von Kármán–Gabrielli diagram

A Gabrielli–von Karman diagram

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, or specific resistance $(ε = P/mgv = E/mgd)$ against velocity ( $v$ ). It was first used by Theodore von Kármán and Giuseppe Gabrielli in their 1950 paper on this subject.^[1]^[2]^[3]

The basic idea is that formally, 1 kWh/100 km has the dimensional units of a force, a resistance force amounting to 36 N.^[4]

References[]

^ "What price speed? Specific power required for propulsion of vehicles", G. Gabrielli and Th. von Kármán, Mechanical Engineering 72 (1950), #10, pp. 775-781.
^ "What Price Speed - Revisited", The Railway Research Group, Imperial College, Ingenia 22 (March 2005). PDF with the graphs
^ pp. 385-386, Springer Handbook of Robotics, eds. Bruno Siciliano and Oussama Khatib, Springer, 2008, ISBN 978-3-540-23957-4, doi:10.1007/978-3-540-30301-5.
^ Useful data - Cambridge repository website repository.cam.ac.uk; see page 328.

External links[]

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[1] "What price speed? Specific power required for propulsion of vehicles", G. Gabrielli and Th. von Kármán, Mechanical Engineering 72 (1950), #10, pp. 775-781.

[2] "What Price Speed - Revisited", The Railway Research Group, Imperial College, Ingenia 22 (March 2005). PDF with the graphs

[3] . 385-386, Springer Handbook of Robotics, eds. Bruno Siciliano and Oussama Khatib, Springer, 2008, ISBN 978-3-540-23957-4, doi:10.1007/978-3-540-30301-5.

[4] Useful data - Cambridge repository website repository.cam.ac.uk; see page 328.

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von Kármán–Gabrielli diagram

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