Limitations Flashcards
(150 cards)
1
Q
Max Gross Weight Internal Load
A
3200 lbs @ 75 psf
2
Q
Max Gross Weight External Load
A
3350 lbs
3
Q
Max Gross Weight – Fixed Floats
A
3000 lbs
4
Q
Max Gross External Load – Fixed Floats
A
3350 lbs
5
Q
Max Cargo Hook Load
A
1500 lbs
6
Q
Max Fixed Cargo Hook Load
A
1200 lbs
7
Q
Minimum Cockpit Weight
A
170 lbs
8
Q
Maximum Cockpit Weight
A
550 lbs
9
Q
Maximum Baggage Compartment Weight
A
250 lbs @ 86 psf
10
Q
Min Approved Empty Wt (C of G Calc required)
A
1500 lbs
11
Q
Minimum Cockpit Weight with Range Extender
A
200 lbs
12
Q
Maximum Cockpit Weight with Range Extender
A
400 lbs
13
Q
Maximum Aft Passenger Weight with Range Extender
A
510 lbs
14
Q
Max Bag Compartment Wt With 3 Rear Pax and Range Extender
A
110 lbs
15
Q
Max Alt GW < 3000 Lbs
A
20,000’ PA
16
Q
Max Alt GW > 3000 Lbs
A
13,500’ DA
17
Q
Max Alt Fixed Floats
A
15,000’ PA
18
Q
Pressure Altitude
A
Alt shown with alt set to 29.92
19
Q
Density Altitude (Pa corrected for Temp)
A
Pa + (100x(actual T° - standard T°))
20
Q
ICAO Standard Day
A
15°C at SL (-2°/1000’)
21
Q
Vne Power On < 3000 lbs
A
150 mph < 3000 lbs (-4 mph /1000’ > 3000’)
22
Q
Vne Power On > 3000 lbs
A
140 mph > 3000 lbs (-8 mph/1000’ > 3000’)
23
Q
VNE Auto
A
115 mph a/s >=high rate of descent/low Nr
24
Q
VNE Aft doors off
A
100 mph (-1 mph/1000’ > 3000’)
25
VNE Front doors off
80 mph (-1 mph/1000’ > 3000’)
26
VNE Takeoff torque 85%-100%
92 mph (upper mast bearing wear/mast bending)
27
VNE – Fixed Floats
120 mph (-5 mph/1000’ > 3000’)
28
VNE – Fixed Floats – Autorotation
100 mph
29
VNE – Fixed Floats – left FWD door removed
90 mph
30
VNE - Cargo Hook & Gross Weight > 3000 lbs
91 mph
31
Best Rate of Climb
60 mph
32
Min Rate of Descent
60 mph
33
Maximum Glide Configuration
80 mph / 90% Rotor RPM
34
Max Sideways/X-wind
20 mph
35
Max Rearwards
20 mph
36
Take Off Power Limits Tq, TOT, N1
Tq 100% TOT 810°C N1 105% for 5 minutes
37
N2 – Power Turbine Power On
97 – 100%
38
N2 – Power Turbine Transient
105% for 15 sec
39
N2 – Power Turbine Avoid continuous ops between
75-88% N2 above 30% Tq Max 60 sec
40
N2 – Power Turbine Flight Idle Autorotation
98% N2
41
N2 – Power Turbine drives
N2 tach gen, gearbox, accessories
42
Nr - Rotor Power On
97 – 100%
43
Nr - Rotor Power Off (autorotation)
90 – 107% (high Nr=max rotor energy for landing but will increase rate of descent)
44
Nr - Rotor Autorotation touchdown min
Prior to 70% Nr
45
Nr - Rotor Transient RPM Droop
95% for max 5 sec
46
Nr - Rotor Acceleration Range (aqap with cyclic neutral)
50-60% Nr to avoid t/r resonance
47
Rotor Brake Actuation Speed
38%-30% Nr
48
Rotor brake limit prevents
Excessive brake wear/overheating
Stress on gear boxes
Uncontrolled rotation on slippery surfaces
49
Main Blade Tip Tie-down load
Max 100 lbs
50
Main Blade Tip Tie-down deflection
Max 24”
51
Main rotor
Semi-rigid system (flaps & feathers)
52
Main rotor mast tilt longitudinal
