Turning radius update to come! Extra 7 degrees of steering angle for rear wheel steering (from 3 to 10 degrees)

[cvalue13]

The back does swing out, even at smaller angles than the front. This was a problem even in the early days of 4WS and documented in owner's manuals, too.

It turns out @Sirfun already pointed this out this back in 2021 (including suggesting using Tesla Vision to adjust for it): (1) All wheel steering - how does it work? Check out the Honda Prelude 4WS video he posted (it had this problem with only 1.5 degrees of opposite-phase rear steer).

agreed

I mentioned some time ago that while the agility will be great, folks used to long wheelbase trucks will have to adapt to a new oddity in cases of eg pulling out of a tight parking space with cars on both sides

In*think* that where a truck used to have to pull straight out of such a spot until ~clearing the rear axel to avoid dragging the *inside* Qp, one will have to instead still pull forward until ~clearing the rear axel to avoid dragging *outside* QP

of course, once pulled forward, the CT will be able to tightly turn out, where the traditional truck might still have a 3-point turn to do (if eg the across-isle vehicles are close)

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[REM]

10 degrees will cause the back to swing out a lot more, resulting in collisions if someone is sharply steering when alongside an obstruction (wall, another car, etc.). My guess is that they're tying in vision to dynamically adjust the max angle based on how close objects are to the side.

You nailed it.

Tesla absolutely doesn't need the negative imagery of people sideswiping cars all over the news because of drivers whose confidence is far beyond their actual driving skills and awareness.

 

[Pops]

You cannot turn immediately in a tight spot without 4WS, you will swipe the curb or car on the inside. I do not see this as a major difference. Simply pull out straight and then turn. So its the same problem, different sides of the car.

I do think you are right it will require adjustments in driving behavior, but over all tighter turns are superior.

 

[Baldyloxx]

As in the past and present to ‘teach the system’… you will need hundreds of thousand of miles ‘learned’

Which will require hundreds of thousands of CTs on the road..

rite now it’s only being fondled by the click-baiters the majority of the time curbside by the bar..

this may take a while…

 

[Baldyloxx]

Maybe they should release a Droids Series.. To those willing to help expedite the teaching of the system..

 

[SentinelOne]

Anyone think of a reason to have a RWS "off" feature? aka for certain performance or off-roading situations?

 

[Coolbreeze704]

As in the past and present to ‘teach the system’… you will need hundreds of thousand of miles ‘learned’

Which will require hundreds of thousands of CTs on the road..

rite now it’s only being fondled by the click-baiters the majority of the time curbside by the bar..

this may take a while…

If you need hundreds of thousands of miles I am confused on why you would need hundreds of thousands of Cybertrucks on the road to gather that many miles?

 

[Diveflyfish]

I’m not an engineer but I imagine the capability of a 10 degree turn was finalized and already there, but software locked for whatever reason.

Yes it most likely is due to keep neophyte Fly by wire pilots from ground looping the CT….. once the learning curve of becoming one with the new feel, increased control would be available. Perhaps it was done at the request of insurance types……

 

[Baldyloxx]

Too much “looking at who’s looking at me”, fondling and posing for the camera…, not enough driving

If you need hundreds of thousands of miles I am confused on why you would need hundreds of thousands of Cybertrucks on the road to gather that many miles?

 

[Woodrick]

you’re saying that changing the turning radius of a variable SBW+4WS vehicle won’t require FSD to be further adapted?

The complications of adding variable SBW+4WS is why FSD is jammed up in the first place.

Seems not unreasonable to wonder if further changing these things this late might further delay FSD.

Certainly not the case that FAD and SBW/4WS are unrelated because there are “different groups doing the development.”

Proof? It is absolute conjecture that variable steering and FSD have anything to do with each other.
FSD really doesn't care about variable steering. And FSD has been doing steer by wire all along. Or did you think that it hands to turn the wheel?

 

[Woodrick]

are you saying they’re also going to charge for extra steering angle, and when it doesn’t play well they’ll give it for free?

Where in the crap did you get that from my statement. No, they aren't going to charge extra for it.

 

[Woodrick]

If you have never worked with Control by Wire of a vehicle, there is a “Crawl, Walk, Run” approach that is universally taken. Tesla appears to be taking this same approach, rather than the “wild cowboy“ rep with which they are often portrayed.

I also don’t see this having an impact on FSD. The rear end obviously was designed with a greater turn angle in mind. So this is just the next step towards running, and this has been most certainly in the plans all along.

And it is quite feasible that if FSD is in control, at least for now, variable steering isn't even turned on.

 

[Woodrick]

Yeah i meant around the release schedule

My statement is only that releases are periodic and vary. It might be that feature 1 is ready on Feb2 and feature to is ready on Feb 6. They just get batched together to go out Feb7.
It will not be a significant impact.
That was evident early last year as they had two branches of code, one for USS and one for Tesla vision. There were updates occurring in each branch before they came back together. So it is very probably that each will be fixed on their own schedule.

 

[Woodrick]

I don't know the math, but I do not believe this is true. If the rear steering is equal angle the front, the rear will follow the front wheels and would not swing out. As long as rear is less than front it should be fine. This is based on my experience with doing circles in roller skates lol.

And if they turn variable steering off while FSD is in charge, it does exactly like the other vehicles.

 

[Dazajj]

Hey @Dazajj, you planning on driving your CT when you get it or just pose and fondle?

Can't speak for the other FS soon to be owners but I know I will be driving the heck out of mine when delivered in Feb/March

It will be my main mode of transportation. Selling my Lexus RX350 as soon as i get a VIN assigned.

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