🔋Dave Mattson📐
2.8K posts
🔋Dave Mattson📐
@DaveMattson
More batteries, please! Portable power on demand at https://t.co/B8dlq6JBag @getpwron
Seattle, WA Katılım Ağustos 2011
859 Takip Edilen1.2K Takipçiler
@mrkylefield Don't play golf in a lightning storm, even though we have lightning arrestor technology. Don't swim at the beach when there are sharks, even though we have shark cages. Don't tickle rattlesnakes, even though we have anti-venom.
Immediate cheapest thing is to recognize limits.
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@DaveMattson That's true, but leaving me stopped atop a snowy ridge in the middle of nowhere doesn't necessarily feel the safest as a passenger of a vehicle with no steering wheel.
That's especially true when we do have sensors that can handle these scenarios safely.
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This has always been a concern for me: if eyes cannot see (dense fog, direct sunlight, heavy rain, whiteout blizzard etc), visible light spectrum cameras aren't much better.
I don't see a path forward outside of adding alt sensors (lidar, radar, etc) to supplement sensing.
Sawyer Merritt@SawyerMerritt
NEWS: The NHTSA has announced that its has upgraded the probe into Tesla's FSD (Supervised) in low-visibility conditions to what’s known as an “engineering analysis.” It’s a step that is often required before the agency tells a company to issue a OTA recall, but does not automatically mean that the NHTSA will issue a OTA recall. The NHTSA said its engineering analysis follows an earlier preliminary review and broadens the probe to about 3.2 million Tesla vehicles across multiple models equipped with the system, covering most vehicles on U.S. roads.
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Check out all the Teslas plugged in at the new Quebec City Supercharger 😠
📸: Antonin R
Drive Tesla 🇨🇦@DriveTeslaca
Tesla opens two new Superchargers in Laval and Quebec City [Quebec] driveteslacanada.ca/news/tesla-ope…
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@ChadMoran @JasonKanis Correction - "before it kicks in *fully*" - regen kicks in immediately, but not at full force. FSD disengagement feathers regen in slower than simply removing foot from accelerator when driving manually.
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Comparing an emergency stopping situation to normal FSD driving is an absolutely wild cope.
JC Christopher@JCChristopher
FSD slowed down a total of nearly 30 mph within 2 seconds, to a complete stop. Imagine what it can do in 4 seconds...
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My guess as to the sequence of events:
Vehicle in FSD on freeway. Nav accidentally had vehicle in exit lane, was unable to merge into freeway lane, so it continued with the exit. Driver notices vehicle exiting and is confused.
Then in quick/simultaneous events: Driver tries to figure out how to disable FSD in a semi-panic not wanting to exit. Disables FSD via button (not brake). Driver is unsure about going straight to onramp, then discovers cones are blocking this path. Driver too slow to respond to change plan to make the right hand turn.
OR
FSD engaged, vehicle is intending to go straight onto onramp. Driver sees cones blocking the way and panics, turning off FSD via button.
Had driver turned off FSD via brake, they would've started emergency braking much earlier and would've avoided the crash.
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@DaveMattson @spyderms @ChadMoran Interesting, agreed it is correct behavior. This case could still be in that 2-3 second window. Driver should have clearly braked fully. I was just curious to behavior.
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Here's the original video, which looks like it's actual speed. I used two markers and consistently measured it. It took 75 frames in a 30 FPS video to travel 212.63 ft equating to 57.9 MPH (probably 60). The incident occurred in August of 2025.
These are just facts. Yes the driver should have intervened sooner. Yes, FSD was approaching way too fast.
Chad Moran@ChadMoran
I normally don't bother armchair quarterbacking these situations. But watching the Tesla Stans come into the comments is funny. Elon said Autopilot (FSD?) was disengaged 4s before the impact which if you watch the video looks like it was going way too fast at that point. Am I missing something?
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@spyderms @ChadMoran @ZevCyber Did some science. Disengaging FSD via button/steering/brake does same regen behavior. Regen feathers in over ~2-3 seconds after disengagement. IMHO this is correct, immediate full regen would be a safety hazard and impossible to transition from FSD to manual without jerkiness.
