The von Kármán–Gabrielli diagram (also Gabrielli–von Kármán diagram, GvK diagram) is a diagram which compares the efficiency of transportation methods by plotting specific
tractive force
As used in mechanical engineering, the term tractive force can either refer to the total traction a vehicle exerts on a surface, or the amount of the total traction that is parallel to the direction of motion.
In railway engineering, the term tr ...
, or specific resistance against velocity (). It was first used by
Theodore von Kármán
Theodore von Kármán ( hu, ( szőllőskislaki) Kármán Tódor ; born Tivadar Mihály Kármán; 11 May 18816 May 1963) was a Hungarian-American mathematician, aerospace engineer, and physicist who was active primarily in the fields of aeronaut ...
and
Giuseppe Gabrielli in their 1950 paper on this subject.
The basic idea is that formally, 1 kWh/100 km has the dimensional units of a
force, a resistance force amounting to .
Useful data - Cambridge repository
website repository.cam.ac.uk; see page 328.
See also
* Ragone plot
References
External links
Diagram for cargo
Diagram of changes from 1950 to 2004
Diagrams
Energy in transport
{{Energy-stub