Utilizing your notes and past knowledge answer the following questions:

1) Describe the four types of airspeed.2) Describe the meaning of the white arc on

the ASI.3) Describe the upper limit of the white arc

(VFE). 4) Describe VNE5) What is the indication on the ASI if both the

pitot tube opening and the drain hole should become clogged simultaneously?

Warm-Up – 3/31 – 10 minutes

Questions / Comments

Utilizing your notes and past knowledge answer the following questions:

1) Describe the four types of airspeed.2) Describe the meaning of the white arc on

the ASI.3) Describe the upper limit of the white arc

(VFE). 4) Describe VNE5) What is the indication on the ASI if both the

pitot tube opening and the drain hole should become clogged simultaneously?

Warm-Up – 3/31 – 10 minutes

AirSpeed Indicator (ASI)• Multiple types of

airspeeds.

• Indicated airspeed (IAS)—the direct instrument reading obtained from the ASI

• Calibrated airspeed (CAS)—IAS corrected for installation error and instrument error.

AirSpeed Indicator (ASI)• True airspeed (TAS)—

Because air density decreases with an increase in altitude, an aircraft has to be flown faster at higher altitudes to cause the same pressure difference between pitot impact pressure and static pressure.

• TAS increases as altitude increases.

AirSpeed Indicator (ASI)

• Groundspeed (GS)—the actual speed of the airplane over the ground.

• It is TAS adjusted for wind.

• GS decreases with a headwind, and increases with a tailwind.

Utilizing your notes and past knowledge answer the following questions:

1) Describe the four types of airspeed.2) Describe the meaning of the white arc on

the ASI.3) Describe the upper limit of the white arc

(VFE). 4) Describe VNE5) What is the indication on the ASI if both the

pitot tube opening and the drain hole should become clogged simultaneously?

Warm-Up – 3/31 – 10 minutes

AirSpeed Indicator Markings• Standard color-coded

markings:• White arc — commonly

referred to as the flap operating range since its lower limit represents the full flap stall speed and its upper limit provides the maximum flap speed.

• Approaches and landings are usually flown at speeds within the white arc.

Utilizing your notes and past knowledge answer the following questions:

1) Describe the four types of airspeed.2) Describe the meaning of the white arc on

the ASI.3) Describe the upper limit of the white arc

(VFE). 4) Describe VNE5) What is the indication on the ASI if both the

pitot tube opening and the drain hole should become clogged simultaneously?

Warm-Up – 3/31 – 10 minutes

AirSpeed Indicator Markings• Lower limit of white

arc (VS0)—the stalling speed or the minimum steady flight speed in the landing configuration.

• Maximum landing

weight in the landing configuration (gear and flaps down).

• Upper limit of the white arc (VFE)—the maximum speed with the flaps extended.

Utilizing your notes and past knowledge answer the following questions:

1) Describe the four types of airspeed.2) Describe the meaning of the white arc on

the ASI.3) Describe the upper limit of the white arc

(VFE). 4) Describe VNE5) What is the indication on the ASI if both the

pitot tube opening and the drain hole should become clogged simultaneously?

Warm-Up – 3/31 – 10 minutes

AirSpeed Indicator Markings

• Red line (VNE)—never exceed speed.

• Operating above this speed is prohibited since it may result in damage or structural failure.

Utilizing your notes and past knowledge answer the following questions:

1) Describe the four types of airspeed.2) Describe the meaning of the white arc on

the ASI.3) Describe the upper limit of the white arc

(VFE). 4) Describe VNE5) What is the indication on the ASI if both the

pitot tube opening and the drain hole should become clogged simultaneously?

Warm-Up – 3/31 – 10 minutes

Blockage of the Pitot-Static System

• If both the pitot tube opening and the drain hole should become clogged simultaneously, no change is noted on the airspeed indication should the airspeed increase or decrease.

Questions / Comments

March 31

• 1912 — The world's first hydroplane competitions, held in Monaco, over the past week, has been a runaway success for Farman biplanes.

