Weight & Balance, Determining Performance, And Engine Systems & Operations Flashcards
Weight x Arm =
Moment
Moment / Weight =
CG
In large aircraft, CG is expressed in
MAC% (Mean aerodynamic chord)
CG range is usually between
15% - 37% MAC
CG aft of limits causes
Unstable pitch conditions regardless or airspeed
Weight shift formula
Weight of cargo moved Distance CG Moved
——————————— = ———————————
Aircraft weight Distance between arms
When determining performance for a short field takeoff over a 50’ obstacle, what speed is most important?
Vx
Performance is decreased by how much with cargo door removed?
5%
When you lose an engine, you lose how much power and climb performance?
50% of power and 70-80% climb performance
What are the two types of rotating props and which do we have?
Conventional and counter rotating. We have counter rotating
SE & ME absolute ceiling is always
0 FPM (Feet per minute)
Service ceiling
100 FPM (Feet per minute)
SE Service Ceiling
50 FPM (Feet per minute)
*one engine is inop
What is a critical engine?
An engine, when out, affects controllability and performance most adversely
Climb performance is based on
Excess thrust
