Embraer EMB145 - Page 673

AIRPLANE
OPERATIONS
MANUAL
PERFORMANCE
EMB-145 LB
REVISION 40
1-04-20
Page
1
Code
02
SUPPLEMENTARY TAKEOFF INFORMATION
TURN ANALYSIS
The method below presents the criteria for transforming a takeoff flight
path with turns in an equivalent straight one to allow the use of the
AFM charts or runway analysis software to determine obstacle
clearance.
The method to be used herein converts an actual flight path with turns
and wind eff
ects to an equivalent straight flight path with still air.
The equivalent straight flight path with still air will be determined in
terms of
increments on the existing obstacles' height that should be
taken into account to ensure obstacle clearance. With the equivalent
straight flight path, the performance calculation must be done, as
usual, as presented in the AFM.
OPERATIONAL LIMITATIONS
Maximum bank angle: All Engines Operative: 25
o
at V
2
+ 10
One Engi
ne Inoperative: 15
o
at V
2
EQUIVALENT STRAIGHT FLIGHT PATH DETERMINATION
The equivalent straight flight path (zero wind) to be used in the
perfor
mance calculation should be determined as follows:
1) OBSTACLE INCREMENT IN A STEAD
Y TURN
During a steady turn the climb gradient deteriorates. To compensate,
an increm
ent of the actual obstacle height must be obtained as a
function of the gradient loss due to a steady turn and the turning
distance flown to the obstacle by the following relation:
ΔH = D
T
x G
L
Where:
ΔH = height increment
D
T
= distance flown along the turning flight
GL = gradient loss (obtained from the gradient loss due to a
steady
turn chart)
AOM-145/1114