A102 DA-20 Aircraft Systems

Question 1

What are ailerons, where are they, and how are they actuated?

Answer 1

Aileron - Trailing Edge of the Wing - Control Stick L/R to push rods - Roll (Longitudinal)

Question 2

What is the elevator, where is it, and how is it actuated?

Answer 2

Elevator - Horizontal Stabilizer (T-Tail) - Control Stick Fwd/Aft to push rods - Pitch (Lateral)

Question 3

What type of flaps are on the DA-20, how are they operated, and where are they located?

Answer 3

• Slotted flaps
• On wings close to the fuselage
• Operated by an electric flap actuator
• Flap switch is located on the instrument panel

Question 4

What are the rudders, where are they, and how are they actuated?

Answer 4

Rudder - Vertical Stabilizer - Rudder Pedals to cables - Yaw (Vertical)

Question 5

What are the Flap Settings (Degrees)

Answer 5

• CRUISE - 0
• T/O - 15
• LDG - 45

Question 6

Explain Four Stroke Engine Operation

Answer 6

1. Intake (piston goes down, fuel air mix enters through intake valve)
2. Compression (piston goes up, intake valve closes, fuel/air mix compressed)
3. Power (fuel/air ignited and explodes, piston is pushed down, this pushes the crankshaft)
4. Exhaust (intake valve opens to expel burned gas, piston moves up)

Question 7

DA-20 Flight/Performance Instruments

Answer 7

1. Magnetic Compass
2. Vacuum Gauge
3. Engine Tachomete
4. Airspeed Indicator
5. Attitude Indicator
6. Altimeter
7. Course Deviation Indicator (CDI)
8. Turn Coordinator
9. Heading Indicator
10. Vertical Speed Indicator (VSI)

Question 8

DA-20 Engine Insturments

Answer 8

1. Cylinder Head Temperature (CHT)
2. Exhaust Gas Temperature (EGT)
3. Fuel Pressure
4. Fuel Quantity
5. Oil Temperature
6. Oil Pressure
7. Ammeter
8. Voltmeter

Question 9

What is the purpose of an aircraft’s oil system?

Answer 9

The engine oil system performs several functions to include:
Cooling, Cleaning, Sealing, Lubrication
* Lubrication of the engine’s moving parts.
* Cooling the engine by reducing friction.
* Removing heat from the cylinders.
* Providing a seal between the cylinder walls and pistons.
* Carrying away contaminants which cleans the engine.

Question 10

Oil System Pathway

Answer 10

Wet Oil Sump → Engine-Driven Oil Pump → Oil Filter → Vernatherm (Cool Flow) or to Oil Cooler (Hot Flow) → Engine Cylinders, Components & Accessories

Question 11

What Fuel does the DA-20 use, what is the approx burn rate, and weight per gallon

Answer 11

Approved fuel grades: AVGAS 100LL or 100
Fuel weighs approximately 6 pounds per gallon.
The DA20-C1 fuel burn rate is approximately 6 gallons/hour.

Question 12

Fuel System Pathway

Answer 12

Fuel Tank → Gascolator → Duke’s Fuel Pump or Bypass → Fuel Shutoff Valve → Engine Driven Pump (and swirl chamber) → Fuel Control Unit → Fuel Distribution Manifold → Fuel Injector Nozzles → Engine Cylinders.

Question 13

Which Magneto Powers Lower Spark Plugs

Answer 13

Right Magneto

Question 14

Which Magneto Powers Upper Spark Plugs

Answer 14

Left Magneto

Question 15

Ignition System Pathway

Answer 15

Ignition Switch → Magnetos → Ignition Wires → Spark Plugs

Question 16

Electrical System Pathway

Answer 16

Battery/Alternator → Electrical Wiring → Electrical Bus → Circuit Breakers
→ Electrical Equipment

Question 17

Brake System Pathway

Answer 17

Brake Fluid Hydraulic Reservoirs → Brake Lines → Parking Brake
Mechanism → Disc Brakes

Question 18

Where are the DA-20 antennae located?

Answer 18

• VHF radio (COM 1) in the vertical stabilizer
• NAV equipment (VOR) in the horizontal stabilizer

Question 19

What is contained in the pitot-static system? (What needs ram air to work)

Answer 19

• Pitot-static probe below the left wing
• Airspeed indicator (ASI) [pitot AND static]
• Altimeter
• Vertical speed indicator (VSI)
• Transponder Mode C [bc barometric alt]

Question 20

What are the 4 warning lights in the DA-20?

Answer 20

• GEN warning
• CANOPY warning
• START warning
• EPU warning

Question 21

What lighting systems are in the DA-20?

Answer 21

• Map
• Strobe
• Position
• Taxi
• Landing
• EPU

Question 22

What are the elements of the vacuum system?

Answer 22

• Engine-driven vacuum pump
• Air filter
• Attitude Indicator
• Heading Indicator
• Vacuum Gauge

Question 23

What is the maximum temperature for operation of the GFRP composite
structure for the DA-20? Where is the warning light located?

Answer 23

131°F (55°C)

The indicator is located between the seat back cushions and may be viewed by parting the seat back cushions. At temperatures below 55° C (131° F), the indicator is solid red. Above 55°C, it displays a contrasting red “55” on a black background.
At ambient temperatures above 38° C (100° F) the indicator must be checked prior to flight.

Question 24

What are the 9 antennae on the DA20?

Answer 24

GPS (Embedded, behind canopy)
NAV (Embedded, Horizontal Stabilizer)
COM 1 (Embedded, Vertical Stabilizer)
COM 2
Transponder
Marker
TAS (Top)
TAS (Under)
ELT

Question 25

Where is the EPU plug in?

Answer 25

On the IP side

Question 26

What does the Ammeter display?

Answer 26

The ammeter displays the current flowing between the battery and the main bus

Question 27

What does it mean when amperage is positive or negative?

Answer 27

When the amperage is
positive, the battery is receiving a charge. When the amperage is negative, the battery is supplying
current to the bus.

Question 28

What does the voltmeter display, and what does it read when the alternator is operating vs when it is not?

Answer 28

The voltmeter displays the voltage on the main bus. When the alternator is operating the voltage is
normally about 14 volts. When the alternator is not operating (such as before engine start) the battery
voltage is displayed.

Question 29

What are the volts/amps of the battery?

Answer 29

12V/20Amp

Question 30

What are the volts/amps of the alternator?

Answer 30

14V/40Amp