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Tesla Semi faces new wave of skepticism from diesel veterans
There is very little doubt that the Model S, Model X, and Model 3 have disrupted their respective segments since they were released. Tesla aims to accomplish the same thing with its all-electric Semi truck, but the vehicle’s target is a lot more ambitious — it aims to disrupt the trucking industry.
The trucking industry is vast, and it is still growing. Long-haul trucking stands is the lifeblood of the US economy, handling the transportation of up to 71% of food, retail goods, construction supplies, and other cargo delivered every day. The American Trucking Associations’ American Trucking Trends 2018 report revealed that the US trucking industry generated $700.3 billion in economic activity in 2017, representing a 3.5% increase compared to 2016 when the trucking market generated $676.6 billion. This is the market that Tesla is aiming to tap into with the Semi.
One of the Tesla Semi’s main selling points is that it’s an environmentally-friendly vehicle. Being all-electric, the Semi is a zero-emissions truck. This is an advantage over conventional diesel trucks, which are a significant source of air pollution in the United States. According to the Environmental Protection Agency, greenhouse gases from medium and heavy-duty trucks were found to have increased by 85% between 1990 to 2016, accounting for about 23% of carbon emissions from transportation in 2016. This is despite the fact that diesel engines are getting steadily cleaner. The EPA estimates that emissions from current engines are about 85% lower than before 2007 when the US rolled out new standards.
The Tesla Semi has several features that make it a viable alternative to diesel-powered long-haulers, from its four Model 3-derived electric motors, its comparable Class 8 hauling capacity, and its superior speed. That said, it appears that America’s diesel veterans would not give up without a fight. In a statement to Bloomberg, Jon Mills, a spokesman for engine maker Cummins Inc. noted that electric trucks have a long way to go before they could be considered competition for diesel trucks.
“Right now, we don’t think it’s viable. Electric trucks are more viable where you have shorter routes, less loads and you’re able to recharge,” he said.
Cummins Inc. is one of America’s premier engine-makers, supplying engines for consumer trucks, fire engines, and heavy-duty long-haulers. Most of the company’s engines run on diesel, though they are also making some that operate on natural gas. Mills noted that Cummins is developing electric motors as well, but the company does not expect a lot of demand for them anytime soon.
Mills did admit that electric trucks would contribute to reducing pollution. Nevertheless, the Cummins Inc. spokesman noted that the trucking industry is likely not ready to switch to electric, mainly since vehicles like the Tesla Semi have limited range. Considering that some truck drivers are paid by the mile, they would likely lose money while waiting for their vehicles’ batteries to recharge.
“Diesel will be the primary option for heavy duty trucking markets, long haul especially, for a decade or more,” Mills said.
Elon Musk wants to initiate the transition sooner. When unveiling the Tesla Semi’s specs, Musk noted that the electric long-hauler would be cheaper to operate than comparable diesel-powered trucks. Musk noted that the Semi could cost operators $1.26 per mile to run, less than the standard $1.51 per mile that diesel-powered vehicles cost. That said, Allen Schaeffer, executive director of the Diesel Technology Forum trade group, is skeptical of Musk’s claims, noting that there is little need for a new entrant in the shipping industry.
“It’s easy if you’re just coming into this market to say ‘they’re $1.50 per mile and we can do it for $1.20. But where’s the proof? I haven’t seen it. Diesel is the benchmark for energy efficiency. Diesel dominates the entire sector,” he said.
Amidst continued reservations from veterans in the trucking industry, Tesla is nonetheless pushing through with further development of the Semi. The company has been conducting real-world tests of the Semi since the vehicle was unveiled, and during the Q2 2018 earnings call, Elon Musk noted that improvements to the truck are being made. Thus, when the Tesla Semi enters production, the long-hauler would be an even more viable alternative to diesel-powered trucks.
“We’ve made significant improvements to the design since the unveiling that we had, and it’s really even better than what we talked about,” Musk said.
Tesla announced on Monday that the Roadster event scheduled for today would be postponed due to the need for it to be held outside.
Less than 24 hours later, CEO Elon Musk broadened that by stating it was due to high winds, immediately sending everyone into a frenzy over the Roadster’s potential ability to fly.