Fwd 5° for level fuselage when disc tilted fwd
53
Main rotor mast tilt lateral
Left 1.5° to allow for t/r drift
54
Main rotor diameter
33’ 4”
55
Main rotor rpm at 100% N2
394 rpm
56
N1 - Gas Producer Max
105%
57
N1 - Gas Producer Transient
106% for 15 seconds
58
N1 - Gas Producer Drives
Eng fuel pump, N1 tach gen, oil pumps, starter/gen, Air/oil separator, gear train in the accessory gate
59
Tq - Torque Take Off
100% for 5 minutes
60
Tq - Torque Transient
110% for 5 seconds
61
Tq - Torque Max Continuous
85%
62
TOT Continuous
100-738°C
63
TOT Take Off
738-810°C for 5 minutes
64
TOT Power Transient
810-843°C for 6 seconds
65
TOT Start
810-927°C for 10 sec/927 for 1 sec
66
TOT Residual TOT max prior to start
<150°C
67
TOT Exceeding 810°C or Tq 100% may cause
N1 topping and rotor droop
68
Engine Anti-Ice/Pitot Heat
OAT > 4.4°C
69
Engine Anti-Ice/Pitot Heat
Visible Moisture AND OAT < 4.4°C
70
Engine Anti-Ice Test
Rise of 10-20°C
71
Engine Anti-Ice
inlet guide vanes/front bearing support hub
72
Tail Rotor Feather bearing free play
¼” at Blade tip
73
Tail Rotor Pitch Change Link Radial & Axial Free play
10/1000”
74
Tail Rotor Clearance between blade tip and tail boom skin
1"
75
Tail Rotor Design
Delta hinge
76
Snow Baffles (Engine Air Induction System Deflector Kit) Additional Mandatory Equipment
```
Particle Separator
Engine Relight (not above 12,000`)
```
77
Snow Baffles (Engine Air Induction System Deflector Kit) Hover/Flight/Ground Ops in blowing/falling snow
20 minutes with vis > ½ mile
78
Snow Baffles (Engine Air Induction System Deflector Kit) Ground Idle Operation
5 minutes (shutdown and inspection required)
79
Snow Baffles (Engine Air Induction System Deflector Kit) Snow Baffle Removal
26.7°c
80
Starter Limitation - battery start
40s/60s ; 40s/60s ; 40s/30 min
81
Starter Limitation - external Power
25s/30s ; 25s/30s ; 25s/30 min
82
Load Meter Maximum
70%
83
External Power Supply required
28v 400a
84
Generator Output
30v 100/150a derated to 105a
85
Generator driven from
engine reduction gearbox Compressor access drive
86
Battery – max temp
60°C
87
Battery
24v 13 amp-hour or 17 amp-hour
88
Cargo Hook Max GW
3350 lbs
89
Cargo Hook Max capacity
1200/1500 lbs
90
Cargo Hook Vne > 3000 lbs
91 mph
91
Cargo Hook Cautions
Check slung load clearance and obstacles
Avoid flight over people/vehicles/structures
High hover till cargo touches ground then maintain tension and press cargo release
92
Power Plant Allison Turbine or Rolls Royce
Model 250-C20B or 250-C20J
93
Power Plant Shaft Horsepower
420 d/r to 317 (t/o) 270 (max cont)
94
Power Plant 2 stage compressor
Axial & centrifugal ratio 6:1
95
Power Plant Compressor on start
Driven by generator
96
Power Plant Compressor after start
Driven by N1 gas producer
97
Power Plant N2 drives
Gearbox and accessories
98
C OF G Forward - Aft
106.0 forward – 114.2 aft
99
C OF G Left - Right
3.0 left 4.0 right
100
