level in much the same way it is

used in fl ight. If a wing starts to rise, roll control should be

applied to lower it. Procedures for crosswind conditions are

explained further in the Crosswind Approach and Landing

section of this chapter.

Effect of Headwinds During Final

Approach

A headwind plays a prominent role in the gliding distance

over the ground. Strong headwinds decrease the glide as

shown in the comparison in Figure 11-16A with no wind

normal glide versus Figure 11-16B in headwind with steeper

glide. To account for a steeper glide in a headwind, the base

leg must be positioned closer to the approach end of the

runway than would be required with a light wind. Therefore,

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