• 0 Posts
  • 11 Comments
Joined 1 year ago
cake
Cake day: June 18th, 2023

help-circle


  • Is LMFP actually available in quantity? Wikipedia suggests not.

    I realized that, I put an edit on there to not specify LMFP which has only been used in EVs in a limited fashion. I was confusing NMC which is actually the most common, oops. I changed it to a generic reference.

    The problem with sodium ion batteries, apart from lower density, is that they have a shorter lifespan.

    I’ve read differing reports on that. But yeah, cycle life is a big deal. In general it’s not great for the common Li-Ion types. LFP has pretty amazing cycle life, about five times greater and rivals the NiMH king. In many cases it’s well worth the additional size and weight, but for things sensitive to it like cars and handheld devices it’s a problem.


  • Also Sodium Ion (Na-Ion) batteries are currently in production and could be a viable alternative as the technology advances and production ramps up.

    Right now Na-Ion batteries rival only the LFP type of Li-Ion battery (lithium-iron-phosphate) having a lower energy density than other Lithium chemistries. LFP is used commonly in utility power storage for its much greater safety and longevity, but it carries about 20% less power for size and weight compared to other lithium chemistries.

    At present the favored battery type for EVs are Lithium types with the highest energy density. Some combine several advantages of the various Li-Ion chemistries having the highest energy density with somewhat greater safety and longevity.

    Na-Ion is a new type of battery chemistry with lots of potential for improvement. They use more sustainable materials being cheaper and more abundant. If they could get the Na-Ion battery type within range of presently used Lithium technologies it would be a hugely better solution, a lot cheaper, a lot safer, and much easier on the environment.


  • Not going to read the article so in response to the comment, electric bicycles put people in a strange place in terms of safety. You’ve got the speeds of a motorcycle without the ability to flow with traffic. In the presence of high density traffic I’d say an e-bike is more dangerous than a motorcycle.

    I’ve been a motorcyclist most of my life and I can say you have to be super vigilant about situational awareness and ready to evade at all times. People driving in cars are not programmed to notice motorcycles. They’re always looking for cars and sometimes don’t register other hazards. It shouldn’t be that way, but nothing is going to change that as long as human beings are driving.

    My recommendation to anyone who wants to use an e-bike for regular transportation is just go to a motorcycle, it’s going to be much safer in traffic. There’s some really nice electric motorcycles now. For e-bike users you have to be extra careful. Drivers don’t see bicyclists anyway and you’re going a lot faster most of the time. A head injury at 10 mph can be fatal.


  • What an everlasting tool history will remember you as, elon.

    Biggest tool in the history of tools.

    Only clearer by the day that this was all an exercise to intentionally kill Twitter to the benefit of billionaires, fascists and other extremists.

    When I initially heard about Elon paying what he did for Twitter my first thought was he’s buying it to kill it, then I thought nobody in their right mind would spend that kind of money to carry out a personal vendetta. Now I think that’s absolutely what’s going on.

    I believe he’s killing Twitter purely for personal reasons (he hates it because people gave him shit there). I don’t think there’s some kind of grand social agenda. It would require an assumption he cares about someone other than himself. Unlikely as the guy’s ego extends past Planet 9.






  • That guy was a backyard inventor and charlatan, like those 19th century backyard aircraft inventors. It’s one thing to take yourself out of the gene pool through your own recklessness, it’s another to take others with you.

    Rush bypassed over a hundred years of engineering lessons learned the hard way with the rationale it stifles innovation. He even fired and sued one of his own employees for calling him out on it. The sub had zero certifications and then he lied to customers about it saying his designs were approved by NASA and Boeing who never even heard of the guy.

    Aside from the lack of safety engineering and lack of proper fail-safes in his design, there’s a reason engineers don’t use carbon fiber composites in subs. They have a tendency to delaminate. When used in aircraft, composites have to be examined and certified at a regular service interval with special inspection equipment.

    I think that sub was an accident waiting to happen from day one. The hull probably failed due to inspection negligence and a failure to detect delamination. That’s even if the hull could have been rated properly for 4km. If it wasn’t the hull, it would been one of the other jury-rigged systems.

    I can’t believe people smart enough to acquire the wealth for that excursion weren’t smart enough to check out the qualifications of the company hosting it. I think it was plainly obvious just looking at the sub yourself. A navigation system that consists of a consumer laptop PC and Logitech gaming controller should have been a dead giveaway.