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  1. R.I.P.

    Quad motor vs locking diff

    Sorry, remember, I am an old Oregon Longhair... So not as up on this online stuff as most... What is "Chat GPT?"
  2. R.I.P.

    Quad motor vs locking diff

    "Are you saying (RIP) that in your case you'd want an OPEN diff?" Yes. The power of an open diff is the biggest thing the quad motor design is missing, and the reason it is incapable of safeguarding rolling friction.
  3. R.I.P.

    Very disappointing snow experience

    Yes... For the love of God, please do.🤦
  4. R.I.P.

    Very disappointing snow experience

    For sure, the best tires possible and preferably studs help mask the problem.
  5. R.I.P.

    Very disappointing snow experience

    Lol. "pontificate". <best Bevis cackle> BBQs are good. I pontificate better when there is beer too. 👍
  6. R.I.P.

    Quad motor vs locking diff

    BINGO! Exactly. Tesla has given a numerous examples, and are about to offer up another one for us; the Tri-motor CT. That is the model I have reserved, but I intend to change that (when they let me) after my experience with the Rivian. Tesla has some pretty good programmers, but I don't...
  7. R.I.P.

    Quad motor vs locking diff

    Sure. The vehicle and computer system could then make an educated guess as to which wheels to put into "freewheel" mode and when. I wonder, do you think there would ever be a situation where the dynamic changes, and the wheels with the most grip all of a sudden change with it? Oh, let's say...
  8. R.I.P.

    Quad motor vs locking diff

    The principal of rolling friction.
  9. R.I.P.

    Rivian battery overheating during charging in cool weather

    For those that wonder why the truck is overheating even in very cold weather, a good source of research is the design iterations of the Nissan Leaf. The engineers in that project grossly overestimated how much heat they could dissipate naturally; and that pack was designed to be air cooled; not...
  10. R.I.P.

    Rivian battery overheating during charging in cool weather

    Well, I would refer you back to my original post. The pack is well insulated, and is able to shed very little of the heat generated into the atmosphere naturally. It must be drawn out through the cold plate. Sure, the conditioning system will run more efficiently in this case when it is colder...
  11. R.I.P.

    Rivian battery overheating during charging in cool weather

    Except that in all the instances you refer to, the manufacturer started out conservatively, and ramped up the ability of the vehicle as enough data was gathered. In this case, the vehicle is overheating during dcfc, so it's the opposite case of all your other examples.
  12. R.I.P.

    Rivian battery overheating during charging in cool weather

    Wow. The only instance I am aware of where this allegedly happened was with a Ford lightning, and it destroyed the vehicle. This is a massive failure of how the system is designed to work, and should really never happen.
  13. R.I.P.

    Rivian battery overheating during charging in cool weather

    Yes, I have. But I put a lot of miles on it while I had it, including a trip into Mexico. I got quite familiar with it.
  14. R.I.P.

    Rivian battery overheating during charging in cool weather

    That is correct. On the Ford F-150 Lightning, they fixed an air damn fault issue with an over-the-air update recently. The problems on the air dam are a less-than-optimal system for raising and lowering it. The less-than-optimal system of course was not corrected with an over-the-air update...
  15. R.I.P.

    Rivian battery overheating during charging in cool weather

    Then you are not seeing the overheat throttling the way so many of us are? Wierd it would affect some of us but not others. Do you DCFC heavily?
  16. R.I.P.

    Rivian battery overheating during charging in cool weather

    Welp, the purpose of my post was to shed light on why we are seeing the dcfc throttling due to heat. I understand that there are those that want do debate absolutely everything, and cry "misinformation" if there is the slightest challenge to their belief set, but that post was not for those...
  17. R.I.P.

    Rivian battery overheating during charging in cool weather

    Oh. My. "Gravity...?" 🤦 No, it has nothing to do with gravity lol. It has to do with thermal dynamics, but to simplify that, heat rises. Because heat rises, if you apply a heating Force to a mass, the top of the mass will end up significantly hotter than the base of the mass. Because of these...
  18. R.I.P.

    Rivian battery overheating during charging in cool weather

    Indeed it did. Just trying to he helpful. :cool: 👍
  19. R.I.P.

    Rivian battery overheating during charging in cool weather

    That is absolutely true, and one of the critical challenges to pack thermal management. I am actually a fan of the cold plate design for that reason. I am not in their design room to know of any obstacles to adding a 2nd cold plate on top of the upper pack, but I think it would he a way to...
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