4 ms·

Yeah I think the innovation here is in the business model, not the engineering. I really do like the four motor design on the Rivian platform though. It opens

by jcims 7y ago

Yeah I think the innovation here is in the business model, not the engineering. I really do like the four motor design on the Rivian platform though. It opens up a lot of possibilities for improved performance/handling/safety and off-road capability. The 'tank turn' demo is kind of a gimmick but also not - https://www.youtube.com/watch?v=yzwM8KE2L3I https://www.youtube.com/watch?v=yzwM8KE2L3I Edit: Add mecanum wheels and you could strafe (at least until they fell apart): https://youtu.be/snbiKkxPgig https://youtu.be/snbiKkxPgig

gpm 7y ago
Would the "tank turn" work on asphalt? Or would that be too much friction for the tires?
- jcims 7y ago
  I would guess each motor has more than enough torque to spin the wheel so probably, but it would be way faster and a rough ride unless they were exquisitely balanced.
- dsfyu404ed 7y ago
  Skid steers turn just fine on asphalt. As long as the rest of the components can take it it will work fine (or as fine as it can given the wheelbase and track width of the vehicle doing it). I wouldn't bet on a typical consumer vehicle that makes it to production being able to take it long term. Adding enough extra beef to the drive-line to do that almost certainly fails the cost/benefit analysis.
- x3haloed 7y ago
  It might work, but Rivian has said that it should not be used on asphalt due to tire damage and maybe damage to other vehicle components.
- clouddrover 7y ago
  Yes. Here's an example in a Schaeffler 4ePerformance: https://www.youtube.com/watch?v=qeXZs_XAmME&t=720 https://www.youtube.com/watch?v=qeXZs_XAmME&t=720
fastball 7y ago
Could you not do that with the three-motor cybertruck?
- jcims 7y ago
  Possibly but it largely depends on how the torque is routed to the wheels that share a motor. It also wouldn’t likely be as repeatable and precise as this.
- threeseed 7y ago
  No. You can do a different manoeuvre but it isn't a tank turn.
- deleted 7y ago
  [deleted]
x3haloed 7y ago
Tank turn is not a gimmick. Super useful on offroad trails where space to turn around is quite limited, which is important when you get to a part of the trail that is impassible or dangerous.
- greglindahl 7y ago
  Many full-size trucks are never driven off-road or carrying/towing heavy loads, but the advertising for them always mentions these features. Some people call that using gimmicks to sell trucks.
  - x3haloed 7y ago
    So features are gimmicks when they're only useful to a subset and buyers? Even if they're very useful to a subset of buyers? That would make towing a gimmick.
    - megablast 7y ago
      On top of most big trucks never being used offroad, most offroaders never need this, and you can see that most offroad trucks do not have this.
achenatx 7y ago
imagine the tight u-turns you can make when you miss a parking spot on the other side of the street.
driverdan 7y ago
What business model? The business model of raising billions without actually selling anything?

by jcims 7y ago

gpm 7y ago

Would the "tank turn" work on asphalt? Or would that be too much friction for the tires?

jcims 7y ago
I would guess each motor has more than enough torque to spin the wheel so probably, but it would be way faster and a rough ride unless they were exquisitely balanced.
dsfyu404ed 7y ago
Skid steers turn just fine on asphalt. As long as the rest of the components can take it it will work fine (or as fine as it can given the wheelbase and track width of the vehicle doing it). I wouldn't bet on a typical consumer vehicle that makes it to production being able to take it long term. Adding enough extra beef to the drive-line to do that almost certainly fails the cost/benefit analysis.
x3haloed 7y ago
It might work, but Rivian has said that it should not be used on asphalt due to tire damage and maybe damage to other vehicle components.
clouddrover 7y ago
Yes. Here's an example in a Schaeffler 4ePerformance: https://www.youtube.com/watch?v=qeXZs_XAmME&t=720 https://www.youtube.com/watch?v=qeXZs_XAmME&t=720

fastball 7y ago

Could you not do that with the three-motor cybertruck?

jcims 7y ago
Possibly but it largely depends on how the torque is routed to the wheels that share a motor. It also wouldn’t likely be as repeatable and precise as this.
threeseed 7y ago
No. You can do a different manoeuvre but it isn't a tank turn.
deleted 7y ago
[deleted]

x3haloed 7y ago

Tank turn is not a gimmick. Super useful on offroad trails where space to turn around is quite limited, which is important when you get to a part of the trail that is impassible or dangerous.

greglindahl 7y ago
Many full-size trucks are never driven off-road or carrying/towing heavy loads, but the advertising for them always mentions these features. Some people call that using gimmicks to sell trucks.
- x3haloed 7y ago
  So features are gimmicks when they're only useful to a subset and buyers? Even if they're very useful to a subset of buyers? That would make towing a gimmick.
  - megablast 7y ago
    On top of most big trucks never being used offroad, most offroaders never need this, and you can see that most offroad trucks do not have this.

achenatx 7y ago

imagine the tight u-turns you can make when you miss a parking spot on the other side of the street.

driverdan 7y ago

What business model? The business model of raising billions without actually selling anything?