Systems Flashcards
(81 cards)
1
Q
Vne
A
194 Kts
2
Q
Vno
A
154 kts
3
Q
Va
A
132 kts @ 3900 lbs
116 kts @ 3000 lbs
4
Q
Vfe
A
120 kts up to 20 degrees
110 kts for full flaps
5
Q
Vle
A
140 kts
6
Q
Vlo
A
112 kts
7
Q
Vmc
A
65 kts
8
Q
Vso
A
60 kts
9
Q
Vsi
A
70 kts
10
Q
Blue radial
A
85 kts
11
Q
Vyse
A
85 kts
12
Q
Vxse
A
85 kts
13
Q
Vrotation
A
71 kts
14
Q
Vsse
A
71 kts
15
Q
Max Zero Fuel weight
A
3500 lbs
16
Q
Max Ramp weight
A
3916 lbs
17
Q
Max takeoff weight
A
3900 lbs
18
Q
Max landing weight
A
3900 lbs
19
Q
Max Baggage in Baggage Compartment
A
200 lbs
20
Q
Max load factors, flaps up
A
-1.52G to 3.8G
21
Q
Max load factor flaps down
A
2 G
22
Q
Total fuel
A
103 g
23
Q
Total usable fuel
A
100 g
24
Q
Fuel grades usable
A
100 or 100LL
25
Fuel flow
9g @ 23 / 2300 rpm
11g @ 25 / 2500 rpm
26
Max slip duration
30 seconds
27
Max starter duty time
30 Seconds on, 2 mins off
28
Service Ceiling - ISA, both engines
19 600 ft @ 3900 lbs
29
Service Ceiling ISA single engine
6200 @ 3900 lbs
10 300 @ 3400 lbs
30
Oil capacity
8 qts max
31
Engine type
Lycoming O-360 and LO-360
32
engine horsepower
180 hp @ 2700 rpm
33
Propeller
Full feathering
Constant speed
Adjustable pitch
76 inch
2 blade Hartzell
counter rotating
34
Brake system
Hydraulic disc brakes on main wheels
Hydraulic fluid MIL-H-5606 (red)
Toe pedal operated
35
Brake fluid reservoir location
left side of forward cabin bulkhead
36
Landing gear description
Tricycle
Retractable
Electrically driven hydraulically actuated
37
Landing gear safety switch
located in pitot sytem
speeds less than 59-63 kts open landing gear circuit to prevent inadvertent gear retraction
38
Landing gear CB
2 - one for the motor and one for the control
39
Gear retraction process
Electric motor rotates pump CW
Forces hydraulic fluid through manifold to the retract side of the system
Pressure switch automatically shuts off motor when system reaches 1550 psi +/- 100
If pressure drops to 1250 or less the pressure turns the motor back on until it reaches 1550 psi
Uplock check valve in the pump retains pressure to hold gear up
40
Gear Extend process
Electric motor rotates CCW
Forces hydraulic fluid through manifold to extend side of the system
Main gear downlock accomplished by overcenter travel of spring held side brace
Nose gear downlock accomplished by overcenter travel of drag link and mechanically actuated downlock
41
Emergency landing gear process
Pop Gear Motor CB
Put gear handle in down position
Slow down below 100 kts
release hydraulic pressure in bypass valve by turning it 90 degress CCW
42
Throttle warning system
If MP less than 12 (POH says 16-18), gear horn will sound
43
Landing gear warning horn
If MP < 12"
Flaps > 16 degrees
Use same landing gear warning horn
44
Landing gear time delay relay
30 seconds
Incorporated into the electric circuitry of gear system to prevent continuous operation
De-energizes gear up relay only
Reset by putting gear handle down then up
45
Tire pressures
38 psi (all)
46
Landing gear shock struts
Oleo on nose
Shock absorbers on mains
47
Stall warning vanes
2
Left wing 0 - 16 degree flaps
Right wing 17-35 degree flaps
48
Flaps
Single slotted fowler flaps
0-35 degrees
Electrically operated / actuated
Single flap motor located underneath rear pax compartment
Flaps connected via hollow interconnect torque tube through fuselage
49
Fuel quantity indicators
Each tank has 2 float type fuel quantity sensors to transmit fuel quantity to fuel gauges in cockpit
50
Min fuel required for takeoff
18 g (9g / tank)
51
Which cylinders are primed w/ primer
1, 2, 4
52
What cylinder has manifold pressure gauge
3
53
What cylinder has CHT gauge
3
54
Carburetor type
float type
55
Primer solenoid
Electrically operated
Actuated by push to prime
Battery a fuel pump must be on
56
Fuel tank vents
caps
fuel vents under wing
57
How many fuel pumps
4
2 engine driven
2 electric driven
58
Aux fuel pumps use
Start, taxi, takeoff, landing, emergency ops
59
When can fuel cross feed be used
level flight only in emergency situations
either engine can consume fuel from the opposite tank
60
Fuel drains
8, 4 per wing
61
