What aerodynamic event occurs when the left engine's slipstream impacts the tail of the aircraft?

The event that occurs when the left engine's slipstream impacts the tail of the aircraft is a yaw stabilization effect. In a twin-engine aircraft like the Beechcraft Travel Air BE-95, each engine produces a slipstream that interacts with the airframe and can induce certain aerodynamic forces.

When the left engine generates thrust, its slipstream travels over the aircraft and impacts the tail, which can enhance the stability of the aircraft's yaw behavior. This is due to the increased pressure on the tail surfaces, which helps maintain directional control and can counteract any yaw induced by differential thrust or other factors. The slipstream from the left engine tends to cause a force that stabilizes yaw movement, making the airplane less prone to unwanted yawing motion towards the left or right.

In the context of the other options, a pitch increase refers to a change in the aircraft's angle of attack and is influenced by factors unrelated to engine slipstream. Left roll tendency and right roll tendency are related to how engines produce torque or differential thrust, often causing the airplane to roll towards or away from the side of the engine producing more thrust. However, the stabilizing influence of the left engine’s slipstream on the tail specifically relates to yaw stabilization, making that the correct