Angle Of Climb + Rate Of Climb - Ch 6 + 7

Question 1

Vx

Answer 1

The best (max) AoC for obstacle clearance

Determined by excess thrust

For a jet Vx=Vmd 4 degrees AOA
Prop: Vx

Question 2

Vy

Answer 2

Best RoC for getting to altitude quickly - most fuel efficient

All about excess power

Question 3

5% Gradient

Answer 3

3 degrees

Question 4

Gradient % =

Answer 4

T - D / W x 100

Question 5

AoC

Answer 5

Is air mass related

Question 6

Flight Path

Answer 6

Is ground related

Question 7

Accelerating and Turning

Answer 7

Less excess thrust available there fore less AoC

Question 8

Rate of Climb

Answer 8

Power Available - Power required / Weight

Excess Power / Weight

Question 9

Absolute Ceiling

Answer 9

The highest you can possibly get to

Performance limited

Vx = Vy

Question 10

Service Ceiling

Answer 10

Where RoC is reduced to with altitude

Prop: 100fpm
Jet: 500fpm

Question 11

Certified Ceiling

Answer 11

The maximum cleared operating altitude - pressurisation issues usually

Question 12

Aerodynamic Ceiling

Answer 12

Coffin corner

Based on mass and CG considerations

Question 13

Vy

Answer 13

Is where the difference between power available and power required is maximal - speed for max RoC

Jet: Faster than Vmd Prop: Vy ~ Vmd

Question 14

Wind

Answer 14

Has no effect

Question 15

Accelerating / Turning

Answer 15

Will decrease the AoC and RoC

Question 16

Summary Table

Answer 16

AoC. Vx. RoC. Vy
I Weight D. I. D. I
I Flap Angle D. D. D. D
I Alt + Temp. D. See Table. D. See table
Eng Failure. D. See table D. D.