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Here's a photo of the instrument panel in one of the Club's Cessna
172s. The major instruments and controls are indicated.
Airspeed indicator - displays the speed the airplane is flying
relative to the air moving past it. The instrument is run from a pitot
tube that sticks out into the airflow in front of the left wi
ADF - the Automatic Direction Finder is used for navigation.
The needle on the instrument points to a radio beacon that the pilots
selects.
Altimeter - displays the airplane's height above sea level. The
Altimeter is basically a barometer - when the plane goes up, the air
pressure drops and the instrument shows an increase in altitude. In
this photo the plane is a little below 4000 feet ASL (average sea
level), which is the altitude of the Flying Club at
Springbank Airport.
Attitude Indicator - shows the plane's position relative to the
horizon and tells the pilot if the plane is tilted up, down, left or
right. The instrument is sometimes called an Artificial Horizon.
Control Yoke - has two functions: 1) it turns left/right to
move the ailerons on the wings which bank and turn the plane, and 2)
pulling back or pushing forward moves the elevators at the tail to
make the nose of the plane go up or down.
Engine RPM Gauge - indicates how fast the engine is turning the
propeller and gives the pilot an indication of how much power the
engine is producing.
Flap Control - moves the flaps (surfaces on the back of the
wings) up and down. The flaps are used to increase lift and drag and
are generally used to allow the plane to land at a slower airspeed.
Heading Indicator - is set by the pilot to show the magnetic
heading the plane is flying. The HI is run from a gyroscope inside the
instrument and is more stable in flight than a magnetic compass.
ILS - the Instrument Landing System is used to navigate the
plane to a runway for landing when the pilot can't see - ie. due to
cloud.
Magnetic Compass - indicates direction based on the magnetic
pole. This type of compass tends to bounce around a lot during flight
so it is used in conjunction with the Heading Indicator.
Mixture Control - selects the ratio of fuel to air being burned
in the engine and is adjusted with altitude to help the engine run
most efficiently. See also throttle.
Radios - are used to communicate with ground stations and other
aircraft. Navigation radios are also used to select frequencies for
the ILS, VOR and ADF.
Rudder Pedals - control the left and right movement of the
rudder at the tail. The rudders control steering on the ground in most
aircraft, and control yaw (left/right swinging of the nose of the
plane) during flight.
Throttle - Controls the amount of fuel being burned by the
engine. More fuel = more power = more thrust. See also Mixture
Control.
Transponder - sends a 4-digit code to a radar station whenever
the plane is swept by a radar signal. The transponder may also report
the plane's altitude to the radar station. The coded information is
used by air-traffic controllers to identify aircraft.
Turn Co-ordinator - shows the rate of turn of the aircraft.
Vertical Speed Indicator - uses changes in air pressure to
indicate the rate the plane is climbing or descending.
VOR - the Very High Frequency Omnidirectional Range instrument
is used for navigation. A VOR station on the ground sends out signals
like the spokes of a wheel and the VOR receiver in the aircraft uses
this information to determine which "spoke" the airplane is flying on
and whether the plane is heading to or from the VOR ground station.
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