C OF G Fore/Aft with one or both front doors off or front/rear combo off
106.0 forward – 110.0 aft
101
C OF G vs Fuel burn
Moves forward with fuel burn
102
C OF G Datum (Station 0)
| screws on pitot tube mount
55.16" fwd of fwd jackpoint centerline
103
C OF G Calculation
| must be calc with fwd doors removed
Wt x arm = moment
| total moment ÷ total wt = total arm
104
C OF G Rate of climb reduction with any door off
-350 fpm
105
OAT Temp limits min
-40°C
106
OAT Temp limits max
+52°C at SL - 2°/1000’
107
Altitude Limits
SL – 20,000 PA
108
Certified Noise Level
82.6 dBA
109
Width
6.28 ft
110
Length
39.21 ft
111
Height
11.63 ft
112
Engine Oil Capacity
5.5 qt MIL-PRF23699 >-40°C /MIL-PRF7808
113
Transmission/Freewheel Oil Capacity
5 qt
114
Tail Rotor Gear Box Oil Capacity
0.38 Pint
115
Log Book Entry Required each time
eng/trans/trgb oil added Brand/type/quantity
116
Engine Oil pressure range
50-130 psi
117
Engine Oil Pressure Minimums
< 78.5 N1
78.5 - 94.2 N1
> 94.2 N1
50 psi
90 psi
115 psi
118
Engine Oil temp range
0-107°C
119
Freewheel oil supply
Main gear box
120
Hydraulic Capacity
1 Pint
121
Hydraulic Fluid pressure range
600 +/- 25 psi
122
Hydraulic pump driven from
Main rotor gear box
123
Fuel Capacity Standard Tank
77.06 US Gallons
124
Unusable Fuel Standard Tank
| Boost Pumps On
1.06 US Gallons
125
Fuel Capacity Large Tank
92.06 US Gallons
126
Unusable Fuel Large Tank
| Boost Pumps On
1.03 US Gallons
127
Fuel Capacity Range Extender
96.70 US Gallons
| check gauge each 15 min
128
Unusable Fuel with Range Extender
| Boost Pumps On
1.06 US Gallons
129
Unusable Fuel – 1 or 2 Boost Pumps Off
10 US Gallons
130
Average Fuel Consumption
30 Us Gallons / Hour
131
Jet A (Limited to: OAT > -18°C)
6.8 lbs / US Gallon Jet A, Jet A1, JP5, JP8
132
Jet B (May be used at all temperatures)
6.4 lbs / US Gallon Jet B, JP4
133
Min Fuel press cold wx ops -18°C to -32°C
8 psi (Jet A, Jet A1, JP5, JP8) red triangle
134
Heli with airframe fuel filter
Anti-icing additive not required at any temp
135
Fuel Pump pressure range
4-30 psi
136
Trans Oil pressure range continuous
30-50 psi
137
Trans Oil pressure range max
70 psi
138
Trans Oil temp range
15-110°C
139
Transmission reduction ratio
6016 eng output rpm to 394 rotor rpm
140
Pop Out Floats VNE Inflated Airspeed
80 mph
141
Pop Out Floats VNE Autorotation Airspeed
70 mph
142
Pop Out Floats VNE Inflation Airspeed
60 mph
143
Pop Out Floats Max Inflation Altitude
<2000 ft agl
144
Pop Out Floats Max Rate of Climb
1000 fpm
145
Bleed Air Valve Location
5th stage compressor
146
Bleed Air Valve During start, acceleration, low comp ratio ops
Open to unload compressor & prevent blade stall & surge
147
Bleed Air Valve Closes at
Closes at 87% N1
148
Bleed Air Heat Prohibited (8)
Eng fail, insufficient pwr, fcu/gov fail, eng overtemp, OAT>5°C, t/o, ldg, >85% Tq
149
Bleed Air vs TOT
TOT will rise 20-50°C
150
Carbon Monoxide Detector
Monitor
| ventilate as required
