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  1. RJ: Performance testing our new Rivian dual motor drive system! [Photos & Videos] ?

    A Wrangler could do that obstacle with ease. I've done similar ones that are far more difficult (eg Golden Crack in Moab). The R1T is a great vehicle but approach/departure angle is not its forte.
  2. Initial Winter Driving on Snow -- Experience in R1T on 20" AT

    That’s good news. But have you actually tried it? With regen set to High try going down a steep snowy hill then take your foot completely off the right pedal and don’t touch the left one. Do the wheels slip? Do you have to give it a bit of right pedal to keep the wheels turning?
  3. Initial Winter Driving on Snow -- Experience in R1T on 20" AT

    Yes, what is needed is "ARS" ("Anti-lock Regen System") like ABS but for regen. Exactly the same logic just applied to the regen instead of the friction brakes. Re: airing down on snow: I'm no expert but my understanding is that it's best to use street pressure if the snow is thin enough that...
  4. Steering Wheel Not Centered

    Same here; mine's off by maybe 5 or 10 degrees.
  5. Dual vs Quad motor pros and cons?

    See 0:25 and 9:54 in Kyle's video. He has the truck in All-Terrain mode but nevertheless I can't imagine a situation where that's the correct behavior in any mode. He didn't try the same spot in Rock Crawl mode. I'm not sure it would have made any difference. Of course, it's easy enough on a...
  6. My Driver+ experience

    It's better than nothing. Barely.
  7. Dual vs Quad motor pros and cons?

    Again, with 200hp per wheel there's no need for more.
  8. Dual vs Quad motor pros and cons?

    It seems to me that it should be easy enough to implement a "software locker": just control each wheel so that they all turn at the same rate. Better yet, not quite the same rate based on the steering angle. (If you've ever driven locked up on slick rock or pavement you know how awful that can be.)
  9. Dual vs Quad motor pros and cons?

    It's extremely rare that 300hp vs 200hp to one wheel is actually useful. But given the possibility the U-joints and axles must be beefier and the possibility of breakage goes up.
  10. No winch (yet?) what is the alternative

    Has anyone ever tried to actually recover a vehicle with a come-along? My limited experience is that my arms get tired long before the vehicle more than a few feet.
  11. Initial Winter Driving on Snow -- Experience in R1T on 20" AT

    Re: regen on slippery surfaces it seems to me that they should implement something like ABS for the motors in this situation. Should be essentially the same logic as friction brake anti-lock systems: just back off the regen torque when the wheel starts to skid. This would be useful not only on...
  12. The state of the CCS charging network in USA is disappointing

    OTOH, apparently the situation is far better in Europe. What are they doing that we aren’t?
  13. A Tale of Two Trucks: Off-Road Trip to Test R1T Capabilities [Suspension / Damper Damage]

    No idea. But it’s moot: there’s no way I could do that job, especially 1000 miles from home.
  14. A Tale of Two Trucks: Off-Road Trip to Test R1T Capabilities [Suspension / Damper Damage]

    I paid the whole thing. They claimed off-highway damage is not covered by the warranty.
  15. R1T off-road efficiency [data collected from 5 trails]

    Probably not an issue. I wasn't going fast enough that the aero drag mattered much. Nor was I going so slowly that the non-propulsion loads dominate. My average for the whole set of trails was probably 20 mph or so.
  16. A Tale of Two Trucks: Off-Road Trip to Test R1T Capabilities [Suspension / Damper Damage]

    I was in "High", not "Highest". It's hard to say if it would have made any difference, though. I don't think the part was defective. I think it is a design flaw: there should be bump stops to prevent this kind of damage. But that most likely isn't going to change. To avoid this kind of damage...
  17. Inconsistent range estimates

    It seems that the left screen doesn't know what the right screen is doing: The left screen claims that we have 177 miles left. But the right screen says we'll end our trip in 126 miles with 30 miles left, implying a total of only 156 left at the current time. I'm *guessing* that the left number...
  18. R1T off-road efficiency [data collected from 5 trails]

    Another of our objectives for our recent trip was to see what kind of energy efficiency we would get when off road. Using the trip computer I got data from 5 trails: R1T Off-Road Efficiency Trail Miles kWh Altitude Start Altitude End Gain mi/kWh Notes Ophir Pass 9.7...
  19. A Tale of Two Trucks: Off-Road Trip to Test R1T Capabilities [Suspension / Damper Damage]

    It was the best of times, it was the worst of times, it was a time of joy, it was a time of frustration, it was a time of confidence, it was a time of bitter experience, in short a fortnight both rewarding and expensive. It started out well enough. We cruised from home (in Redwood City CA) to...
  20. Critical Battery Issue

    A transformer wouldn't work, transformers are AC devices. What is needed is a DC-DC converter, a much. more complicated but still inexpensive device.





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