• Belgian Jules Fisher is the overall winner.

• He is one of only two non-French pilots of the eight starters and flies a Henry Farman machine.

THIS DAY IN AVIATION

March 31

• 1936 — Airship “Hindenburg” makes round-trip between Friedrichshafen, Germany and Rio de Janeiro, Brazil.

THIS DAY IN AVIATION

March 31

• 1966 — The USAF's Strategic Air Command phased out its last Boeing B-47 “Stratojet” tactical aircraft.

THIS DAY IN AVIATION

March 31

• 1975 — A specially modified Royal Canadian Air Force de Havilland CC-115 (DHC-5 “Buffalo”) makes its first flight carrying an inflatable air-cushion landing system beneath the fuselage.

THIS DAY IN AVIATION

March 31

• 1979 — The British government announces development and production costs for the “Concorde” supersonic airliner since November 29, 1962, when agreement was reached with France to design and built the aircraft.

• Through December 31, 1978, the French government spent a total of £920 million whereas the British spent £898 million.

• The total cost of £1.818 billion would increase by a further £163 million, before government funding ceased.

THIS DAY IN AVIATION

Questions / Comments

SUNDAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY

30 31

Chapter 7

Gyro Systems

 1  2

Chapter 7

Magnetic Compass

 3  4

FltLine Friday

Chapter 7 Test

 5

         

6 7 8

Chapter 8

Flight Manuals

9 10

Chapter 9

Weight & Balance

11 12

             

13 14

SPRING BREAK

15

SPRING BREAK

16

SPRING BREAK

17

SPRING BREAK

18

SPRING BREAK

19

             

20 21 22 23 24 25

FltLine Friday

26

             

27 28 29 30

             

March/April 2014

Questions / Comments

Chapter 7 – Flight InstrumentsFAA – Pilot’s Handbook of Aeronautical Knowledge

Mission: Identify in writing how to interpret and operate flight instruments.

Describe the pilot’s ability to recognize errors and malfunctions with flight instruments.

Describe the pitot-static system and associated instruments.

Describe the vacuum system and related instruments.

Describe the gyroscopic instruments and the magnetic compass.

EQ: Describe the importance of Aeronautical Knowledge for the

student pilot learning to fly.

Today’s Mission Requirements

Gyroscopic Flight Instruments

• Several flight instruments utilize the properties of a gyroscope for their operation.

• The most common instruments containing gyroscopes are the turn coordinator, heading indicator, and the attitude indicator.

Gyroscopic Flight Instruments

• Precession can also create some minor errors in some instruments.

• Instruments may require corrective realignment during flight, such as the heading indicator.

Gyroscopic Flight Instruments

Sources of Power• Gyros are vacuum,

pressure, or electrically operated.

• Most aircraft have at least two sources of power to ensure at least one source of bank information is available if one power source fails.

Gyroscopic Flight Instruments

Sources of Power

• The vacuum or pressure system spins the gyro by drawing a stream of air against the rotor vanes to spin the rotor at high speed, much like the operation of a waterwheel or turbine.

Gyroscopic Flight Instruments

Sources of Power• Pressure required for instrument operation varies, but is usually between 4.5 "Hg and 5.5 "Hg.

• One source of vacuum for the gyros is a vane-type engine-driven pump that is mounted on the accessory case of the engine.

Gyroscopic Flight Instruments

Sources of Power

• A typical vacuum system consists of an engine-driven vacuum pump, relief valve, air filter, gauge, and tubing necessary to complete the connections.

Gyroscopic Flight Instruments

Sources of Power• Air is drawn into the

vacuum system by the engine-driven vacuum pump.

• It first goes through a filter, which prevents foreign matter from entering the vacuum or pressure system.

Gyroscopic Flight Instruments

Sources of Power• The air then moves

through the attitude and heading indicators, where it causes the gyros to spin.

• A relief valve prevents the vacuum pressure, or suction, from exceeding prescribed limits.

