SEJeff

35 ms·

421.
by SEJeff 5y ago
Tesla is going to start shipping their Semi next year. I think you’re gonna lose that bet as I’m pretty sure a Semi is a tad bigger than a family vehicle. Granted, they’re developing a new “mega charger” for it, but still. The higher torque
422.
by SEJeff 5y ago
Elon mentioned it at their “battery day” event and everyone sort of laughed about it.
423.
by SEJeff 5y ago
Improving the cost of lithium extraction, if this can be scaled up, is actually a really big deal for electric vehicles. The single largest cost of a modern EV is the battery. Tesla thinks this process reduces the cost of lithium extraction
424.
by SEJeff 5y ago
Electrek is a glorified Tesla fanboi (Fredrick Lambert) blog which often skews reality. I'd never put "better source" and Electrek in the same sentence. I'm saying this as a Tesla owner mind you!
425.
by SEJeff 5y ago
Reading for people not aware of it: https://developer.mozilla.org/en-US/docs/Web/Security/Subres...
426.
by SEJeff 5y ago
Ok. Why has no one done it? The economics would surely be there if someone could. Seemingly, SpaceX is the current best in the world and they couldn’t do it.
427.
by SEJeff 5y ago
https://www.theatlantic.com/ideas/archive/2021/05/china-pape...
428.
by SEJeff 5y ago
They’re planning on dumping the first few super heavy boosters in the ocean. This is in the authorizations from the FAA.
429.
by SEJeff 5y ago
If you’re referring to the Falcon Heavy side booster landings, I got to see the first one live at Kennedy Space Center. It was one of the only things in my entire life I’d describe as pure magic. It was amazing and so beautiful to see.
430.
by SEJeff 5y ago
Oh very good point. The GP’s $1 million number per falcon 9 launch was ludicrous.
431.
by SEJeff 5y ago
The Falcon 9 can not be launched for less than $1M. Falcon 9 does not reuse the second stage. Elon has said that the second stage is approximately 20% of the cost of a Falcon 9 launch. A Falcon 9 needs to have some work done between each la
432.
by SEJeff 5y ago
And if/when SpaceX finishes Starship plus Superheavy, SpaceX will be launching up to 400 satellites per launch. Also, they've submitted authorization for up to 42,000 total starlink satellites: https://spacenews.com&#x2
433.
by SEJeff 5y ago
No. This wouldn't happen as space is much bigger and there are far more airplanes today in the sky than satellites with a higher more distant apart orbit. These low earth orbit constellations will naturally experience orbital decay and
434.
by SEJeff 5y ago
> The type of democracy practised in Athens was pretty widespread amongst various city-states (including non Greek ones like Rome, which arguable had a form of "democracy" much closer to the modern one because in Athens most pu
435.
by SEJeff 5y ago
Democracy as an idea and form of government was almost extinguished from history by the Persians. When Emperor Xerxes II invaded Greece to avenge the Greeks beating his father Darius it looked really bad. After the Persians put a pretty bad
436.
by SEJeff 5y ago
Building materials all went through the roof. They’ve not came back down and hvac hardware followed suit. https://www.constructiondive.com/news/skyrocketing-steel-lum... https://www.benningtonbanner.com&#x2F
437.
by SEJeff 5y ago
Full buildout, cutting holes and running ductwork, etc. Thats the quote for materials and labor, yes. If I did it a year ago it would be 20k less :/
438.
by SEJeff 5y ago
I've got a looooot of solar panels, so the electricity is "effectively" free. This is good advice though, thanks!
439.
by SEJeff 5y ago
It is 4 zones with (effectively) 5 floors and a lot of square footage. Anderson gave us a great deal on high efficiency triple pane argon gas filled windows and I walked the home with a wireless thermometer to check for obvious insulation p
440.
by SEJeff 5y ago
I basically followed your advice and ran far away. That's why I'm getting Central HVAC, which I'm sad about as I like the idea of Geothermal, but it is what it is.
441.
by SEJeff 5y ago
By "hit rock" I mean the 3 hvac firms I spoke with didn't want to dig through rock, but couldn't nail down a cost if they hit it, which is basically a certainty. Bosch as a general rule has pretty solid engineering. I&#x
442.
by SEJeff 5y ago
Unfortunately, due to the topology, it wouldn't be very viable. I don't want to cut down the hardwood (white oak, maple, walnut, and cherry) forest around the home just to install hvac when there are alternative options. The real
443.
by SEJeff 5y ago
~6,500sqft / 4 stories with a basement. The price a year ago would have been more like 20k, but with the crazy price of lumber and all building materials going up, the HVAC companies followed suit :(
444.
by SEJeff 5y ago
Not sure if you were aware, but the cost of building materials such as wood and also hvac has went up massively. The same central heating and air units a year ago would have cost maybe 20k with a full install. We got three quotes for three
445.
by SEJeff 5y ago
I just priced out HVAC for a large home in central KY. It worked out to 3 of the highest efficiency American Standard/Trane units (Central Heating and Air) for around 50k or a touch over 70k for Bosch Geothermal. The big caveat for geo
446.
by SEJeff 5y ago
Agreed! We sent that to them as a feature request and I believe it is now on their roadmap.
447.
by SEJeff 5y ago
It is like being a Haskell developer (monads all the way down) or emacs/vim user.
448.
by SEJeff 5y ago
For certain use cases, it is not cost prohibitive. Take defense or banking…
449.
by SEJeff 5y ago
I’ve been in meetings where executives have said precisely this and I have tried to gently nudge them towards defense in depth.
450.
by SEJeff 5y ago
Yes, Google tries to abstract SEV from you, but it is SEV-SNP that we really need for this. Our account manager confirmed they’re not offering SEV-SNP yet. But you know this for metropolis, right? :)

More ›