useful load - translation to ελληνικό
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useful load - translation to ελληνικό

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

useful load      
ωφέλιμο φορτίο
dummy antenna         
  • Four heavy duty dummy loads used at an amplifier shootout
  • Microwave dummy load designed to attach to [[waveguide]].
DEVICE USED TO SIMULATE AN ELECTRICAL LOAD
Electronic load; Electronic Load; Dummy antenna
ομοίωμα κεραίας
water line         
  • Load line mark and lines on the hull of a ship
  • Load line markings on a cereal carrier, certified by [[Bureau Veritas]].
  • [[Samuel Plimsoll]]
  • Passenger vessel with two allowed subdivision load lines
  • Passenger vessel with one allowed subdivision load line
  • Passenger vessel with no allowed subdivision load line
SPECIAL MARKING THAT INDICATES THE DRAFT OF THE SHIP AND THE LEGAL LIMIT TO WHICH A SHIP MAY BE LOADED FOR SPECIFIC WATER TYPES AND TEMPERATURES IN ORDER TO SAFELY MAINTAIN BUOYANCY, PARTICULARLY WITH REGARD TO THE HAZARD OF WAVES THAT MAY ARISE
Plimsoll line; Plimsol line; Plimsoll Mark; International load line; Load-Line; Water line; Reserve buoyancy; Ship's load line; Plimsoll Line; Plimsoll symbol; Plimsoll mark; Loadline; Waterlines
ίσαλος

Ορισμός

useful load
¦ noun the load carried by an aircraft in addition to its own weight.

Βικιπαίδεια

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.