Numbers to Memorize Flashcards
B4 Engine
Turbomeca Arriel 2B1
T2 Engine
Turbomecca Arriel 2D
Horsepower Ratings: MCP/MTOP
B4/T2
B4: 728 MCP / 747 MTOP
T2: 856 MCP / 952 MTOP
FLI Limits
B4/T2
B4: 0 - 9.6 Cont, 9.6 - 10 Takeoff, 10 - 10.4 Trans 5sec
T2: 0 - 8.2 Cont, 8.2 - 10 Takeoff, 10 - 10.4 Trans 5sec
T4/TOT Start Limits
B4/T2
B4: Above 750C for 10 sec, Limit 865C
T2: Above 750 for 10 sec, Limit 840C
AMC does not want you to use the 10 sec ranges
T4/TOT Flight Limits
B4/T2
B4: - 849 Cont, 849 - 915 Takeoff, 915 - 941 Trans 20sec
T2: - 905 Cont, 905 - 949 Takeoff, 949 - 981 Trans 20sec
Rotor RPM Ranges
B4/T2
B4/T2: 320-375 caution, 375-405 green, 405-430 yellow
Torque Start Limits
B4/T2
B4: 30%
T2: N/A
Torque Flight Limits
B4/T2
B4: 0 - 92.7 Cont, 92.7 - 100 Takeoff, 100 - 104 Trans 5sec
T2: 0 - 81.3 Cont, 81.3 - 100 Takeoff, 100 - 104 Trans 5sec
Del Ng / Del N1 Start Limits
B4/T2
B4(Del Ng) and T2(Del N1)
67% Idle
Nf Start Limits (Free Power Turbine)
B4/T2
B4: 349 Min
T2: 367 Min
Nf Flight Limits (Free Power Turbine)
B4/T2
B4: 349 - 418 Cont, 418 MAX, 418 - 450 Trans 5sec
T2: 367 - 413 Cont, 413 MAX, 413 - 440 Trans 20sec
T2 Takeoff Power Limitations
40 kts for 30min
60min cumulative MAX
Horn Activation RPMs
B4/T2
Continuous Horn < 360 RPM OR 1.5+ sec in transient range
Intermittent Horn > 410 RPM
Minimum Engine Oil Press
B4/T2
B4/T2: 1.1 bar, light comes on if less than
Engine Oil Press Ranges
B4/T2
B4/T2:
1.1 > 70 Ng/N1
1.1 - 2 Caution
2 - 6 Normal
6 - 9.8 Caution
9.8 MAX
Engine Oil Temp Ranges
B4/T2
B4/T2: -10 - 0 Caution
B4: 115C MAX, light comes on if above
T2: 117C MAX, light comes on if above
Height
11.84 ft
Skids to top of vertical fin
MR Diameter
35.07 ft
Full Length
(Rotor tip forward to vertical fin tip)
41.47 ft
Tip of blade to end of vertical fin
MR Type
“Starflex”
Number of MR blades
3
TR Type
Fenestron
TR Diameter
3.28 ft
Number of TR blades
10
Nominal TR RPM
3,568 RPM
Nominal MR RPM
386 RPM
Fuel capacity
B4/T2
B4/T2
142.7 US gal
940 LBS
Number of fuel tanks
1
Type of Fuel Tank
B4/T2
B4: Crash Resistant Fuel Tank
T2: Crash Worthy Fuel Tank
Usable fuel
Both
142.1 US gal
MGB Oil Capacity
Including Filter
1.7 US gal
Engine Oil Capacity
1.64 US gal
TRG Oil Capacity
.08 US gal
Servo Control Fluid Capacity
per Reservoir
.26 US gal Minimum
.32 US gal Maximum
Stinger Height Above the Ground
1.93 ft
MR Rigging
2 degrees forward
Max Rotor Brake RPM
170 RPM
Req time between Rotor Brake application
5 min
between 2 brake applications
Slope limits
Both:
6 deg nose up
6 deg nose down
8 deg sidways
Weight of each MR Blade
~ 74.7 lbs
Number of tabs per MR blade
6
How many cabin resonators are there?
2
How any bearings support the TR drive shaft?
5
How many TR drive shaft bearings are rigid, self-aligning bearings?
No. 1 bearing only
Rearward most bearing
Provides specific rigidity to ensure optimum axial vibration
How many TR drive shaft bearings support the shaft, absorb vibrations, and are greasable bearings?
No. 1-5 bearings
Forward most 4 bearings
Min Volts for Start
Both:
22.0V
FUEL light
Both:
9%
15.8 gal
15 min at MCP
Fuel Consumption
Both:
48 GPH
313 lbs/HR
Vne Doors Off
Both:
70 kts
Vy
Both:
70 kts (-1kt / 1000ft)
Auto Speed
Both:
70 kts (-1kt / 1000ft)
Engine Oil Temp High Speed
Both:
80 kts
Vne Power On
Both:
155kts (-3kt / 1000ft)
Vne Power Off
Both:
125kts (-3kt / 1000ft)
Volts Ranges
B4/T2
Both:
26.0 - 29.0 Normal
31.5V Max
Min/Max temp for Operation
Both:
-40C
IAS+35C, Max of 50C
Max Operating Altitude
B4/T2
B4: 17,000ft (Supplements)
T2: 23,000ft
Max Takeoff Weight
B4/T2
B4: 5350 lbs
T2: 5512 lbs
RH cargo max weight
287 lbs
LH cargo max weight
342 lbs
Rear cargo max weight
176 lbs
Start/Gen Amps
Both:
200A (Supp 29)
Starter (Crank) Limits
Both:
30on/60off
30on/60off
30on/30 Min off
Fuel Press Light (Bars)
B4/T2
Both:
< .5 bars, caution light comes on
Fuel Filter Differential for Light and Bypass (Bars)
B4/T2
Both:
> 0.7 bars diff, caution light comes on
> 1.2 bars diff, filter bypass
B4 Hover Turns Limits
360 deg for 6 seconds
Dual VEMD Screen Failure Speed
Both:
100kts (-2kt / 1000ft)
No hover landing
HYD + SERVO Limits
Both:
< 30 deg bank
< 110 kts Vne