Final answer:
The Two-Engine climbout speed is 10 knots greater than Vco to provide a margin of safety in case of an engine failure and ensure a safe climb. This extra speed helps compensate for reduced engine performance and allows the aircraft to generate more lift and maintain a positive climb rate. Having a higher climbout speed allows the aircraft to clear obstacles and achieve a steeper climb angle.
Step-by-step explanation:
In aviation, the Two-Engine Climbout Speed refers to the minimum speed required for an aircraft with two engines to maintain a safe climb after takeoff. On the other hand, Vco (Critical Engine-Out Speed) is the minimum speed required for an aircraft to maintain level flight in the event of an engine failure. The reason why Two-Engine climbout speed is 10 knots greater than Vco is to provide a margin of safety and ensure that the aircraft can safely climb even if it loses an engine.
The extra 10 knots of speed helps compensate for the reduced engine performance in case of an engine failure. It allows the aircraft to generate more lift and maintain a positive climb rate. This safety margin is necessary to ensure that the aircraft can clear obstacles and make a safe climb to its cruising altitude.
By having a higher climbout speed, the aircraft is able to achieve a steeper climb angle, which helps clear obstacles like buildings, mountains, or trees, especially during takeoff when the aircraft is at its heaviest. This is crucial for the safety of the passengers and the aircraft.