balance field length
- Thread starter blee256
- Start date
FalconCapt
New Member
[ QUOTE ]
or is it balance field weight? whichever one is correct, what is it?
-brian
[/ QUOTE ]
Balanced Field Length...
Balanced Field Length is the distance it takes to accelerate to V1 (Decision Speed) on all engines, loose an engine at V1 and either abort the takeoff or continue the take off and cross a point (at the end of the Balanced Field Length at an altitude of 35 ft.
Basically the engineers adjust V1 to have these two different distances (Accelerate Stop & Accelerate-Go) become equal.
Briefly, if an engine should fail during the takeoff roll at a critical speed, called the decision speed V1, the pilot is offered the option of two safe courses of action. He may elect to continue the takeoff on the remaining engines, in which case, the takeoff distance is defined as the distance from the point at which the takeoff run is initiated to the point where the aircraft has reached an altitude of 35 feet. In the second alternative, the pilot may elect to shut down all engines and apply full braking. The decision speed V1 is chosen in such a way that the sum of the distance required to accelerate to V1 and then decelerate to a stop is the same as the total distance for the case in which the takeoff is continued following engine failure. If an engine should fail before Vi is reached, the aircraft is brought to a stop on the runway; whereas, if an engine fails at a speed greater than V1 the takeoff is continued. The distances are based on smooth, hard, dry runway surfaces.
or is it balance field weight? whichever one is correct, what is it?
-brian
[/ QUOTE ]
Balanced Field Length...
Balanced Field Length is the distance it takes to accelerate to V1 (Decision Speed) on all engines, loose an engine at V1 and either abort the takeoff or continue the take off and cross a point (at the end of the Balanced Field Length at an altitude of 35 ft.
Basically the engineers adjust V1 to have these two different distances (Accelerate Stop & Accelerate-Go) become equal.
Briefly, if an engine should fail during the takeoff roll at a critical speed, called the decision speed V1, the pilot is offered the option of two safe courses of action. He may elect to continue the takeoff on the remaining engines, in which case, the takeoff distance is defined as the distance from the point at which the takeoff run is initiated to the point where the aircraft has reached an altitude of 35 feet. In the second alternative, the pilot may elect to shut down all engines and apply full braking. The decision speed V1 is chosen in such a way that the sum of the distance required to accelerate to V1 and then decelerate to a stop is the same as the total distance for the case in which the takeoff is continued following engine failure. If an engine should fail before Vi is reached, the aircraft is brought to a stop on the runway; whereas, if an engine fails at a speed greater than V1 the takeoff is continued. The distances are based on smooth, hard, dry runway surfaces.