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DA42 Ground Course > DA42 > Flashcards

DA42 Flashcards

1
Q

What is the airframe composed of?

A

GFRP and CFRP is used where ADDITIONAL STRENGTH is required

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2
Q

What are the characteristics of GFRP and CFRP?

A

CARBON/GLASS fibres BONDED together by RESIN;
FIBRES give STRENGTH, RESIN holds SHAPE and BONDS to other structural COMPONENTS;
GFRP is STRONG and FLEXIBLE;
CFRP is STRONG and RIGID

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3
Q

What type of construction is the DA42?

What are the characteristics of this?

A

SANDWICH construction, 2 SKINS and a CORE;
SKINS are made from GFRP and CFRP;
CORE is made from RIGID FOAM

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4
Q

What type of fuselage does the DA42 have?

What other feature is directly made with the fuselage?

A

28’6” SEMI MONOCOQUE made from 2 CFRP SHELL and GFRP FRAMES and WEBS;
VERTICAL STABILISER

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5
Q

Where does the centre section have mountings?

A

MOUNTINGS for the wings through FRONT and AFT SPAR BRIDGES, ENGINE NACELLES and MAIN GEAR

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6
Q

What type of wings does the DA42 have?

A

44’ CANTILEVER SEMI MONOCOQUE;
2 CFRP SHELLS with RIGID FOAM CORE;
2 I SECTION SPARS;
SANDWICH construction with ALUMINIUM TANKS

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7
Q

What are the advantages/disadvantages of GFRP?

A

STRONG and LIGHT;

DAMAGE is DIFFICULT to REPAIR, EXPENSIVE, ADHESIVE FAILURES

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8
Q

What is the construction of the horizontal stabiliser in the DA42?

A

2 GFRP SHELLS;

FRONT and REAR SPAR to give STRENGTH and house ELEVATOR HINGES

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9
Q

Hos is the DA42 protected from lightning?

A

A LATERAL and LONGITUDINAL ALUMINIUM ALLOY branch that CONNECTS ALL METAL components through additional METAL BRAIDING and STRIPS

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10
Q

How is static build up discharged from the DA42?

A

ELECTROCHEMICAL FILLER is used to allow flow of electricity as the composite structure does not;
The electricity travels to (7) STATIC WICKS and can be discharged

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11
Q

What component allows the function of ailerons and elevators?
What component allows the function of rudder?
What additional features does the elevator and rudder have?

A

PUSH/PULL RODS;
CABLES;
ELECTRIC and MANUAL TRIM

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12
Q

What are the ailerons made of?
How many hinges are there and why must they be checked in the preflight?
What are 2 special aerodynamic features?

A

CFRP SHELL, RIGID FOAM CORE, CFRP INNER SKIN;
4 HINGES secured by ROLL PIN, LOCK NUT must be secured TIGHT against PUSH ROD;
DIFFERENTIAL AILERONS and AILERON PADDLE to combat ADVERSE YAW

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13
Q

What are the flaps made of?
How many hinges are there?
Is there a back up system?

A

CFRP SHELLS, RIGID FOAM CORE, GFRP INNER SKIN;
OUTER: 6 connected to wing;
INNER; 4 connected to centre wing;
INBOARD flap has TOUNGE that slots into OUTBOARD flap for FLAP FOLLOWING if a CONTROL ROD is SEPERATED

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14
Q

How many positions of flap are there?

How are they operated?

A

UP/CRUISE, APPROACH (137kt), LANDING (111kt);

ACTUATED through PUSH/PULL RODS

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15
Q

What is the variable elevator stop?

A

ELECTRIC driven ACTUATOR limits to 13 degrees exceeding approx 25% power/14”;
LINEAR ACTUATOR is movable stop controlled by 2 SWITCHES on THROTTLE;
FULL TRAVEL 15.5 degrees BELOW 25%;
AMBER STICK LIGHT indicates malfunction;
ANNUNCIATIONS INOPERATIVE when 1 THROTTLE ABOVE APPROACH POWER with other BELOW/IDLE

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16
Q

What are the 2 actuating levers of the elevator trim?

