Definition
The range of airspeeds, slower than the speed for minimum power required, in which more power is needed to fly slower in level flight, and less power is needed to fly faster. In this region, the normal relationship between power and airspeed is reversed: reducing speed requires adding power rather than reducing it.
Plain English
A slow-flight speed range where slowing down actually requires more engine power, not less. The slower you go, the more power you need to keep flying level.
Context Anchor
Encountered in slow flight training, approach planning, and discussions of why very slow airplanes may need surprisingly high power to hold altitude.
Derivation
Called 'reverse command' because the pilot's normal command relationship is flipped. Normally, more power means faster; less power means slower. In this region, the throttle still controls speed, but in the opposite direction from what intuition expects.
Why Pilots Care
Recognizing this region prevents power mismanagement during slow flight, approaches, and go-arounds, reducing the risk of stall or loss of control.
Grounding Statement
At very low airspeed, the airplane can need extra power just to stay level because it is working harder to keep flying.
Intuition Check
Do not read “reverse command” as meaning the flight controls work backward. The controls still work normally; the unusual part is that slower flight needs more power to hold altitude.
Example Sentence 1
During the short-field approach, the instructor pointed out that they were operating in the region of reverse command and would need to use the throttle, not pitch, to control the descent rate.
Example Sentence 2
On final approach the pilot added power as airspeed decayed, recognizing they were operating in the region of reverse command.