And realistically, it could definitely have to do with it flying, hovering, or hopping; whatever Tesla has in mind for this demonstration could not be impacted by wind. However, it might have nothing to do with the vehicle flying whatsoever, and instead could be a simple precaution, as the Roadster is a very unique vehicle with some already official specs that are just mind-blowing.
Tesla will very, very likely be showcasing both the acceleration rate and potentially even a top speed demo at the event in Waco. Both of these demonstrations, performed with a vehicle that has such incredibly fast metrics, could easily be impacted by wind as well.
Tesla Roadster event requires restricted airspace, and the FAA obliges
Top Speed Demo
At high speeds, aerodynamic forces are already overwhelmingly present. A crosswind or sudden gust adds a layer of sideways force that the tires must counter with slip angle. On a short demo course, that force can shove the car off the intended line, especially in a light car with a low frontal area and little mass to resist the push.
Electric cars, due to their battery packs, have an advantage of an extremely low center of gravity, giving them extra stability. However, the speeds at which the Roadster could travel at the demo could spell some issues if crosswinds are present.
Gusts are worse than a steady wind because the load changes faster than a driver can smoothly correct. That shows up as weaving or a late correction. Headwinds and tailwinds can also spell disaster. Headwinds cut a measured top speed but raise the power needed to get there or maintain it. Meanwhile, a tailwind can inflate the top speed, and downforce issues could become more noticeable.
Wind also loads the body unevenly. A low car can feel light on the upwind side or see a sudden change in downforce if the gust hits a wing or diffuser at an angle. Tire temperature and pressure might stay near a normal level, but lateral grip can be lost as the vehicle is spent fighting the wind.
Acceleration Demo
Launch and 0-60 MPH runs are shorter, so the car spends less time exposed to forces that could cause things to go awry. However, the first second is very sensitive, as a crosswind at launch could yaw the car before speed builds and prior to aerodynamic impact being too great. The driver will be required to correct traction control or manage how much the wheels are spinning, which will likely be corrected automatically by some sort of traction control system within the Roadster (we are fairly certain Tesla will implement something brilliant with it).
These things could cause an unstable run.
A headwind would increase drag as speed rises, while a tailwind would do the opposite. Meanwhile, surface effects, like wind-driven dust, light debris, or even rain, could reduce grip at the exact moment the tires are asked for peak longitudinal force. Standing water plus a crosswind is a common reason an acceleration attempt might be scrapped.
Flying or Not
No matter what Tesla has in store for the Roadster, waiting for ideal conditions is a great idea. People who follow and support the company, along with the engineers involved in the Roadster program, have been waiting nine years since the last unveiling for this moment. Everything should be ideal.
Some speculate that it’s just not ready, and that’s ridiculous. Why would Tesla even schedule the event — albeit prematurely — after nine years if it was not ready? Why would they jump the gun now?
We were all excited for today, but it truly is the most ideal thing in the world to wait two more weeks so everything, including the weather, can be perfect. The delay is simply worth it. But Tesla, seriously, make this the last one.
Elon Musk
SpaceX nails “Lucky 13” astronaut launch, leaning into Tesla tradition and superstition
SpaceX launched Crew-13 astronauts to the ISS Thursday, setting up a record fast Dragon docking.
SpaceX launched NASA’s Crew-13 mission to the International Space Station on Thursday morning, getting four astronauts to orbit despite a forecast of thunderstorms and gusty winds that had threatened to push the flight to Friday.
Falcon 9 lifted off from Space Launch Complex 40 at Cape Canaveral Space Force Station at 11:10 a.m. ET carrying Dragon Grace, NASA confirmed. On board are NASA commander Jessica Watkins, NASA pilot Luke Delaney, Canadian Space Agency astronaut Joshua Kutryk and Roscosmos cosmonaut Sergey Teteryatnikov. The first stage booster, B1101, landed at Landing Zone 40 beside the pad on its third flight after previously supporting Crew-12 and a Starlink mission.
