B4 Limitations Flashcards
Types of Ops Approved
Day VFR
Forbidden Operations
- Aerobatics
- Engine starting in snow or ice around intake
- Flight in falling snow without sand filter
- Flight in freezing rain or icing (or conducive for)
- In flight use of twist grip except for engine failure training, emergency procedures, or mx checks
- In flight intentional turn off of VEMD
Red Line meaning
Safety limit or takeoff limit
Red/white hatching meaning
Vne, power off
Yellow range meaning
Caution range or takeoff rating range
Green range meaning
normal operations range
White triangle meaning
equip operating limit
Red triangle meaning
transient limit
Min Weight
Max Weight
3307 lbs
5350 lbs
Vne power off
125 kts - 3kts/1000ft
Vne power on
155 kts - 3kts/1000ft
Vne with doors open or removed
Depends on the configuration - reference RFM
Lowest Value - 70 kts
Max operating altitude
We have Post MOD 07-3587:
20,000 Hp
Min/Max operation temp
-40C
IAS +35C limited to +50C
Slope landing limits
Nose up - 6 deg
Nose down - 6 deg
Sideways - 8 deg
Manuevering Limits
Do not exceed the load factor causing (LIMIT) yellow caution light to come on
Rotor brake limits
- prohibited to start with rotor brake engaged
- 5min time required between 2 consecutive applications
- 170 RPM max application speed
MR Limits
170 RPM : Max rotor brake speed
320 RPM : min power off
320 - 375 RPM : Caution Range
375 - 405 RPM : Norm op range
405 - 430 RPM : Caution range
430 RPM : max power off
Horn speeds
Low Nr </= 360 RPM
High Nr >/= 410 RPM
FLI
9.6 mcp
9.6 - 10 takeoff power
10 max takeoff
10.4 max transient (5 sec)
TQ Limits
92.7 % mcp
92.7 - 100 % from 0-40kts
100 % max takeoff
104 % max transient (5sec)
Nf (free turbine speed) Limits
349 RPM min
349 - 418 RPM normal
418 RPM mcp
450 RPM max transient (5 sec)
Ng Limits
Ng = 67 % min stabilized speed
-4% mcp
-4 to 0% takeoff power
0% max takeoff rating
+1% max transient (5 sec)
t4 Limits - Starting
750C max continuous
865C max transient (10 sec)
t4 Limits - Flight
849C max continuous
849 - 915C takeoff power
915C max takeoff
941C max transient (20 sec)
Oil Temp Limits
-10C to 0C Caution range
115C max temp
min oil temp before power is 0C
Oil Press Limits
1.1bar min pressure
1.1 - 2bar caution range
6 - 9.8bar caution range
9.8bar max pressure
Electrical circuit limits
Max V - 31.5V (rated 26-29V)
Max Current - 200A starter gen
RH/LH cargo limit
62.5 lb/ft^2 = max distrib. load
RH - 287lb
LH - 342lb
Rear cargo limit
30 lb/ft^2 = max distrib. load
Rear cargo - 176 lb
Purpose of the limits set on N1/T4/Torque
N1 and T4 limits are to protect the engine
Torque limits are to protect the MGB
