Speed, Height, Distance conversion

Level flight deceleration allow 10kts/nm & 1kt/sec (deceleration is faster at lower weights)

Descending deceleration allow 5kts/nm & 0.5kt/sec

Idle descent allow 3nm/1000′

 

Climb Speeds

use 250KIAS until 10,000ft
then 280KIAS/M0.74 thereafter.

Best Angle = V2 + 80

Best Rate = V2 + 120

 

Cruise N1

N1 = (2 x Alt/1000) + 10         eg at FL350 = 70+10 = 80% N1

N1’s & Pitch Attitudes

Phase of flight          Kts                %N1           Attitude (deg nose up)

Level Flight:             250kts            65                4

210kts             60                 6

Flap 1,                      190kts            60               6

Flap 5,                       180kts           62             7

Gear down,

flap 15,                150kts                70              8

Gear down, &
on glideslope:

Flap 15,            150kts               52                 4.5

Flap 25,            140kts              52     4

Flap 30,           Vref + 5             55        2.5

Flap 40,           Vref + 5             62          1

 

All the above based on a gross weight of 47.5, N1 may vary by 5% and attitude by 2° at other weights.

Add 2% N1 in turns.

For single engine add 15% N1 + 5% N1 in turns.

 

Approach Profile Planning

Aim for 250kts, 10,000ft          by 30nm out

Aim for 210kts, On ILS          at 12nm

 

VRef Speeds

 

WEIGHT.	V2	QRH V2 (Col.A)
65   (65-15)60   (60-15) 55   (55-15) 50   (50-15) 45   (45-15) 40   (40-15)	150145 140 135 130 125	152146 141 135 128 122