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That Tesla Data: What It Says and What It Doesn’t

wheels.blogs.nytimes.com

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Re: That Tesla Data: What It Says and What It Doesn’t

#151

Post by niggler »

HelloMcFly wrote: post #44
nirvana wrote: post #34

Earlier quoted context omitted.

The answer is very simple: Brody is lying about what Tesla told him, just like he's told many other lies in his article and in the rebuttal. Putting it into a "he said / she said" is a smokescreen. The car might be a lemon but the idea that Tesla told him to run the heater to charge the battery is beyond credulity. This is not exactly the first time the NYT has told lies for ideological reasons. The paper does it reg…

Good thing Musk is willing to "stand up to them" given that he's the truly unbiased one in this situation, right? He's playing an angle here too. And the other article ( http://www.theatlanticwire.com/technology/2013/02/elon-musks... ) casts some doubt on his loud protestations. And they've only released their summarized charts, not the raw log data, anyway. It's already a "he said / she said" situation, it's just th…

HN has a deeper problem. I don't think the entire crowd is biased, but due to the karma system a few people have louder voices (their posts show up at the top and stay there for a long time, even when they aren't the best responses). Some of those people are very opinionated and their opinions happen to be sticky. The algorithm should change.

Re: That Tesla Data: What It Says and What It Doesn’t

#152

Post by chm »

> Certainly, and as Tesla’s logs clearly show, much of my driving was at or well below the 65 m.p.h. speed limit, with only a single momentary spike above 80. Most drivers are aware that cars can speed up, even sometimes when cruise control is engaged, on downhill stretches.

Why not just admit that he pushed the car to 80mph? If he bothers giving a really bad excuse for something benign, what's the rest of the article worth?

Re: That Tesla Data: What It Says and What It Doesn’t

#153

Post by pseut »

taproot wrote: post #115
bitcartel wrote: post #22

Earlier quoted context omitted.

Given the ambiguity of what the dash was reporting and what Tesla personnel were telling him, it looks like he put his trust in the humans. In that situation, where you've been led to believe the dash behaves like a wonky gauge, it's quite reasonable to not call back.

Can't say I'd call starting out on a 61 mile journey with 32 miles of charge reasonable.

You might if your only task that day were to assess and report on the current state of charging that car.

Re: That Tesla Data: What It Says and What It Doesn’t

#154

Post by chiph »

Lewisham wrote: post #21
jacquesm wrote: post #3

Two bits are completely non-sensical to me, is there any battery technician or otherwise knowledgeable person that can indicate in what conditions this makes any sense? > Beginning early in the morning of my second day with the car, after the projected range had dropped precipitously while parked overnight, I spoke numerous times with Christina Ra, Tesla’s spokeswoman at the time, and Ted Merendino, a Tesla product p…

> That does not make any sense either. Any kind of consumption will ultimately reduce the available range, you don't restore by removing joules from a pack. I think what is happening is that he thinks the battery actually does have the charge, but the estimate is incorrect because of the cold. What he thinks is going to happen by driving is that the battery will heat up and become more efficient, and the estimated ra…

While the battery does have internal coolant (heat-exchange) loops, it's position on the bottom of the car (it's the entire floorpan) means that it has a large surface area exposed to the weather, and wind-chill would rapidly draw any internal heat away. The question that I don't know the answer to is: how rapidly?

Re: That Tesla Data: What It Says and What It Doesn’t

#155

Post by erichocean »

Anechoic wrote: post #40
blehhhhhh wrote: post #31

google maps/streetview shows the milford stop in detail - take a good look and explain to any reasonable person how can anybody miss the tesla charging station - and then driving half a mile doesn't seem possible...maybe possible if you mistakenly drove into the trucking lane, and had to circle around...maybe 5 times over and over?

take a good look and explain to any reasonable person how can anybody miss the tesla charging station It was dark (5:45pm), on an I-95 rest stop during rush hour. That parking lot was likely jammed with cars and pedestrians moving around, it's perceivable that someone not familiar with the area could miss it (based on my experience trying to find air pumps at various rest stops).

