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Georgie Ground School > TECH > Flashcards

TECH Flashcards

Flight Instruments

1
Q

What is Ineffective Crank Angle?
When does it occur?
What modification does it allow?

A

When the crankshaft continues rotating with minimum piston movement.
Occurs around TDC and BDC,
It allows valve timing to be modified within this range to improve efficiency and power.

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2
Q

What is valve overlap?

What does it achieve?

A

It is when both the inlet and exhaust valves are open together around TDC (end of exhaust, beginning of induction stroke).

1) It assists scavenging of the exhaust gas
2) Allows more fuel and air mixture into the cylinder, increasing the size of charge
3) Improves engine efficiency and power

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3
Q

Describe detonation

A

When pockets of un-burnt fuel and air ignite in advance of the flame front

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4
Q

What are the 4 methods of cooling the engine?

A

1) Air and fuel mixture (outside air temp)
2) Sodium filled exhaust valve
3) Cooling fins and deep baffles
4) Oil jets

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5
Q

What are the oil temperature limits?

A

Max permitted 120 degrees celcius
Min operating 60
MIn for take off 40

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6
Q

What are the oil pressure limits?

A

Max/warm up 100 PSI
Min @ idle 25
Normal 60-90

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7
Q

If oil pressure not achieved on the ground what is the course of action?

A

As quickly as possible, find a safe place to park and shut the engine down as quickly as possible to prevent possible engine damage.

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8
Q

What fuel type does the Tutor use?

A

Avgas 100/110 LL (low leaded)

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9
Q

How much fuel does each tank hold?
What is the total?
What is total unusuable
What is total usuable?

A

Each tank holds 75 L
Total 150 L
Unusuable 7 L
Usuable 143 L

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10
Q

What is the maximum allowable fuel inbalance?

A

20 L

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11
Q

Where is fuel fed to the engine from in inverted flight?

A

The Collector Tank

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12
Q

How much fuel does the collector tank hold?

A

Collector tank holds 5.4 L of fuel, enoguh for approx 5 minutes of flying.

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13
Q

What does the FUEL caption indicate on the Central Warning Panel (CWP)?

A

It indicates that the collector tank is less than half full (2.5L) which provides approx 3 minutes of flying.

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14
Q

What in the airflow and regulation system does the throttle control?

A

The throttle is connected to the butterfly valve (controls the amount of air fed to the engines).

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15
Q

What are the components of the ignition system?

A

1) Magneto switch/ ignition switch
2) Low tension leads
3) Magneto assembly
4) High tension leads
5) Spark plugs

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16
Q

What is a SlickStart booster system?

Used to overcome hard starting issues caused by what 4 things?

A

SlickStart improves aircraft engine starting by delivering 400% more spark energy to an aircraft’s spark plugs.
(automatically kicks in when Left mag selected)

1) fouled spark plugs
2) poor priming
3) hot engine restarts
4) extreme cold weather

17
Q

What is the engine testing sequence (magneto serviceability check)?

A

1) Taxi to engine running area, turn the aircraft into wind, nose wheel straight, parking brake set and applied.
2) Throttle - set 2000 rpm
3) Select R/ BOTH/ L/ BOTH
- Min drop 50 rpm
- Max drop 175 rpm
- Max difference between magnetos 50 rpm
4) Select BOTH, check engine restores to 2000 rpm

18
Q

What are the magneto serviceability checks before and after flight ensuring?

A

Before flight checking serviceability and efficiency.

After flight checking serviceability and safety.

19
Q

Describe the structure of the Grob G 115E Tutor?

A

The Grob G 115E Tutor is a:

1) 2-seater
2) fully aerobatic
3) single engine aircraft

Consists of:

1) a semi-monocoque fuselage
2) with cantilevered wing
3) conventional tail section
4) constructed mainly from carbon-fibre reinforced plastic

20
Q

What is a Flettner Strip?

A

Where the trailing edge of the rudder has been splayed out to cause the air to separate and create turbulence or vortices.

1) Dampens out flutter at high speeds and
2) the pressure created increases feel of feedback on the rudder pedals.

21
Q

What is the Flap Check sequence?

A

Select FULL, check correct operation and indication
Select UP, correct operation and indication
(look out to check the flaps are in the correct position and check the correct indication using the flap indicator)

22
Q

How do you apply the parking brake?

A

1) Gently bring the aircraft to a halt by applying pressure to the toe portion of the rudder pedals (toe brakes)
2) Keep toe brakes pushed down
3) Slide parking brake lever to the SET position
4) Release pressure on toe brakes
5) Pump pedals twice, APPLIED

To release the brakes, move the parking brake lever to release.

23
Q

How to open and close the canopy on the ground?

A

Move the canopy operating lever to the unlocked position and slide the canopy rearwards.
The external lever must only be used to unlock the canopy and NOT to drag it open.

24
Q

What is the canopy ventilation position procedure?

A

1) Aircraft speed 80 kts or less
2) Canopy unlocked
3) Slide canopy slightly rearwards by 10 cm
4) Close canopy lever and slide canopy forwards
5) Canopy HELD in this slightly open position by the slipstream

25
Q

What is the gas in the fire extinguisher?

What must you be aware of with the gas?

A

HALON - this gas is midly toxic when stored and highly toxic when released onto a fire.

26
Q

What is the fumes in the cockpit drill?

A

1) Cockpit heating controls - COLD, SCREEN
2) Cold air vents - OPEN
3) Speed below 80 kts if possible
4) Canopy - set to ventilation position
5) CO detector - check for discolouration
6) Land ASAP

27
Q

What is the propeller after start test?

A

1) Taxi to engine running area, turn the aircraft into wind, nose wheel straight, parking brake set and applied.
2) Throttle - set 2000 rpm
3) Move the RPM lever from HIGH to LOW
4) Allow RPM to decrease by 500 rpm (due to increased workload)
5) Anticipate arrival at 1500 rpm, at this point move RPM lever back to HIGH and repeat a further two times

Tests serviceability

28
Q

What are the 5 CWP warnings and what are the conditions for them appearing?

A

LO VOLT- Essential Busbar 25V +/- 0.5V, unserviceable battery or excessive load

STARTER- Power is being supplied to the starter

Fuel- Fuel level in the collector tank is less than 1/2 full (2.5L) giving approx 3 minutes of flying time

GEN- Generator not supplying the correct voltage

LO OIL- Engine oil pressure below 25 psi

29
Q

When Battery Master Switch is ON, what do the ammeter and voltmeter read?

A

Ammeter reads slightly negative

Volt meter reads >23.5v

30
Q

When Generator is ON, what do the ammeter and voltmeter read?

A

Ammeter after start; positive reading, 1 minute after start; max 10 amps.
Volt meter; reads 28v

31
Q

If the battery turns off in flight?

A

No indication
No trickle charge
No backup

Georgie Ground School (9 decks)

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