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Tesla Model S Gets Titanium Underbody Shield, Aluminum Deflector Plates
An anonymous reader writes "Tesla Motors made headlines several times last year for a few Model S car fires. Elon Musk criticized all the attention at the time, pointing out that it was disproportionate to the 200,000 fires in gas-powered cars over the same period. Musk didn't stop there, though. He's announced that the Model S will now have a titanium underbody shield along with an aluminum bar and extrusion. He says this will prevent debris struck on the road from breaching the battery area. Musk offered this amusing example: 'We believe these changes will also help prevent a fire resulting from an extremely high speed impact that tears the wheels off the car, like the other Model S impact fire, which occurred last year in Mexico. This happened after the vehicle impacted a roundabout at 110 mph, shearing off 15 feet of concrete curbwall and tearing off the left front wheel, then smashing through an eight foot tall buttressed concrete wall on the other side of the road and tearing off the right front wheel, before crashing into a tree. The driver stepped out and walked away with no permanent injuries and a fire, again limited to the front section of the vehicle, started several minutes later. The underbody shields will help prevent a fire even in such a scenario.' Included with the article are several animated pictures of testing done with the new underbody, which survives running over a trailer hitch, a concrete block, and an alternator."
Is he saying they've upgraded safety to piloted weapon system levels?
Help stamp out iliturcy.
This happened after the vehicle impacted a roundabout at 110 mph, shearing off 15 feet of concrete curbwall and tearing off the left front wheel, then smashing through an eight foot tall buttressed concrete wall on the other side of the road and tearing off the right front wheel, before crashing into a tree. The driver stepped out and walked away with no permanent injuries
Sounds like a scene from "the A team", where I would have been saying "that's so unrealistic"!
Only as a powder or thin shavings. As a solid block, it'd make an effective barrier.
In the event of a crash where there is grinding across the titanium shield, there would be a lot of sparks on the outside, but no damage to the batteries.
You do not have a moral or legal right to do absolutely anything you want.
We're here dealing in the realm of engineering + political risk = decisions.
There is a risk, but you can't say it was an engineering risk and just a political one.
I thought it was pretty funny as an absurdist thing. "Yes, our car caught fire after crashing through a wall at 110 MPH, an unfortunate weakness in our battery-powered vehicle which any other car would have obviously brushed aside - the driver was fine, by the way." / "Yes, our cars catch fire after merely crashing through a wall, another wall, and a tree, after which the driver walked away...we suck :( "
"These people look deep within my soul and assign me a number based on the order in which I joined" --Homer re:
So when you're driving your Tesla on the golf course, try to keep on the fairway and out of the rough. Especially avoid running over rocks and golfers carrying titanium clubs.
If you have to ask, you weren't going to buy one anyways.
You know, I usually detest any sort of PR speak. That sort of bullshit where they desperately try to spin negative news to their advantage. It's just something I've come to expect from corporations and politicians.
But this?
We believe these changes will also help prevent a fire resulting from an extremely high speed impact that tears the wheels off the car, like the other Model S impact fire, which occurred last year in Mexico. This happened after the vehicle impacted a roundabout at 110 mph, shearing off 15 feet of concrete curbwall and tearing off the left front wheel, then smashing through an eight foot tall buttressed concrete wall on the other side of the road and tearing off the right front wheel, before crashing into a tree. The driver stepped out and walked away with no permanent injuries and a fire, again limited to the front section of the vehicle, started several minutes later. The underbody shields will help prevent a fire even in such a scenario.
That is some mighty fine PR smackdown.
Sure, there were other fires, but this one they got covered.
Can we please move to the post-bullshit era where authenticity is expected?
Carbon fiber has a failure mode that you could describe as "explosive". It absorbs a lot of energy, which is what the race car driver wants, but it doesn't necessarily prevent a sharp object from penetrating the area, which is what Tesla wants.Titanium has incredible toughness given its weight, which makes it a good candidate here. It's expensive, but in a $100,000 car, so what?
Anyway, there's a reason that the A-10 pilot sits in a titanium "bathtub".
W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
Cost and strength. You can extrude something for a fraction of the cost of 3D printing or milling. You can even extrude titanium if you have a big enough press. (google "heavy press program" if you want to see some MONSTER presses.) Both extrusion and milling still have strength advantages over 3D printing. Where 3D printing shines is prototyping, small run, or fancy designs that are too difficult to extrude or cast or mill. But give it a few more years. The other methods have been around far longer, so we know how to do things well.
