Embraer EMB145 - Page 707

AIRPLANE
OPERATIONS
MANUAL
PERFORMANCE
EMB-145/135 FAA
REVISION 41
1-04-30
Page
7
Code
02
Copyright © by Embraer. Refer to cover page for details.
AOM
-
145/1114
Apply corrections to the reference contaminated unfactored landing
distance according to the formula below:
Final altitude correction (%) = Altitude correction from the table x
(Current Altitude in ft/1000 ft)
Final tailwind correction (%) = Wind correction from the table x
(Current tailwind component in kt/5 kt)
Final overspeed correction (%) = Overspeed correction from the table
x (Current overspeed in kt/5 kt)
The unfactored landing distance on contaminated runways (CULD)
becomes:
Additional Distance = CULD
REF
x (Final Altitude Correction + Final
Tailwind Correction + Final overspeed Correction)
CULD = CULD
REF
+ Additional distance
S
uppose:
Airport pressure altitude: 4000 ft
Wind: 10 kt headwind
Overspeed: V
REF
+ 5 kt
CULD
REF
: 2000 ft
Altitude correction: 3%
Wind correction: 11%
Overspeed correction: 9%
Calculations:
Final Altitude Correction = 3% x (4000 ft/1000 ft) = 12%
Final Tailwind Correction = 11% x (0 kt/5 kt) = 0%
Final Overspeed Correction = 9% x (5 kt/5 kt) = 9%
Unfactored landing distance on contaminated runway:
Additional Distance = 2000 ft x (12% + 0%+ 9%) = 2000 ft x 21% =
420 ft
CULD = 2000 ft + 420 ft = 2420 ft