Definition
A unit of mechanical power equal to the work done when a force of one pound moves an object one foot in one minute. It expresses how fast work is being performed, not just how much work is done.
Plain English
It's a way of measuring how quickly work gets done. One foot-pound per minute means lifting a one-pound weight up by one foot, taking one minute to do it.
Context Anchor
Seen in airplane performance discussions when explaining power and horsepower; one horsepower equals 33,000 foot-pounds per minute.
Derivation
A 'foot-pound' is the amount of work needed to lift one pound through a distance of one foot. Adding 'per minute' turns that work measurement into a rate -- work over time -- which is the definition of power.
Why Pilots Care
Expresses engine power in a form that directly relates to climb performance and thrust available for a given aircraft weight.
Grounding Statement
If a machine lifts one pound upward by one foot in one minute, it has done work at a rate of one foot-pound per minute.
Intuition Check
Do not read “foot-pound” here as just a twisting force or as a weight. With “per minute,” it means power: how fast work is being done.
Example Sentence 1
One horsepower equals 33,000 foot-pounds per minute, so a 200-horsepower engine can produce 6,600,000 foot-pounds of work each minute.
Example Sentence 2
Climb rate improves when the engine delivers more foot-pounds per minute than needed to overcome drag and weight.