Liftoff of Crew-13! pic.twitter.com/vteT0DXMTh
— SpaceX (@SpaceX) October 1, 2026
It was the first spaceflight for Delaney, Kutryk and Teteryatnikov. Watkins, who flew on Crew-4 in 2022, became the first NASA astronaut to launch aboard a Crew Dragon twice.
Before launch, the crew rode to the pad in Teslas, a tradition on NASA’s SpaceX crew flights since 2020. This time the cars carried specialty plates reading “Lucky 13.” Watkins said the mission patch leans into the number on purpose, as a nod to Apollo 13 and the resilience of that crew.
Grace is now on a short trip to the station. Docking at the forward port of the Harmony module is scheduled for about 7 p.m. ET, roughly 7 hours and 50 minutes after liftoff, which Space.com notes would be the fastest Crew Dragon transit to the ISS yet. Most Dragon flights take around 15 to 24 hours to catch the station. Hatch opening is planned for 8:25 p.m. ET.
The launch came more than two weeks later than originally planned. An oxidizer leak was found in Grace’s propulsion system in August, and NASA and SpaceX added time for tests. That pushed back the return of Crew-12, which has been aboard the station since February and is now set to splash down off Southern California next week. Crew-13 is expected to stay about six months.
SpaceX rescue mission for stranded ISS astronauts nears end — Here’s when they’ll return home
SpaceX already holds NASA orders for crew rotations through Crew-17, while Boeing is preparing an uncrewed Starliner flight to the station as early as December.
Crew-13 was only the first of three SpaceX launches planned for Thursday, as Teslarati previewed on Wednesday. A Falcon 9 launched its Transporter-18 mission from California today, where Google will be launching its first orbital artificial intelligence (AI) test satellite. Meanwhile, Falcon Heavy is set to launch the classified NROL-97 mission for the National Reconnaissance Office from Launch Complex 39A at 11:53 p.m. ET. Its two side boosters will return to Landing Zones 1 and 2, which means Central Florida could hear up to three sonic booms in a single day. The busy stretch follows Starship’s Flight 14 on Monday, which reached orbit for the first time.
Tesla has moved its Wireless Charging efforts for its electric vehicles forward, as it had a new patent published today, one that it submitted back in March.
The patent describes a system for detecting foreign objects on the wireless charging pad under varying temperatures, aiming to mitigate any undesired results that could come from something being on top of the charging pad.
🚨 Tesla has a new patent application published today, which was submitted back in March, for a Wireless Charging Pad:
“The present disclosure relates to methods and systems that can reliably detect foreign objects on a wireless charging pad under varying temperatures. In some… pic.twitter.com/LIeLfZAuDJ
— TESLARATI (@Teslarati) October 1, 2026
The abstract of the patent states:
“The present disclosure relates to methods and systems that can reliably detect foreign objects on a wireless charging pad under varying temperatures. In some examples, an object detector can utilize a set of inductive coils included in resonant tanks, and excite the resonant tanks using signals in a range of frequencies including or near a nominal resonant frequency of the resonant tanks. The object detector can detect a metal object based on resistance of a coil increasing and inductance of the coil decreasing. By analyzing the shifts and/or distributions in resonant frequencies and output magnitudes (e.g., output voltage peaks), the object detector can distinguish between changes of frequencies and magnitudes caused by temperature and those caused by foreign objects to accurately detect the foreign objects.”
The object detection system will utilize a set of inductive coils included in resonant tanks, and “excite the resonant tank using signals in a range of frequencies including or near a nominal resonant frequency of the tanks.” Metal can be detected by an increase in the coil’s resistance and a decrease in the coil’s inductance.
By analyzing shifts or disruptions in resonant frequencies and output magnitudes, the system can detect foreign objects. These types of safeguards need to be implemented through the normal operation of the charging pads.
Tesla says its Cybercab wireless charging efficiency is ‘well above 90%’
Tesla plans to utilize wireless charging with Cybercab and Robotaxi-enabled units to help streamline the fully autonomous experience from A to Z. The last thing the company wants to do is have any sort of small obstruction preventing the rider from experiencing Robotaxi as intended.
Why Tesla Roadster unveiling delay might have nothing to do with it flying
SpaceX nails “Lucky 13” astronaut launch, leaning into Tesla tradition and superstition
