Ch 2: Straight and Level Flashcards
Ch 1 Rev: RAF acts …… to aeroplane’s flight path (Pg 9)
Parallel and opposite
Ch 1 Rev: Curvature of aerofoil is called … (Pg 9)
Camber
Ch 1 Rev: Difference between Chord line and RAF is… (Pg 9)
Angle of Attack (AoA)
Ch 1 Rev: Centre of Gravity is point at which … acts through (Pg 9)
Gravity
Chord Line (Pg 21)
Direct line from leading edge to trailing edge of wing
Mean Camber (Pg 21)
Line running from leading to trailing edge equally between upper and lower surfaces
Centre of Pressure (CoP)
Point where lift is considered to act through
Aeroplane is straight and level when… (Pg 21)
Maintains constant heading (direction), Constant Altitude, at Constant Airspeed whilst in balance
/ State of Equilibrium
4 Forces acting in aeroplane in flight… (Pg 21)
Lift, Weight, Thrust, Drag
Lift… (Pg 21)
Acting through Centre of Pressure (CoP) perpendicular to RAF
Weight… (Pg 21)
Acts through Centre of Gravity (CoG) towards centre of Earth
Thrust… (Pg 21)
Acts parallel to engine crankshaft, counteracts drag
Drag… (Pg 21)
Acts opposite to direction of motion
Lift balances… (Pg 21)
Weight
Thrust balances… (Pg 21)
Drag
Couples of opposing forces are… (Pg 21)
Pair of parallel opposing forces that do not act through the same point, –> causing tendency to rotate
Thrust/Drag couple causes… (Pg 21)
Nose-up tendency
Lift/Weight couple causes… (Pg 21)
Nose-down tendency
Bernoulli’s Principle (Pg 22)
Airflow below has reduced velocity = increased static pressure, airflow above has increased velocity = decreased static pressure
Engineer’s Lift form. (Pg 23)
Mathematical eqn for how lift is achieved
Lift = (CL)(1/2)(P)(V∧2)(S) (Pg 23)
CL = Coefficient of Lift, made of Camber and AoA
P = Greek letter for Air Density
V = Velocity/True Airspeed (TAS)
S = SA of wing
Pilot’s Lift form. (Pg 23)
2 options for altering lift; AoA and (Indicated Airspeed) IAS
Lift = AoA ∝ IAS (Pg 23)
Relationship is inversely proportional
Weight: CoG is… (Pg 23)
Point at which all weight of aeroplane is concentrated