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@DaveMattson @ChadMoran @ZevCyber Doesn't go into full regen at least? Been a while since I've used FSD, let alone disengaged at speed 😅
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@DevinOlsenn @ChadMoran I think the scrutiny of the situation is good. We should all be trying to help FSD get better and better. FSD is not, nor will be, 100% flawless - it will still cause accidents and deaths. Let's keep pushing to make those events exceedingly rare.
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Why are you trying so hard to defend someone that lied about FSD being enabled and causing a crash?
Even if FSD was coming in a bit too quick this is still soley on the driver for failing to supervise properly - this is FSD Supervised afterall.
With that said I have NEVER seen a clip of FSD going too fast and missing a corner like this.
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It was 4 seconds from the time of FSD disengagement until the impact. However, it was 2 seconds from disengagement until the start of the turn. Which FSD should have slowed down for. That's 170 ft to go from 60 MPH to 20 MPH. Or about 0.63g of stopping force... that's hard braking.
Chad Moran@ChadMoran
Here's the original video, which looks like it's actual speed. I used two markers and consistently measured it. It took 75 frames in a 30 FPS video to travel 212.63 ft equating to 57.9 MPH (probably 60). The incident occurred in August of 2025. These are just facts. Yes the driver should have intervened sooner. Yes, FSD was approaching way too fast.
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@spyderms @ChadMoran @ZevCyber FSD fully disengages when you forcefully take over the wheel. The accelerator doesn't instantly go to 0 though, it gradually ramps off, giving the driver a second to depress the pedal to an appropriate amount and take over smoothly.
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@ChadMoran @ZevCyber I don't have HW4/v14, but yeah, I assume a wheel turn is still full disengagement.
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@Mattlinn01 Because obviously the most technically advanced vehicle Tesla makes would have baseline autopilot functionality available since 2015.
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Why do so many people think that the Cybertruck has base AP?
Nedsir@Nedsir1
Everyone commenting on this video is talking about FSD. NO, it was not FSD, it was Autopilot. Very different driving behaviours. And if you don’t know what the difference is, you are not qualified to provide analysis on the video. $TSLA
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@ogre_codes @Novoicetoday1 @ChadMoran The telemetry data is displayed in the app fascism viewer, but it is not encoded in the video as an overlay.
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I normally don't bother armchair quarterbacking these situations. But watching the Tesla Stans come into the comments is funny. Elon said Autopilot (FSD?) was disengaged 4s before the impact which if you watch the video looks like it was going way too fast at that point. Am I missing something?
Fox News@FoxNews
'TERRIFYING': Dashcam video shows the moment a Tesla Cybertruck, allegedly operating in self-driving mode, nearly sent a Houston mom and her infant off a bridge before violently crashing into an overpass barrier. The woman claims she suffered multiple injuries from the incident and is now suing the automaker for $1 million.
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@spyderms @TeslaCharging I will happily drive a few more blocks to use this charger and hit up Freddie's. The other ones don't have much amenities nearby except for a busy Wendy's.
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@TeslaCharging This one is definitely more for the locals, the other two being right off I-90. Nice to have it right next to a grocery store as well though!
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New Tesla Supercharger: Ellensburg, WA - South Water Street (16 stalls)
tesla.com/findus?locatio…
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This tiny LED near the back of the Model Y is my favorite. Too adorable.
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@matvelloso I asked Claude this question. It gave me a 500 error as an answer.
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How do you reset it when Claude only responds with 500 errors? Or is there nothing you can do other than wait for it to heal?
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Was just talking about this to my coworker last night. Apparently he's been using a gas generator to power his fridge during power outages. Talked about how he has to wake up late at night, drag the generator out of the garage, attempt to start it numerous times, etc. I was like you could use a small battery for that and it'd power your fridge all night, if not multiple days. Technically could keep the fridge connected to it at all times and use it like a UPS. Never have to think about it again.
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@getPwrOn is all about portable power. These batteries can power a fridge for 3 days and recharge your laptop 9 times. Even on foot, in the city, in an apartment. Don't do this with a gas generator!
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I was lucky to be the one to discover the new camera washers
mr fundman@mrfundman
You vs the one he told you not to worry about
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@DavidMoss How else is my depreciating asset supposed to appreciate?
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@DaveMattson Doesn’t seem like Cybertruck going to be a Robotaxi anytime soon
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