AIRPLANE
FLIGHT
MANUAL
PERFORMANCE
CTA APPROVED
5-01
ORIGINAL
code 01 Page 19
AFM-1912
TAKEOFF FIELD LENGTH - WET AND CONTAMINATED RUNWAY
When “Airport Analysis” calculation type is selected, the wet or
contaminated runway takeoff performance is compared to the dry
runway takeoff performance, and the lesser takeoff weight is taken as
the maximum field length limited takeoff weight.
When “Given Weight” calculation type is selected, the wet or
contaminated runway takeoff performance is not compared to the dry
runway takeoff performance. The resulting distances refer exclusively
to the requested wet or contaminated runway takeoff performance.
TAKEOFF FROM GROOVED OR PFC RUNWAY
Airplane operators who wish to use the grooved or PFC runway
accelerate-stop distances must determine that the design,
construction, and maintenance aspects are acceptable for each
runway for which such credit is sought.
The airplane operator must coordinate with each Airport Authority in
order that appropriate standards are complied with.
GRADIENT LOSS IN TURN
Gradient loss in turn after takeoff is supplied by the CAFM, either for
V
2
with takeoff flaps or for V
FS
with flaps up.
Landing gear may be retracted or extended, and thrust may be
Takeoff Thrust or Maximum Continuous Thrust, with all engines
operating (AEO) or one engine inoperative (OEI).
The speed is incremented as following:
Bank Angle Takeoff Flaps Flaps Retracted
from 0° to 15° V
2
V
FS
from 15° up to 20° V
2
+ 5 KIAS V
FS
+ 5 KIAS
from 20° up to 25° V
2
+ 10 KIAS V
FS
+ 10 KIAS
Once bank angle is known, the speed is set according to table above
and the climb gradients are calculated for both wings level and the
specified bank angle. The gradient loss is the difference between both.
Notice that for wings level the climb gradient is calculated also at the
incremented speed, as applicable, not at the original V
2
or V
FS
.