In takeoff performance, what do V1, VR, and V2 represent, and what does each indicate?

In takeoff performance, what do V1, VR, and V2 represent, and what does each indicate?

• A. V1 is the decision speed; VR is rotation speed; V2 is takeoff safety speed.
• B. V1 marks the abort decision, VR is when rotation begins, V2 is the minimum speed to safely climb with one engine out.
• C. V1 is the airframe limit; VR is the engine limit; V2 is the landing speed.
• D. V1 is the stall speed; VR is the best angle of climb; V2 is the minimum controllable speed.

Answer: (B)

In takeoff performance, those three speeds define how you manage an engine failure and get airborne safely. V1 is the speed at which you decide whether to continue the takeoff or abort. If an engine failure occurs before V1, you can still stop on the remaining runway; if it happens at or after V1, you’re committed to continue. VR is the rotation speed—the speed at which you start lifting the nose to reach the takeoff attitude. It marks the transition from acceleration on the runway to becoming airborne. V2 is the minimum speed to safely climb with one engine out. It ensures you can maintain a positive rate of climb and meet obstacle clearance with an engine inoperative, after liftoff and initial acceleration. So the option that states V1 as the abort decision, VR as rotation begins, and V2 as the minimum speed to safely climb with one engine out matches these roles most precisely. The other choices mix up what V1, VR, and V2 represent (for example, mistaking V1 for a generic or stall-related limit, or assigning V2 to landing speed) and don’t reflect the standard takeoff performance definitions.

In takeoff performance, those three speeds define how you manage an engine failure and get airborne safely. V1 is the speed at which you decide whether to continue the takeoff or abort. If an engine failure occurs before V1, you can still stop on the remaining runway; if it happens at or after V1, you’re committed to continue. VR is the rotation speed—the speed at which you start lifting the nose to reach the takeoff attitude. It marks the transition from acceleration on the runway to becoming airborne. V2 is the minimum speed to safely climb with one engine out. It ensures you can maintain a positive rate of climb and meet obstacle clearance with an engine inoperative, after liftoff and initial acceleration.

So the option that states V1 as the abort decision, VR as rotation begins, and V2 as the minimum speed to safely climb with one engine out matches these roles most precisely. The other choices mix up what V1, VR, and V2 represent (for example, mistaking V1 for a generic or stall-related limit, or assigning V2 to landing speed) and don’t reflect the standard takeoff performance definitions.