useful load - meaning and definition. What is useful load
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What (who) is useful load - definition

RATIO OF THE MASS TO BE TRANSPORTED COMPARED TO THE TOTAL MASS OF THE VEHICLE, INCLUDING FUEL
Useful load fraction

useful load      
¦ noun the load carried by an aircraft in addition to its own weight.
Useful idiot         
DEROGATORY TERM FOR A PERSON PERCEIVED TO PROPAGANDIZE FOR A CAUSE WITHOUT FULLY COMPREHENDING THE CAUSE'S GOALS
Useful Idiots; Useful Idiot; Useful idiots; Poleznye idioty; Useful idiots of the West; Useful innocents; Useful innocent; Idiotarian; Useful fool; Useful fools; Korisne Budale; Idiots utiles; Idiot utile; Polezniye duraki; Polezni durak; Unwitting agent
In political jargon, a useful idiot is a term for a person perceived as propagandizing for a cause -- particularly a bad cause originating from a devious, ruthless source -- without fully comprehending the cause's goals, and who is cynically used by the cause's leaders. The term was originally used during the Cold War to describe non-communists regarded as susceptible to communist propaganda and manipulation.
Load (computing)         
  • [[htop]] displaying a significant computing load (top right: ''Load average:'')
AMOUNT OF COMPUTATIONAL WORK PERFORMED
Load average; Unix load average; System load; Load Averages; Load averages; Load Average; System load average; Load times; Loadavg; IOtop (Unix); Load (Unix)
In UNIX computing, the system load is a measure of the amount of computational work that a computer system performs. The load average represents the average system load over a period of time.

Wikipedia

Payload fraction

In aerospace engineering, payload fraction is a common term used to characterize the efficiency of a particular design. Payload fraction is calculated by dividing the weight of the payload by the takeoff weight of aircraft. Fuel represents a considerable amount of the overall takeoff weight, and for shorter trips it is quite common to load less fuel in order to carry a lighter load. For this reason the useful load fraction calculates a similar number, but based on the combined weight of the payload and fuel together.

Propeller-driven airliners had useful load fractions on the order of 25–35%. Modern jet airliners have considerably higher useful load fractions, on the order of 45–55%.

For spacecraft the payload fraction is often less than 1%, while the useful load fraction is perhaps 90%. In this case the useful load fraction is not a useful term, because spacecraft typically cannot reach orbit without a full fuel load. For this reason the related term propellant mass fraction, is used instead. However, if the latter is large, the payload can only be small.