Why do planes feel like they slow down?

Why Do Planes Feel Like They Slow Down?

When flying, it is not uncommon for passengers to feel like the plane is slowing down, especially during ascent. This sensation, however, is often an illusion caused by a combination of factors.

Reduced Engine Thrust

As a plane ascends, the air becomes thinner, reducing the amount of lift generated by the wings. To maintain altitude, the plane's engines must adjust to produce less thrust. This reduction in thrust can create the illusion of deceleration, even though the plane is maintaining its required airspeed.

Diminished Takeoff Power

During takeoff, the plane's engines operate at maximum power. This surge of power creates a strong sensation of acceleration. As the plane climbs, the engines gradually reduce power to maintain altitude. This reduction in power can further contribute to the illusion of deceleration.

Perceived Shift

The initial surge of takeoff power creates a baseline for the passenger's perception of speed. As the plane climbs and the engines reduce power, the passenger's perception of speed shifts. This shift can lead to the sensation of deceleration, even though the plane is not actually slowing down.

Psychological Factors

In addition to the physical factors mentioned above, psychological factors can also contribute to the illusion of deceleration. As the plane ascends, the view from the window changes. The ground below appears to move slower, which can create the perception that the plane is slowing down.

Conclusion

While it may feel like planes slow down during ascent, this is often an illusion caused by reduced engine thrust, diminished takeoff power, and perceived shifts in speed. In reality, the plane is likely maintaining a consistent airspeed necessary for maintaining altitude.