Mass & Balance Flashcards
1
Q
CG forward of CP
A
Increased trim -> fuel Pitch down tendency (flaps especially) Elevator loads higher Stability Nose gear stress Climb / climb gradient reduced Increased stalling speed
2
Q
CG aft of CP
A
Decreased trim Pitch up tendency Elevator control force reduced (possible overstressing) Instability -> Increased pilot workload Spin recovery harder Reduced stalling speed Poor landing characteristics
3
Q
Load Shift Ratio Method
A
md = MD m: shifted mass M: aircraft mass d: shifted mass arm change D: Aircraft CG arm change
4
Q
Aircraft Reweighing
A
Cumulative:
DOM change +- .5 % of MLM
CG shift +- .5% of MAC
AC must be reweighed or recalculated CG
5
Q
PAX Age
A
Infants 0 - 1.9
Children 2 - 11.9
Adults 12+
If infant has own seat = child
If infant on parent lap = no mass
6
Q
PAX & Luggage Mass Weigh Rules (4) Baggage Modification (2)
A
1 . Weigh PAX
- Standard mass
- Ask weigh < 10 Pax
- If many heavy PAX, weigh or add increment
6 kg deducted when no handbaggage
Must weigh checked-in baggage when PAX < 20
7
Q
Crew Mass
A
Flight Crew + bags - 85 kg
Cabin Crew + bags - 75 kg