Operations of systems

Question 1

Airspeed Indicator

Answer 1

This is the only instrument that uses both the pitot and static ports. It measures the difference between dynamic pressure and static pressure. Ram air exerts a force into the diaphragm inside the instrument.

Question 2

Altimeter

Answer 2

Measures the difference between static pressure inside of the instrument case and standard pressure. (29.92 Hg) When the airplane is climbing the ambient pressure begins to decrease, the wafer is able to expand because the air that is sealed inside is now full of pressure.

Question 3

VSI

Answer 3

Measures the difference between static pressure and static pressure that is subject to a calibrated leak approx. every 6-9 seconds.

Question 4

Describe the gyroscopic instruments

Answer 4

The gyroscopic instruments are powered by an engine driven vacuum pump with the exception of the turn coordinator which is electrically powered.

Question 5

Rigidity in space

Answer 5

While spinning a gyroscope will tend to stay fixed in its plane rotation. Think of a bicycle wheel. With enough momentum, you are able to naturally stay balanced.

Question 6

Precession

Answer 6

When a force is applied to a gyroscope, the resultant force is 90 degrees ahead in the direction of the rotation.

Question 7

Attitude Indicator

Answer 7

Rotates in the horizontal plane and operates off of the principle of rigidity in space.

Question 8

Heading Indicator

Answer 8

Rotates in the vertical plane and operates in rigidity in space.

Question 9

Turn Coordinator

Answer 9

Electrically powered gyro rotates in the vertical plane and it uses precession to measure rate of turn and rate of roll.

Question 10

DOVMAN

Answer 10

1.Deviation- A compass is not only influenced by the Earth’s magnetic field, but by the magnetism of the iron used in the construction of the aircraft as well.
2.Oscillation error- A combination of all of these errors and results in the compass swinging back and forth around the headings being flown.
3. Variation- The angle between the magnetic and geographic meridians at any place, expressed in degrees and minutes east or west to indicate the direction of magnetic north from true north.
4. Magnetic dip- The tendency of the compass to point directly at magnetic North.
5. Acceleration Error- While on east and west headings, acceleration results in a slight turn to the North. Deceleration results in a slight turn to the South. ANDS
6. Northerly turn errors- The pull of the vertical component of the Earth’s magnetic field.

Question 11

LHAND

Answer 11

1. Lycoming
2. Horizontally opposed
3. Air cooled
4. Normally aspirated
5. Direct drive

Question 12

What is used to cool the engine?

Answer 12

Air intakes at the front of the engine cowling allow outside air to cool the cylinders.

Question 13

Why do we need oil in the engine?

Answer 13

1. Lubricates
2. Cools
3. Seals
4. Cleans

Question 14

What is meant by four-stroke?

Answer 14

1. Intake
2. Compression
3. Power
4. Exhaust