LIMITS- system Flashcards
NP Avoid range - except when
20-40%
60-90%
except during start up and shut down
when might you see a NP1 and 2 speed split
during auto rotational descent when main rotor is fully decoupled from engines
from 100% to 107% max can be expected
during power recovery it is normal for one engine to operate above 100% to lead the other
rotor start/stop limits – in relation to wind
45 kts any direction
rotor speed limit
power off - 120% NR authorized for maintenance test pilots during auto rotational RPM checks
operations against the gust lock is ___________
prohibited
rotor brake shall not be applied with ended operating and rotor turning except during ___________
an emergency stop
maximum rotor speed for emergency rotor brake applications is
76% NR
routine stopes will be with engines _____, NR below ____ and with _____________ PSI applied to stop the rotor in not less than ____ seconds
off
40%
150-180
12
min / max rotor brake pressure for engine start
450-690
use of the rotor brake with engines operating is restricted to ________ and _______ engine starts and operations at ________ only
single
dual
IDLE
xmsn oil fluctuation is normal under what conditions?
during transient maneuvers (hovering in gusty wind conditions)
flying pitch attitude of above +6 degrees
acceptable even when dropping below 30 psi (yellow range) — this is why you should make sure during normal forward flight, PSI is between 45 to 60 to accommodate for this drop
NP Limits
trans 91-95%
cont 95-101%
trans 101-105%
12 sec trans 105-107%
NR power on
trans 91-95%
cont 95-101%
trans 101-107%
NR power off (autorotation)
normal 90-105%
trans 105-110%
max 110%
NG (gas generator speed)
continuous 0-105%
12 second transient 105-106%
Q (torque)
continuous – 10 second transient
above 80: 0-100 – 144
below 80: 0-120 – 144
single eng: 0-135 – 144
TGT
normal 0-793 30 min 793-846 10 min 846-879 2.5 min 879-903 12 sec 903-949
Engine oil temp
continuous -20-135
30 minute limit 135-150
engine oil pressure
idle 22-26
normal 26-100
5 minute 100-120
xmsn oil temp
continuous -20-105
precautionary 105-140
xmsn oil pressure
idle and transient 20-30
continuous 30-65
precautionary 65-130
fuel low at ____ lbs
200
pneumatic starter limits/ cycle
start cycle= initiation and acceleration of compressor from 0 RPM to starter dropout
