How does landing with 0 hydraulic pressure impact landing distance?

When landing an aircraft with zero hydraulic pressure, a significant impact occurs on the operation of various systems, including the flaps and landing gear. With no hydraulic pressure, the aircraft may be unable to deploy flaps as intended. Flaps are critical during landing as they increase lift at lower speeds, allowing for a steeper approach without increasing airspeed excessively.

If the flaps cannot be deployed or are limited in their effectiveness during landing, the aircraft experiences reduced lift, leading to a longer landing roll due to the increased speed required to maintain controlled flight. As a result, the landing distance can increase dramatically—up to 90% in cases where full flap deployment is essential for achieving a safe landing configuration.

Thus, the understanding of flap operation and the need for hydraulic systems becomes essential; without the ability to use flaps properly, pilots may find themselves needing to adjust their approach and landing techniques, resulting in a potentially significant increase in landing distance.