Climbing Flashcards
Vx and what is it for a jet and a prop
Greatest excess thrust
Vmd for a jet
Vmp for a prop
What happens to Vx when you increase temp
For a prop it increases due to increased TAS due to a decrease in density
Same with altitude
Stays the same with a jet for both alt and temp as it is at VMD
Vx for a heavy a/c
Faster due to the drag curve moving up and to the right
Vx for a dirty config
Will be slower due to the drag curve moving up and to the left
Vx with an engine failure on a jet
Slower due to the drag curve moving up and to the left
The effect of an engine failure on climb gradient
Reduce it to a quarter
Vx with a prop engine failure
Drag curve moves the same way as a jet but Vx gets faster to Vxse
Second segment
Engine failure
Effect of wind on flight path angle
Increases with a headwind
Decreases with a tailwind
Reducing climb angle
Anything which requires acceleration as it requires excess thrust
Turning, the need to increase speed etc
Advantages of using best rate of climb
Climb quicker, spend longer in the cruise
Roc formula
Roc = angle of climb x speed (TAS)
Roc = Pa - Pr/ W (excess power available)
Roc = g% x TAS
G% formula
T-D/w x 100
G% = roc/TAS
Vy
Speed for best rate of climb - Max roc
Difference between power required and power available is greatest
Service ceiling
Point at which the roc reduces to a specific value
100 fpm for a prop
500 fpm for a jet
Absolute ceiling
Height at which the a/c cant climb anymore
Vx is smaller than or equal to Vy
Aerodynamic ceiling
Coffin corner
Certified ceiling
The ceiling at which the a/c is certified to fly
Factors effecting roc
Increasing a/c mass as pr = drag x TAS and induced drag increases
Flaps decrease all vspeeds
Increasing altitude - Tas increases so Pr increases and the curve moves along its own tangent - Vy increases
Effect of alt on roc and Vy
Excess power and roc reduce
Vy as a CAS reduce
Vy as a TAS increases
Effect on temp with roc and Vy
On hotter days TAS increases so Vy increases
Roc reduces
Effect of engine failure on roc and VY
Everything will reduce apart from vx with a prop
The effect of wind on roc and Vy
Has no effect
Effect of acceleration and turning on roc and Vy
Reduces roc and angle of climb due to the reduced excess thrust
Angle and gradient of climb depends on
Excess thrust divided by weight
Power formula
F x speed (TAS)