A great opportunity for someone to visit the rest stop at 5:45pm, during rush hour, and put up a YouTube video of the location.

Perhaps it was hard to find. Perhaps it was easy. It'll be obvious with a video, no?

Re: That Tesla Data: What It Says and What It Doesn’t

#156

Post by danielweber »

tomkarlo wrote: post #103
csallen wrote: post #90

Earlier quoted context omitted.

To be fair, battery "conservation" is different than a battery "recharge".

Given that "conservation" in this case is driven by the rate of usage, minus the rate of recovery - the recharge - from the regen brakes, is it really materially different?

Maybe http://en.wikipedia.org/wiki/Energy-efficient_driving#Burn_a... ?

Re: That Tesla Data: What It Says and What It Doesn’t

#157

Post by inopinatus »

stcredzero wrote: post #75
waterlesscloud wrote: post #49

Earlier quoted context omitted.

Agreed. They've allowed Broder to just ride this out by muddying the waters. He walks away from this only slightly tainted now. At the very least, his notes and the resulting article are not accurate. He confirms this himself. This isn't surprising, and not necessarily malicious. But it's extremely common, as anyone who has ever dealt with a journalist knows. As a group, journalists simply get a great number of thing…

> As a group, journalists simply get a great number of things wrong and cannot be relied on for detail oriented work. Something is very wrong here. If the way you conduct business has nearly equal probability of pissing off innocent people unjustly as it has of making wrongdoers hot under the collar, isn't it time to revisit how you do things?

Nonetheless it confirms my experience of journalists also: as a class, they often play fast and loose with the truth and frequently misattribute statements, misinterpret facts and quote misleadingly out of context.

Take everything you read in the press with a huge grain of salt.

Re: That Tesla Data: What It Says and What It Doesn’t

#158

Post by jmount »

kdsudac wrote: post #73
jules wrote: post #5

> I was given battery-conservation advice at that time (turn off the cruise control; alternately slow down and speed up to take advantage of regenerative braking ) that was later contradicted by other Tesla personnel. What the heck? Does this guy seriously think that braking and then speeding up will conserve battery? Maybe the adage "don't attribute to malice what can be explained by stupidity" is true.

Curious. Is this logical: cruise control ==> less (speed up / slow down) ? So: no cruise control ==> more (speed up / slow down) ? Do you believe the Tesla advice was to turn off cruise control to conserve battery? or do you think the times reporter is making that up? Disclaimer: don't know much about Tesla implementation of cruise control.

Cruise control is a more steady speed by applying more power up hills and such.

Re: That Tesla Data: What It Says and What It Doesn’t

#159

Post by foobarian »

recoiledsnake wrote: post #132
jacquesm wrote: post #3

Two bits are completely non-sensical to me, is there any battery technician or otherwise knowledgeable person that can indicate in what conditions this makes any sense? > Beginning early in the morning of my second day with the car, after the projected range had dropped precipitously while parked overnight, I spoke numerous times with Christina Ra, Tesla’s spokeswoman at the time, and Ted Merendino, a Tesla product p…

The major WTF moment for me was this: > I was given battery-conservation advice at that time (turn off the cruise control; alternately slow down and speed up to take advantage of regenerative braking) Someone failed at basic thermodynamics. Converting electricity to mechanical and back to electricity causes a terrible loss in power.

This. That a Tesla customer rep would ever say this seems beyond belief.

Re: That Tesla Data: What It Says and What It Doesn’t

#160

Post by taproot »

pseut wrote: post #153
taproot wrote: post #115

Earlier quoted context omitted.

Can't say I'd call starting out on a 61 mile journey with 32 miles of charge reasonable.

You might if your only task that day were to assess and report on the current state of charging that car.

Assess? That wasn't an assessment, that was FUD.
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