Video: Tonneau cover closing on Cybertruck Beta!

[Ogre]

This is not the case as far as I can see. With the vault open, you can see the seats in the back. When the vault is closing, you can still see the seats and there is no motion in that area. It must be rolled up somewhere up above the back seat, but I can't see where.

See Cybergus’ post. This is the way it has always been. The cover ”Disappears” under the vault floor. The inside of the truck is too narrow at the peak of the roof for the vault cover to even fit inside.

https://www.cybertruckownersclub.co...r-closing-on-cybertruck-beta.8038/post-137508

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[israndy]

Are we sure it still rolls up? Looks like the front of the cover is up against the windshield where the light bar used to be in some of the other shots. Could it just slide under the roof In the beta design? That would explain why we’re not seeing it blocking the rear window and why the roof is longer than the original roof

 

[Ogre]

Are we sure it still rolls up? Looks like the front of the cover is up against the windshield where the light bar used to be in some of the other shots. Could it just slide under the roof In the beta design? That would explain why we’re not seeing it blocking the rear window and why the roof is longer than the original roof

If this is the case, it would have been clearly visible inside the cabin when it was parked inside with the vault open.

 

[cvalue13]

The tonneau cover will probably be standard because having the bed closed by tonneau cover is critical to obtaining the stated range numbers. No tonneau cover or open tonneau cover significantly increases aerodynamic drag and reduces range.

This has been proven incorrect as often as correct, and there’s just as much data out there that in fact open beds have a slight aerodynamic advantage over a tonneau, all things being equal

Degree to which either view remains true with the CTs exact design, is another matter. But as a general rule, pickups gain no appreciable range efficiency from a tonneau (despite the widespread fable) that isn’t equally offset by information suggesting the opposite.

Guess who does insist on this fable? (People who sell tonneaus.)

Guess who would make Tonneu’s standard features if they made an appreciable increase to pickup truck EPA mileage ratings? Every truck manufacturer scraping up range to meet fed regs - far cheaper than designing an ExoBoost platform, eg.

 

[FarAway]

I think it needs mud flaps.

 

[Crissa]

Wait. Where does the cover go when it is open? We can clearly see the back seats when the cover is open, so does it just curl up in the back roof? It seems like a rather thick cover. I'm guessing it's magic. . .

In the patent, the roll is behind the seats under the bed. Where the 'gear tunnel' is on the Rivian.

This has been proven incorrect as often as correct, and there’s just as much data out there that in fact open beds have a slight aerodynamic advantage over a tonneau, all things being equal

Degree to which either view remains true with the CTs exact design, is another matter. But as a general rule, pickups gain no appreciable range efficiency from a tonneau (despite the widespread fable) that isn’t equally offset by information suggesting the opposite.

Guess who does insist on this fable? (People who sell tonneaus.)

Guess who would make Tonneu’s standard features if they made an appreciable increase to pickup truck EPA mileage ratings? Every truck manufacturer scraping up range to meet fed regs - far cheaper than designing an ExoBoost platform, eg.

A flat tonneau is going to be very different than a sloped one.

-Crissa

 

[Blue Steel]

This is a newer beta I presume right? because the mirrors are triangles.

Yeah. It’s being called a beta. I personally think this version is about 99.9% the final production version and that any changes at this point will probably be very minor or completely invisible.

I’m sad to see the 6 seat option go away. That was a major selling point for me in 2019. But since then my older kids have become adults and don’t really want to ride around with me anymore.

 

[Cyber Canuck]

I understand not everyone is a fan of TFLtruck, but they recently did real world test tonneau cover on vs off and MPG did increase 21.1 MPG vs 19.5 MPG.

 

[Kahpernicus]

In the patent, the roll is behind the seats under the bed. Where the 'gear tunnel' is on the Rivian.


A flat tonneau is going to be very different than a sloped one.

-Crissa

To add to this traditional pickup aerodynamics take into account an open bed and maximize to that.

In some cases the covers actually make aerodynamics worse because they interrupt the flow designed behind the cab.

Granted newer trucks do take tonneaus into account during design step.

 

[Crissa]

I understand not everyone is a fan of TFLtruck, but they recently did real world test tonneau cover on vs off and MPG did increase 21.1 MPG vs 19.5 MPG.

Why do you think this is at all similar to a dual-motor sloped-back truck? Because I do not understand.

-Crissa

 

[Cyber Canuck]

True, I don't know how the sloped back of the CT will fair. Only that it makes a slight difference for normal pickup trucks.

 

[firsttruck]

I understand not everyone is a fan of TFLtruck, but they recently did real world test tonneau cover on vs off and MPG did increase 21.1 MPG vs 19.5 MPG.

TFLtruck is using a standard horizontal cover so there is still a significant amount of aerodynamic drag from turbulence off the back of the higher cabin structure.

The Cybertruck's cover that slopes from back of cabin to tailgate might add another 2-3 e-MPG over what TFLtruck saw with RAM 1500 & horizontal cover.

 

[fhteagle]

True, I don't know how the sloped back of the CT will fair. Only that it makes a slight difference for normal pickup trucks.

Area rule aerodynamics. The most efficient shapes are those that smoothly and slowly change the total cross sectional area viewed from front to back. Graphing out that area from front to back, you want it to look as much like an egg with the blunt end forward as possible for subsonic moving vehicles.

A vertical back window drags a bubble of separated, turbulent, nearly still air behind the vertical window, which "fills in the egg graph". Tailgate up holds on to a large bubble relatively well. Closed tonneau makes the bubble smaller, but not zero, and sometimes it does fall off the bed area, meaning a new bubble has to be "accelerated" to the speed of the truck to re-attach. Tailgate down doesn't let the bubble stick to the window, it falls out of the bed too easily, constantly requiring a lot of new air to re-fill in the void created. Sloped tonneau doesn't need a bubble at all, so the total boundary layer volume dragged along with the truck is less.

TLDR: sloped tonneau good for aero, in any other design nature tries to fill the void creating more drag.

 

[AlDente]

This is interesting. So according to this (Patent?) document it obstructs the center rear window view when closed. The rear window seems marginal anyway so I suppose the cameras provide the best rear view.

 

[Marcia Litsinger]

I hope mud and leaves are not a problem to cover. We haul all kinds of stuff. All compost to me.

If you are reasonably bright, you will not roll it up when it’s covered with large amounts of mud, snow, or leaves.

But Tesla makes vehicles for all sorts of people so they likely have a leaf solution.

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