Gyroscopic Flight Instruments

Sources of Power• It is important to

monitor vacuum pressure during flight, because the attitude and heading indicators may not provide reliable information when suction pressure is low.

Gyroscopic Flight Instruments

Sources of Power• When the vacuum

pressure drops below the normal operating range, the gyroscopic instruments may become unstable and inaccurate.

Turn Indicators

• Aircraft use two types of turn indicators: turn-and-slip indicator and turn coordinator.

• The turn-and-slip indicator shows only the rate of turn in degrees per second.

Turn Indicators• The turn coordinator

can initially show roll rate and it indicates rate of turn.

• Both instruments indicate turn direction and quality (coordination), and also serve as a backup source of bank information in the event an attitude indicator fails.

Turn Indicators• Coordination is achieved by referring to

the inclinometer, which consists of a liquid-filled curved tube with a ball inside.

Turn-and-Slip Indicator• The gyro in the turn-and-slip indicator

rotates in the vertical plane, corresponding to the aircraft’s longitudinal axis.

Turn-and-Slip Indicator• The turn-and-slip indicator uses a

pointer, called the turn needle, to show the direction and rate of turn.

Turn Coordinator• The gimbal in the

turn coordinator is canted; therefore, its gyro can sense both rate of roll and rate of turn.

• When rolling into or out of a turn, the miniature aircraft banks in the direction the aircraft is rolled.

Turn Coordinator

• The turn coordinator can be used to establish and maintain a standard-rate turn by aligning the wing of the miniature aircraft with the turn index.

Turn Coordinator• Two marks on each

side (left and right) of the face of the instrument.

• The first mark• a wings level

zero rate of turn. • The second mark

• indicate a standard rate of turn.

Turn Coordinator

• A standard-rate turn is defined as a turn rate of 3° per second.

• The turn coordinator indicates only the rate and direction of turn; it does not display a specific angle of bank.

Inclinometer• The inclinometer is

used to depict aircraft yaw.

• Coordinated flight is maintained by keeping the ball centered.

• If the ball is not centered, it can be centered by using the rudder.

Inclinometer

• To center the ball, apply rudder pressure on the side to which the ball is deflected.

• Use the simple rule, “step on the ball,” to remember which rudder pedal to press.

InclinometerInstrument Check

• During the preflight, check to see that the inclinometer is full of fluid and has no air bubbles.

• The ball should also be resting at its lowest point.

• When taxiing, the turn coordinator should indicate a turn in the correct direction while the ball moves opposite the direction of the turn.

Attitude Indicator• The attitude indicator,

with its miniature aircraft and horizon bar, displays a picture of the attitude of the aircraft.

• The relationship of the miniature aircraft to the horizon bar is the same as the relationship of the real aircraft to the actual horizon.

Attitude Indicator• The instrument gives an

instantaneous indication of even the smallest changes in attitude.

• The horizon bar represents the true horizon.

Attitude Indicator

• The relationship of the miniature aircraft to the horizon bar should be used for an indication of the direction of bank.

Attitude Indicator

• The attitude indicator is reliable and the most realistic flight instrument on the instrument panel.

Heading Indicator• The heading indicator

is fundamentally a mechanical instrument designed to facilitate the use of the magnetic compass.

• Errors in the magnetic compass are numerous, making straight flight and precision turns to headings difficult to accomplish, particularly in turbulent air.

Heading Indicator

• Because of precession caused by friction, the heading indicator creeps or drifts from a heading to which it is set.

Heading Indicator• Another error in the

heading indicator is caused by the fact that the gyro is oriented in space, and the Earth rotates in space at a rate of 15° in 1 hour.

• The heading indicator may indicate as much as 15° error per every hour of operation.

Heading IndicatorInstrument Check

• As the gyro spools up, make sure there are no abnormal sounds.

• While taxiing, the instrument should indicate turns in the correct direction, and precession should not be abnormal.

Questions / Comments