A

LEFT: Connects to LONG FLEXIBLE CABLE adjustable by pilot;
RIGHT: DAMPENS FRICTION and PREVENTS FLUTTER if fails

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17
Q

What is the rudder made of?

What is the additional feature?

A

GFRP SHELLS, RIGID FOAM CORE;

MASS BALANCE WEIGHT near top LEADING EDGE

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18
Q

What are the main components of rudder trim?

A

FLEXIBLE CABLE: Connects HAND WHEEL to trim ACTUATOR assembly;
2 OPERATING RODS: Connects ACTUATOR assembly to the TRIM TAB CONTROL HORN

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19
Q

How is the gear operated and powered?

A

HYDRAULICALLY OPERATED ELECTRICALLY POWERED

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20
Q

What is the gear made of?

How is the wheel attached?

A

TUBULAR STEEL forming STRUT with TRAILING LINK at bottom;

TRAILING LINK

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21
Q

How do the dampers move in the gear?

Where are they attached

A

GAS/OIL COMPRESS QUICKLY EXPAND SLOWLY;

REAR of TUBULAR STEEL STRUT and TRAILING LINK

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22
Q

What are the components of the hydraulic control block?

A 
ELECTRIC MOTOR;
HYDRAULIC PUMP and PRESSURE SWITCH;
HYDRAULIC RESERVOIR;
HYDRAULIC ACCUMULATOR;
REAR of AFT COCKPIT BULKHEAD LEFT SIDE
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23
Q

What engines does the DA42 have?

A

LEFT: IO 360 M1A 180HP
RIGHT: LIO 360 M1A 180HP
AIR COOLED 4 CYLINDER 4 STROKE HORIZONTALLY OPPOSED FUEL INJECTED DIRECT DRIVE

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24
Q

What are the limitations of the engines?

A

MAX CONTINUOUS RPM: 2700;
5 MINS FULL THROTTLE 2 engines;
NO LIMIT FULL THROTTLE 1 engine;
MAX CONTINUOUS HP: 160

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25
Q

What is the purpose of each air intake?

A

LEFT: COOLING for cylinder HEADS
RIGHT: COOLING for cylinder HEADS and ALTERNATOR and provides AIR for CABIN HEAT
BENEATH: ENGINE air INTAKE

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26
Q

What is the type of exhaust?
What is the type of oil system?
What is the starter system?

A

POWER FLOW exhaust;
WET SUMP;
During start: SLICKSTART, After start: CONVENTIONAL MAGNETO system

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27
Q

What are the fuel tanks made from?
How much do they hold?
How is fuel quantity measured?

A

2 ALUMINIUM each with 3 chambers;
50 USG USABLE 1 USG UNUSABLE;
CAPACITANCE type probe

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28
Q

What are the fuel selector settings?

Are there any safety features?

A

ON: Tanks feed their own engine;
CROSS FEED: One engine will take fuel from the OPPOSITE TANK;
SHUT OFF: TANKS will CUT supply to their ENGINE;
SAFETY GUARD prevents INADVERTENT OFF

29
Q

How do the low level sensors operate?

A

Between 3-5 USG FLOAT triggers MICRO SWITCH on INBOARD SECTION of INBOARD CHAMBER which sends electrical signal to G1000

30
Q

What is the capacity of auxiliary tank?
Does it indicate on G1000?
Are there any saftey features?

A

13.2 USG per side USABLE 0.5 USG per side UNUSABLE;
Does NOT display on G1000;
SHUT OFF SWITCH breaks POWER to PUMP when at LOW FUEL preventing engine RUNNING DRY and MIXING AIR into fuel system

31
Q

What 2 propeties primarily describe the DA42 prop?

What are the propellers made of?

A 
CONSTANT SPEED, FULLY FEATHERING;
ROOT: HIGH COMPRESSED WOOD;
BODY: LIGHTWEIGHT WOOD;
EPOXY FIBREGLASS cover;
ACRYLIC LACQUER paint
32
Q

How are the props protected from erosion?

