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

[Woodrick]

I hope this doesn’t affect FSD/Auto Pilot… it probably will though..

Different groups doing the development. The only impact may be in release scheduling.

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[charliemagpie]

The actual change is made up.. imo.. Here is the actual tweet ... Although, 'significantly' is the operative word.

 

[cvalue13]

You indicate that you have a Tesla. Should be second nature to you.

I didn't have rear seat heaters in my Model 3 when I got it. They appeared later. Hardware was there, software to control wasn't.

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?

 

[SolarWizard]

better than the F One Hundred Fifty?

no. Just different

 

[cvalue13]

Different groups doing the development. The only impact may be in release scheduling.

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.”

 

[Gurule92]

Even if it comes after delivery, it's over the air update. Real convenient like a firmware update.

Yea, but I'm excited about it and have to wait a long time so it's possible it comes out before I get mine lol. Then if there are any growing pains. They can get ironed out B4 I get it

 

[Jhodgesatmb]

Anyone else find it strange that something like a turning radius is still being adjusted at this stage of production?

Not at all. Most people find it a learning experience using 4WS and SBW with only 3 degrees. Can you imagine what 10 degrees would be like. Also, it will be a challenge getting FSD to work with these at 3 degrees. It will probably be some time before they unlock more angle from the rear wheels.

 

[PilotPete]

Anyone else find it strange that something like a turning radius is still being adjusted at this stage of production?

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.

 

[Dazajj]

Different groups doing the development. The only impact may be in release scheduling.

Yeah i meant around the release schedule

 

[Timelord]

We've heard this from a few sources. I think out of spec mentioned it. And maybe sandy? Did sandy mention it?

But I hope it comes b4 I get mine!

You hope you'll not qualify for AARP before you get yours.

 

[MilliVanilli]

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.

 

[Pops]

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.

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.

 

[HaulingAss]

Anyone else find it strange that something like a turning radius is still being adjusted at this stage of production?

No. Tesla has a cycle of continuous improvement and feature additions with all their vehicles.

 

[MilliVanilli]

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.

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 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):

 

[carsly]

I think the answer here might be pretty simple, much like Apple at some point you have to lock the software for production release so it can get loaded into the hardware. This will happen weeks before the launch, if not even earlier.

Then post-launch you can issue point updates and push out the rest of the features/functions that were still in development and testing.

Same as a smartphone.

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