model S, 3, X, then the D, now a semi... what's elon trying to tell us.
S3X DRIVE could be a cheeky pun along the lines of The Boring Company.
Tesla Semi
541–550 of 575 posts
Re: Tesla Semi
#542Earlier quoted context omitted.
In the sense that both were effectively rebuilt from almost-but-not-quite-scratch for each launch, yes.
Despite claims about the future, doesn't SpaceX also refurbish their SRBs between flights?
SpaceX's rockets are all-liquid fueled. SRB = solid rocket booster.
Re: Tesla Semi
#543Earlier quoted context omitted.
lets not compare iphonex to Elon Musk's glass. I know nothing about glass, but, I trust the guy with a company called spaceX on his portfolio to make my glass right.
It's this kind of ridiculous bootlicking that makes me dislike the Musk cult with a passion.
Bow before your your betters, prole. Also, be sure to protest Thanksgiving and Columbus Day as racist by working - nothing says antiestablishment like free labor.
Re: Tesla Semi
#544Earlier quoted context omitted.
I get what you are saying, but do remember Elon made a huge point of saying they are going for massive reliability, and have a 1,000,000 mile warranty on this thing. He explicitly addressed glass (doesn't break)
Do you think other semi-truck producers don't engineer for "massive reliability"? They do, and even then all kinds of parts break from time to time, as that is inevitable for physical machines in use. Unless Tesla packages their vehicles with a force-field generator and an "anti-wear-and-tear"-machine to prevent all malfunctions, I don't see how they would make significant leaps in anything other than the drivetrain.…
I understand and don't disagree with what you are saying, but it is worth remembering the Tesla has an order of magnitude (or two) less moving parts than any of those existing big rigs. There are simply much, much less parts to wear out.
> Also, keep in mind that two years in the future, when the truck comes out, "unbreakable" glass might very realistically be a feature competitors have caught up on.
We're not discussing what competitors are doing. We're discussing how much maintenance the Tesla will need, which has nothing to do with competitors products. If you want to have a discussion about if the Tesla is competitive, that's a whole nother thing
Re: Tesla Semi
#545Earlier quoted context omitted.
I live in Australia. It took about 2 days to get totally comfortable driving on the opposite side when I visited the US. I don't think it'll matter that much.
I've been back and forth from Australia to the US enough times that it takes about five minutes for my brain to adjust to driving on the other side of the road each time. That said, my brain takes the cue from looking at what side the wheel is on (I just keep the side with myself on it close to the centre line). If I got off the plane and into a McLaren F1 then I'd probably have real problems (thankfully Avis doesn't…
I'm Australian, have been driving in Canada/US for 7 years.
Now I'm driving my Left-hand-drive Jeep on the left side of the road in Southern Africa.
I have also driven right-hand-drive vehicles on the left in Canada.
It's annoying for merging and overtaking, but it's not "difficult".
Re: Tesla Semi
#546Earlier quoted context omitted.
Why do you say it is a fraction of the cost to operate? Because the advert says so? I'll wait for concerns like the parent's to be weighed in before reaching any conclusion.
Combustion engines need lots and lots and lots of little extra bits to hit the (still very bad) efficiency numbers they have. Every extra moving part is another thing you're paying the mechanic to check, repair or replace. Good for the mechanic, bad for your trucking operation. Electric motors are brutally simple. So first that means they break down less often, second it means they're less complicated for the mechani…
Unless the conversion from speed to electricity is more efficient than to heat, shouldn't the degradation rate be the same? Or is the heat causing most of the degrading?
Re: Tesla Semi
#547Earlier quoted context omitted.
Pretty sure Model 3 production is going amazingly well, yeah. Astoundingly well. But the media's portrayal of it has people convinced otherwise. Let's try this perspective instead: "Decade-old electric car company moves up plan for mass production of new affordable long-range sedan by 2 years" And then ask ourselves, after moving it up by 2 years, does a 3-month delay mean "things are going badly"? If I say I'm going…
I'd say someone who buys robots and operates them manually by men and claims "air resistance" is the biggest challenge in robotics because they should move so fast you can't see them, looks to me as not very sophisticated. But I don't operate robots.
"It's like if you can see the robot move, it's too slow. We should be caring about air friction like things moving so fast. You should need a strobe light to see it"
https://seekingalpha.com/article/4122890-tesla-approaches-te...
Re: Tesla Semi
#548Earlier quoted context omitted.
Combustion engines need lots and lots and lots of little extra bits to hit the (still very bad) efficiency numbers they have. Every extra moving part is another thing you're paying the mechanic to check, repair or replace. Good for the mechanic, bad for your trucking operation. Electric motors are brutally simple. So first that means they break down less often, second it means they're less complicated for the mechani…
Unless the conversion from speed to electricity is more efficient than to heat, shouldn't the degradation rate be the same? Or is the heat causing most of the degrading?
Braking force in EV is from magnetic fields in the engine pushing electricity back into the battery. Magnets and copper wires do not degrade when used.
Pad brakes in EVs are only used when braking HARD, as in emergency stop. They degrade less because they are not used much.
Re: Tesla Semi
#549Re: Tesla Semi
#550Earlier quoted context omitted.
What fraction of the energy recovered by braking is actually stored? I would have thought the battery on a non-electric or non-hybrid truck would be far too small. Surely the battery gets topped off and then the extra power is dumped as heat right? Is the energy from braking really so small that it can't even fully charge the starter battery? Honest questions. I figured that since regenerative braking in cars seems t…
There will always be situations where you can no longer recover energy, fully electric or hybrid. Your battery could be full, or overheating. At that point, you have to waste the energy. I believe the normal way to handle this scenario is to just fall back to mechanical braking.
Why do most/all electric and hybrid cars have regenerative braking while ICE cars don't? It's because, as the GP said, the battery would be quickly topped up and extra energy wasted. Only electric vehicles doing frequent stops/downhills can make productive use of regenerative braking.
Potential energy lost by a truck going 10 m (vertically) downhill: 40 000 kg * g * 10 m = 4e6 J.
Capacity of car starter battery: 40 Ah * 12V = 400 Wh = 1e6 J. Let's guess a truck battery has 4 times the capacity of a car battery, so 4e6 J to full charge.
That's just down one small hill and all subsequent braking energy for the entire trip is wasted.