A

OUTBOARD: Bonded STAINLESS STEEL sheath;
INBOARD: Self ADHESIVE RUBBER strip

33
Q

How do the pitch of the props change?

What happens when oil pressure increases/decreases/lost?

A

CENTRIFUGAL MOMENTS cause blade to FINE;
COUNTERWEIGHTS cause blade to COARSE;
ENGINE DRIVEN GOVERNOR CONTROLS OIL PRESSURE;
INCREASE: Moves toward FINE PITCH
DECREASE: Moves toward COARSE PITCH
LOSS: COUNTERWEIGHTS and SPRING move blade to FEATHER

34
Q

How is the prop feathered?

Can it be unfeathered?

A 
PROP CONTROL moved PAST feathering GATE;
OIL LEAVES HUB;
COUNTERWEIGHTS and SPRING move blade to FEATHER;
CHECK VALVE on ACCUMULATOR CLOSES;
OIL is TRAPPED in ACCUMULATOR;
YES, through the use of accumulator:
PROP CONTROL moved FORWARD;
CHECK VALVE on ACCUMULATOR OPENS;
OIL moves from ACCUMULATOR to GOVERNOR
35
Q

What is the type of battery in the DA42?

What is it connected to?

A

24V 10Amp/Hr LEAD ACID BATTERY (Rear right front baggage);

HOT BATTERY BUS and BATTERY BUS

36
Q

What type of alternator does the DA42 have?
How many are there?
How is the control of the alternator different?

A

ENGINE BELT DRIVEN 28V DC 70Amp MAX;
2;
NOT next to BATTERY SWITCH, 2 SEPERATE switches on instrument panel

37
Q

What is purpose of voltage regulator?

A

CONTROL ALTERNATOR OUTPUT;
Manage LOAD SHARING;
Provide OVERVOLTAGE and GROUND FAULT PROTECTION;
Give CAUTION MESSAGES

38
Q

What does emergency switch power?

How long for?

A

AI and FLOOD LIGHT;

1.5 HOURS

39
Q

Where is the OAT probe located?

A

RIGHT SIDE of NOSE

40
Q

What type of stall warning does the DA42 have?
What safety feature does it have?
What happens to this feature when on the ground?

A

LIFT DETECTOR;
HEATING of DETECTOR VANE, MOUNTING PLATE, and complete HOUSING connected to PITOT HEAT SWITCH;
SQUAT SWITCH on RIGHT GEAR DERATES HEAT to 50%, CAUTION will appear if PITOT HEAT is on

41
Q

What should be used to clean the canopy?

A

DUPONT SONTARA WIPES and WATER;

PLEXUS

42
Q

How is the DA42 protected from fire?

A

FIRE EXTINGUISHER;
FIRE RESISTANT PAINT inside COWLING and under FUSELAGE;
STAINLESS STEEL engine FIREWALLS;
FIRE SLEEVING on engine HOSES

43
Q

What type of external lights does the DA42 have?

A

HIGH INTENSITY DISCHARGE;

ELECTRICAL CHARGE IGNITES XENON GAS

44
Q

What is the characteristics of the ELT and function of it in the DA42?

A

ARTEX 406 ELT controlled by remote control panel/indicator;
BELOW REAR BAGGAGE requires ANTENNA on UPPER FUSELAGE due to CFRP
REMOVABLE and BATTERY PACK lasts 72 HOURS on 121.5 and 243.0 and up to 24 HOURS on 406.025;
Transmits aircraft INFORMATION on 121.5 and 243.0 also every 50 seconds on 406.026 to satellites

45
Q

How do power values change when temperature is +/- 15 degrees from ISA

A

+ POWER DROPS approx 3%

- POWER INCREASES approx 3%

46
Q

What are the conditions of a takeoff distance performance chart?

A 
POWER: MAX at 2700RPM;
FLAPS: UP;
Vr: 78kts;
INITIAL CLIMB: 100kts;
RUNWAY: HARD, DRY, LEVEL`
47
Q

How do wind and slope affect takeoff distance?

