Final week, Ford made headlines when it launched a video of its upcoming F-150 electrical pickup truck pulling what might solely be described as an unreal quantity of weight. Within the demonstration, the upcoming automobile pulled ten double-decker rail automobiles, each empty and loaded with 42 gas-burning F-150s. The burden of the rail automobiles with the pickups in them was a whopping 1.25 million pounds, however the F-150 EV was in a position to pull every little thing with none situation.
The demonstration was extremely spectacular, immediately eclipsing the feats of energy from different notable autos just like the Tesla Mannequin X, which pulled a Boeing 787 Dreamliner, and the Toyota Tundra, which towed a House Shuttle. In line with auto fanatic and mechanical engineer Jason Fenske of YouTube’s Engineering Explained channel, although, Ford’s demonstration is definitely far simpler than it seemed.
Fenske notes that each the 787 Dreamliner and House Shuttle pulled by the Mannequin X and Tundra rode on rubber tires. Then again, the rail automobiles pulled by the electrical Ford F-150 rested on metal wheels driving on metal railroad tracks. This, the engineer explains, makes a notable distinction, significantly almost about the coefficient of rolling resistance (the ratio of the pressure required to drag a rotational mass).
“Metal doesn’t deform a lot in any respect, which is why railroads use metal wheels on metal tracks. This provides as much as a particularly low coefficient of rolling resistance—about zero.0015. To drag a 10,000-pound prepare throughout a stage floor, you solely want a 15-pound pressure. For a truck to maneuver a 1.25-million-pound prepare, it solely requires about 1,875 kilos of pressure,” Fenske wrote.
The engineer provides that typically, the utmost pressure a 4WD truck can generate might be equal to its weight, largely because of the grip of its tires. For the reason that electrical Ford F-150 prototype used within the demonstration was most actually over 1,875 kilos, it will actually don’t have any points pulling the 1.25-million-pound load. Had the F-150 EV tried such a feat with a load geared up with pneumatic tires on pavement, the demonstration would most positively have resulted in a a lot completely different consequence.
Fenske’s factors have been outlined in an article on Road & Track, which delved extra into the maths behind Ford’s demonstration. A Ford spokesperson has responded to Fenske’s arguments, declaring that the engineer’s calculations didn’t consider acceleration. The engineer wrote that he’s at the moment ready for Ford to offer extra details about the demo, as a way to calculate precisely how a lot energy the demonstration took.
Whereas the F-150 EV’s feat of energy may very well be defined by the automaker’s selection of cargo, the demonstration stays fairly spectacular nonetheless. It does, if any, elevate curiosity within the upcoming automobile. Sadly, Ford Chief Product Growth Officer Hau Thai-Tang famous throughout an interview with Yahoo Finance’s The First Commerce that the all-electric model of the F-150 remains to be “a couple of years out,” although a hybrid model might be launched in 2020.