perf docs Flashcards
vortex generator
high bypass ratio engine has a chine (vortex generator) to help airflow to flow smoothly over the wing
Ch 1 AOM limitations from 3 areas
1) Airplane Flight Manual (comply with airworthiness cert)
2) established by company for safety of operation
3) established by company in accordance with manufacturer recommendations
working limit envelope
allows for CoG movement in flight
fuel burn
flap movement and configuration changes
loading in shaded area
requires control of cargo lateral imbalance (may cause excessive load to main gear)
constant tail load
the strength of the tail and aft body structure can impose a limitation on the forward CoG limits
what limits Mmo
high speed limit by shock wave
what limits Vmo
high speed limit by air load
required takeoff field length
the longest of:
a) 115% takeoff dist AEO
b) takeoff dist OEI
c) ASD with OEI
B767 AFM takeoff perf only 1 type rwy
DRY
std for wet runway
v1 reduction
screen ht 15’
wt reduction for a few cases
std for slippery runway
more v1 reduction
v1 is limited by vmcg
wt reduction maybe required
perf of engine reduces greater than what temp
32 degs
obstacle limit
net flt path to have 35’ over obst
net flt path is lower than actual flt path by 0.8%
on FPDM * indicates obst limit wt, not field limit wt
engine failure reference proc
provided for those airports where obstacles in the climbing course affect the safe clearance especially in IMC.
PIC takes all conditions into account, and takes the best way to clear the obstacles.
It may also be a good choice to enter the traffic pattern or avoid those obstacles visually in VMC condition
enroute limit
need to determine single engine ceiling and drift down
must clear obstacle by 2000’ for D/D
landing limit
max allowable landing limit wt PLUS burn off fuel
zero fuel limit
max zero fuel weight PLUS on board fuel
tire speed limit and brake energy limit
only check brake energy limit as more restrictive
landing dist
for dry rwy
AFM = ANA
ACTUAL DIST/0.6
for slippery rwy
AFM (WET) = AFM (DRY) X 115%
ANA = CRITICAL OPERATION
CRITICAL OPERATION
ANA AFM wet
threshold spd Vref + 15 Vref
touchdown pt 2000’ 950’
transition time 3 sec 0.3sec
braking force idle (max v slip) dry max force
reverse thrust as above not used
coefficient of length margin 1.0 complex
landing wt climb limit
no need to check unless under MEL or CDL
Cat I RVR <1200m, Cat II/III runway length
115% of DRY runway for weight. If landing wt less than WET (G) FPDM then this reqmt is met
does MAX THR always allow max wt?
shortens takeoff dist
improves climb gradient
lengthens the ASD at the wt that v1 is limited by vmcg
sel of THR for line ops
the lower the thrust the longer the engine life can be
reduced takeoff thrust is avail
