Rivian-WI

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Interesting (and what I would expect from 4 separately controlled motors), the wheels stopped when up in the air.
 

Trandall

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Great post. I'm not an off road enthusiast but that is impressive to me.
 

electruck

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Interesting (and what I would expect from 4 separately controlled motors), the wheels stopped when up in the air.
I wouldn't necessarily expect the wheels to stop spinning completely as that would imply the motors are being used to apply a reverse torque to prevent them from spinning freely which is slightly wasteful. Or perhaps they are appyling the mechanical brakes? I would certainly expect the motors to disengage in this scenario but am somewhat surprised the wheel doesn't continue to spin freely. Makes me wonder if they found a good reason to actually "brake" the lifted wheel or if this was done for customer perception (especially after all the comments about the tires spinning up in response to earlier AZ offroad videos).
 

skyote

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For that terrain, that suspension looks SMOOTH!
 

Trandall

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Electruck, could it be that the independent motors default to regen when no power is applied and without inertia that would stop the wheel and not be a waste of applying power at zero torque? Not sure if I stated that correctly. Just a thought based on principles I learned from reading other threads.
 

electruck

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Electruck, could it be that the independent motors default to regen when no power is applied and without inertia that would stop the wheel and not be a waste of applying power at zero torque? Not sure if I stated that correctly. Just a thought based on principles I learned from reading other threads.
Whether default or driver setting, that's actually a really good theory.
 

skyote

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Whether default or driver setting, that's actually a really good theory.
Might even be that the truck is in an off road mode & knows it's going downhill. All wheels are probably in regen.
 

DucRider

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I wouldn't necessarily expect the wheels to stop spinning completely as that would imply the motors are being used to apply a reverse torque to prevent them from spinning freely which is slightly wasteful. Or perhaps they are appyling the mechanical brakes? I would certainly expect the motors to disengage in this scenario but am somewhat surprised the wheel doesn't continue to spin freely. Makes me wonder if they found a good reason to actually "brake" the lifted wheel or if this was done for customer perception (especially after all the comments about the tires spinning up in response to earlier AZ offroad videos).
Brake are applied (lights are on) until they get towards the bottom of the hill at the end of the clip.
 

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