Battery
1 x 24V 15.5 amp battery
62
When is battery used
Start, to power bus bar before alternators online
Emergency in event alternator failure
63
Alternators
2 x 28V 55 amp alternator AC current rectified to DC current in electrical system
64
Self excitation
Normally, alternator field is stimulated by current drawn from battery HOWEVER
Alternators in BE-76 have self excitation, meaning the provide current to the electrical system without external power (battery) to stimulate the alternator field
Comes on at 1200-1400 rpm, battery is then no longer needed
Important if complete electric failure and need to isolate battery, alternators will cont to function as usual and power their respective busses
Load carrying ability will be lower though - up to 80% at 2300 rpm, 50% @ 12-1400 rpm
65
Loadmeters
2
Marked in percentage to show portion of max current available (55 amps) being drawn from each alternator
66
Loadsharing
- Bus tie fuse
- Battery bus bar
- Paralleling circuit between voltage regulators
bus tie and battery bus bar allow a single operating alternator to support the load of both alternator bus bars
67
Most direct tie between left and right alternator bus bars
Bus tie fuse
30 amp
establishes limitation on the amount of electrical load we can carry on the alternator out bus bars (less than 30 amp)
Minimal electrical load should be imposed so that bus tie fuse doesn't blow
68
Battery bus bar
Also ties together left and right alternator bus bars though independent bus isolation CB (50 amp)
In the event of a bus tie failure, battery bus bar is now our last tie between left and right alternator bus bars
Must ensure load is less than 50 amp
69
Undervoltage
Alternator output drops 4 +/- 0.1 below bus voltage
Undervoltage light will come on
Loadmeter will be zero
Affected alternator become an additional load for working alternator until the failed alternator field switch is turned off
70
Overvoltage
Alternator output exceeds bus voltage by 4 +/- 0.1
Overvoltage relay will open the circuit to affected alternator
Voltage will drop to zero
Alternator is effectively switched off
71
Lock pins
prevent engine from feathering during ground ops below 1000 rpm
72
Propeller pitch settings
Feathered = 81 degrees
Low 12.1
High 17
73
Feathering
Release gov oil pressure to drain oil back into engine as well as accumulator
Springs, nitrogen and counterweights help bring propeller to feather
3-10 seconds
74
Unfeathering
Repositioning the governor to normal flight range
Closes lock valve to oil sump and opens lock valve from the accumulator, releasing trapped oil pressure from accumulator to bring prop to lower pitch higher rpm setting
75
Underspeed condition
Level flight to a climb
Engine rpm drops, fly weights drop in, opening pilot valve, letting oil into the system pushing piston forwards resulting in engine increasing rpm to original rpm setting
76
Overspeed condition
Level flight to a dive
Engine rpm increases, fly weights out, lifting pilot valve allowing oil out, piston assisted by feathering spring, nitrogen and counterweights pushes blades to higher pitch, lower rpm
77
Speeder spring
set by pilot for rpm desired - increases / decreases tension on fly weights
78
Accumulator
Air side charged with nitrogen
Oil side is charged by prop governor and stores oil at governor pressure of 290 psi
When prop unfeathered, oil is released from the accumulator to the prop hub to move blades to low pitch
Windmilling engine causes governor oil pressure to rise again, completing unfeathering
79
Heater
45 000 btu janitrol combustion heater
Located in right nose compartment
Use 2/3 g of fuel / hour from right tank / hour
80
Heater temp limit
300 F
Overtemp Switch shuts off the heater when this temp is exceeded
Not resettable in flight
Cabin air should be open only 1/2 way with heater on or else heater will be deactivated to prevent overtemp
81
Cabin air blower
Shuts off when gear is retracted due to connection with nose gear down limit switch
Should be off in flight
Heater should be put to blower only after landing to cool heater before shutting it down