A

4kts of HEADWIND DECREASE 3%
2kts of TAILWIND INCREASE 5%
2% SLOPE INCREASE 10%

48
Q

What are the conditions of a takeoff climb performance chart?

A

POWER: MAX at 2700RPM;
FLAPS: UP;
AIRSPEED: 90kts

49
Q

What are the conditions of a cruise climb performance chart?

A

POWER: MAX CONTINUOUS;
FLAPS: UP;
AIRSPEED: 90kts

50
Q

What are the conditions of a single-engine climb performance chart?

A 
POWER: MAX at 2700RPM;
DEAD ENGINE: FEATHERED and SECURED;
FLAPS: UP;
GEAR: RETRACTED;
AIRSPEED: 90kts
ZERO SIDESLIP
51
Q

What are the conditions of landing distance performance chart?

A 
POWER: As required;
GEAR: DOWN;
FLAPS: LANDING;
APPROACH: 85kts;
MAX EFFECTIVE BRAKES;
DRY, LEVEL, PAVED RUNWAY
52
Q

How does wind affect landing distance?

A

1kt of HEADWIND DECREASE 2%

1kts of TAILWIND INCREASE 4%

53
Q

What are the kinds of operation the DA42 can do?

A 
DAY VFR;
NIGHT VFR;
IFR;
NO flight into KNOWN or FORECAST ICING;
NO flight into THUNDERSTORMS;
MAX 18,000ft
54
Q

What are the approved manoeuvres in the DA42?

A

Certified in NORMAL CATEGORY:
ALL NORMAL flight manoeuvres;
STALLS EXCEPT POWER ON with FUEL IMBALANCE;
LAZY EIGHTS, CHANDELLES, STEEP TURNS up to 60 degrees;
NO AEROBATICS or SPINNING manoeuvres MORE than 60 degrees;
NO LARGE SUSTAINED SIDESLIPS

55
Q

What is Vs0 and Vs1?

A

Vs0: 57kt
Vs1: 64kt

56
Q

What is Vmca?

57
Q

What is Vr, Vy, and Vx with flaps up?

A

Vr: 78kt
Vy: 90kt
Vx: 78kt

58
Q

What is Vyse and Vsee?

A

Vyse: 90kt
Vsee: 80kt

59
Q

What is Vcruise climb (flap up) and Vfinal (flap landing)?

A

Vcruise climb: 90kt

Vfinal 85kt

60
Q

What is Va?

A

Up to 1542kg: 120kt

Above 1542kg: 126kt

61
Q

What is Vfe?

A

APP: 137kt
LDG: 111kt

62
Q

What is Vlo and Vle?

A

Vlo RETRACTION: 156kt
Vlo EXTENSION: 194kt
Vle: 194kt

63
Q

What is Vno and Vne?

A

Vno: 155kt
Vne: 194kt

64
Q

What is max demonstrated crosswind

65
Q

What is max ramp, zero fuel, take off and landing weight?

A

RAMP: 1795kg
ZERO FUEL: 1650kg
TAKEOFF: 1785kg
LANDING: 1700kg (can be 1785kg in emergency)

66
Q

What are the max baggage limits?

A

NOSE: 30kg
BEHIND SEATS: 45kg
EXTENSION: 18kg
BEHIND SEATS and EXTENSION combined: 45kg

67
Q

How is the nose wheel steered?
What is the limit of the steering?
How does the wheel remain centred?

A

RUDDER CONTROL via a STEERING LINKAGE;
30 degrees DEFLECTION with steering STOPS;
CENTERING UNIT which acts when on GROUND/PRESSURE on WHEEL from BENEATH

68
Q

How does the gear stay retracted?

A

System is ALWAYS PRESSURISED and CONTROLLED by VAlvES, the pressure on the ACTUATORS keep gear locked in place

69
Q

What are the valves in the system?

What do they do?

DA42 Ground Course (3 decks)

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