XX. C172 Systems and Limitations

Question 1

Max HP in the Cessna 172S

Answer 1

180HP at 2700RPM

Question 2

Max GTW in the C172S

Answer 2

Normal: 2,550 LBS
Utility: 2,200 LBS

Question 3

Max Landing Weight in the C172S

Answer 3

Normal: 2,550 LBS
Utility: 2,200 LBS

Question 4

Max Ramp Weight in the C172S

Answer 4

2,558 LBS

Question 5

VSO in the C172S

Answer 5

40KIAS
Stall speed in the landing config (Bottom White)

Question 6

VS in the C172S

Answer 6

48KIAS
Stall speed in the clean config (Bottom green)

Question 7

VX in the C172S

Answer 7

62KIAS
Best Angle of Climb Speed

Question 8

VY in the C172S

Answer 8

74KIAS
Best Rate of Climb Speed

Question 9

VA in the C172S

Answer 9

90KIAS @ 1,900lbs
105KIAS @ 2,550lbs
Maneuvering Speed

Question 10

VR in the C172S

Answer 10

55KIAS
Rotation Speed

Question 11

VFE 10º in the C172S

Answer 11

110KIAS
Max Flap Extension Speed with 10º of Flaps

Question 12

VFE 20-30º in the C172S

Answer 12

85KIAS
Max Flap Extension Speed with 20-30º Flaps (Top of White)

Question 13

VNO in C172S

Answer 13

129KIAS
Maximum structural cruise speed (Top of Green)

Question 14

VNE in C172S

Answer 14

163KIAS
Never Exceed Speed (Red Line)

Question 15

VG in C172S

Answer 15

68KIAS
Best Glide Speed

Question 16

Max Usable Fuel in C172S

Answer 16

TOTAL: 53 gal.
26.5 gal Each Tank

Question 17

Max Fuel Capacity in C172S

Answer 17

TOTAL 56 gal.
28 gal each tank

Question 18

Describe the engine on the C172S.

Answer 18

Lycoming IO-360 L2A
- 4 cylinders
- Normally aspirated
- Fuel Injected
- Horizontally Opposed
- Air cooled
- Produces 180HP at 2700RPM
- Ignition provided by 2 magnetos, powering 8 spark plugs.

Question 19

Describe the propeller on your C172S.

Answer 19

• McCauley
• 76 inch
• Two blade, All metal
• Fixed Pitch

Question 20

What type of flaps does the C172S have?

Answer 20

• Single slot-type flaps
• Driven by electric motor
• 0º, 10º, 20º and 30º

Question 21

What is the oil capacity in the C172S?
What is the minimum?

Answer 21

8 Quarts
Do not operate < 5 QT

Question 22

How does ground steering work on the C172S?

Answer 22

Nose wheel is linked to the rudder pedals by a spring-loaded steering bungee which turns the nose up to 10° each side of center.

Differential braking allows for up to 30° of steering either side of center

Question 23

Describe the electrical system on the C172S NAVIII.

Answer 23

SYSTEM: 28-volt DC
BATTERY: 24-volt lead-acid battery.
STBY BATTERY: 24-volt
ALTERNATOR: 60-Amp
EXTERNAL POWER: receptacle located on left engine cowl.

Electrical power is distributed through electrical buses and circuit
breakers.

Question 24

What are the indications of a failed alternator?

Answer 24

• LOW VOLTS annunciation
• M Volts show discharge on ammeter
• Run checklist

Question 25

Describe the ignition system on the C172S.

Answer 25

TWO ENGINE DRIVEN MAGNETOS mounted on the back of the engine.

Each magneto powers one spark plug in each cylinder (for a total of 8), providing redundancy and more complete combustion.

Magnetos are independent of the aircraft’s electrical system and each other.

Question 26

How many fuel sumps are on the C172S?

Answer 26

13 TOTAL
5 under each wing
3 under the cowl/fuselage

Question 27

How many fuel vents are on the C172S?

Answer 27

3 TOTAL
1 under left wing
1 inside each fuel cap

Question 28

Give a brief description of the fuel system on the C172S.

Answer 28

Consists of 2 tanks in the wings Total fuel capacity 56G/53 Usable
Fuel is gravity-fed to a three-position fuel selector valve (BOTH/RIGHT/LEFT), and then to a reservoir tank.
From the reservoir, fuel flows to an auxiliary fuel pump, past the fuel
shutoff valve, through the strainer and to an engine-driven fuel pump. Fuel is then delivered to the fuel/air control unit where it is metered and passed to a manifold
where it is distributed to each cylinder.

Question 29

What is the maximum weight in the baggage area on the C172S?

Answer 29

120LBS

Question 30

Give a brief description of the PITOT/STATIC SYSTEM on the C172S.

Answer 30

PITOT TUBE on the left wing provides ram air pressure to the airspeed indicator
STATIC PORT on the left side of the fuselage provides static pressure to the altimeter, vertical speed indicator and airspeed
indicator.

The pitot tube is electrically heated to prevent ice.
Alternate static source is located under the instrument panel for use in the event of static port blockage.