Haven't they already broken the safety tests by being beyond the test limitations?
Let's see, they had to come up with extraordinary measures in order to flip the Tesla for that safety test, they broke the crush machine at somewhere around the equivalent of 4 teslas stacked on top of the roof.
Thus far the Tesla has taken full advantage of it's electric design to make a vehicle that sneers at standard impact tests.
I don't read AC A human right
Golf carts have batteries.
Teslas have batteries.
Coincidence?
Gamingmuseum.com: Give your 3D accelerator a rest.
I don't understand why people see every new bit of technology like it's some magical panacea, ready for mass consumption the instant they learn of its existence.
You wouldn't try to print 100,000 books on an ink jet printer. While you might do mockups on that ink jet, you'd have the actual run output on a printing press. 3D printing is the same exact thing. Great for prototyping, but too slow, inefficient and expensive for mass production. That may change some day, but currently were a ways away from that being feasible.
Did anyone else notice those seem to be successive tests on the same car? In the alternator test you see a fastener toward the back of the belly plate gets loosened, in the trailer hitch test you see the fastener actually come out, then in the concrete block test you see the belly plate actually flap under impact, and you can see what appears to be the hole that fastener came from.
I am fairly impressed that, not only did they do real world tests (which do fall short of shearing off wheels and battering through concrete walls) but they apparently did not put the car on a lift and return it to perfect condition between successive tests.
That makes the test a bit more real world like, cars get driven and accumulate wear and tear, so they are not necessarily going to be in factory mint condition when they hit something.
You get the feeling, regardless of what you think of Musk or the car, that he is very proud of that car, and it appears justifiably so. Yes, he is defensive when the press screams disaster and trumpets doom and gloom about the car, but he doesn't ever try to hide from the press or try to spin the reports, instead he makes a change to improve the car, then does his spin on his own terms.
Obviously titanium might be a bit pricey for the "cheap" Tesla when it arrives, but I bet the anti-penetration armor design will be there, even if it ends up being constructed of less expensive materials.
In this way the response to the overhyped Tesla accidents and fires will help us all in the long run, just like the German automakers pioneered crash simulation in the 80s and 90s, and now all cars have crumple zones.
"Proximity to wonder has blunted our perception and appreciation of it" --Tim Hartnell in 'Exploring ARTIFICIAL INTELLI
> In the event of a crash where there is grinding across the titanium shield, there would be a lot of sparks on the outside, but no damage to the batteries.
Thank god a Tesla could never crash into anything carrying gasoline.
Your hair look like poop, Bob! - Wanker.
Extrusion *IS* "3D printed" with a massively parallel head that can print the entire cross-section all at once. It has been optimized to "print" something with an uniform cross-sectional area. Same can be said about pasta machine. :)
Welcome to Tomorrow done yesterday.
>You have to manage an inventory of expensive $20k+ parts that could be stolen,
All inaccessible and underground. They're also fairly useless to thieves; who would they sell a stolen Tesla Model S battery pack to?
The battery packs are heavy, unwieldy, and can't be resold to anyone. If you're a thief, there are much better targets.
>you have multiple sizes and model of battery,
All the loaner packs can be the same size and model.
> and different wear states. The batteries lose power constantly.
Since they're at the charging station, they can keep the batteries topped off. As they wear out, they'll be replaced. Tesla owns the loaner packs. The battery swap is actually a loan, not a true swap like propane. You have to go back to that station and get your original pack back.
>You have to manage liability, if you install a defective battery and it catches fire who pays.
Tesla, since they're both the manufacturer and the battery swapper.
>You have complicated machinery that you need to have many of to handle rushes that go unused at other times
It takes 93 seconds to swap batteries. http://www.teslamotors.com/bat...
They really only need one swapping machine on site for the foreseeable future, and if they get to the point where they need more swapping machines, then they're doing very very well.
Especially since swapping isn't going to be used day-to-day; you'll charge at home or work. Swapping is really only for long-distance trips.
>And you still need to have the same order of magnitude of power available to charge up the swapped out batteries as you would to just charge them in the car.
Of course. The advantage of battery swap is that you can run out your current battery, swap at the station, drive wherever you're going, come back, swap back for your now-recharged pack, and go home. 186 seconds during the trip, versus having to stop and charge for a few hours.