cat_prophecy
cat_prophecy t1_j8odj1e wrote
Reply to comment by [deleted] in NASA's "evolved structures" radically reduce weight – and waiting by Maxcactus
What's the difference in QC testing these parts vs. QC testing literally any other Aerospace part? When I worked in GA, the people doing welding needed to have their welds all x-rayed, magnafluxed, or whatever. Certainly there are ways of finding and addressing porosity or voids in a 3d printed part.
cat_prophecy t1_j1qyiid wrote
Reply to comment by Sometimes_Stutters in LPT: If driving in a snowstorm and your GPS suggests taking a faster route, don’t do it if it takes you off the Highway. Backroads are usually last to be cleared of snow and you could get stuck! by Bradiator34
Also it’s much safer to be going slow, and not being able to go faster than going fast and not being able to slow down.
cat_prophecy t1_j0x0zp9 wrote
Reply to comment by jscannicchio in Epic Games to Pay $520 Million Over Children’s Privacy and Trickery Charges by 08830
They’re unregulated because the majority of lawmakers are still thinking that kids spend too much time on that newfangled Atari.
The average age of senators is in the sixties. 30 years ago, when they were first joining politics, video games were still very much for children and slim few have ever worked past that.
cat_prophecy t1_ixna0pc wrote
Reply to comment by BukkakedFrankenstein in This mining tractor developed by Caterpillar is completely battery-operated by redhatGizmo
It’s less about that and more about cost savings. Fuel costs on average for an ultra class truck are about $175/he using wholesale fuel prices. These trucks run like 18 hours a day.
cat_prophecy t1_ixn9gfv wrote
Reply to comment by dannoGB68 in This mining tractor developed by Caterpillar is completely battery-operated by redhatGizmo
The weight reduction just from not having engine oil and fuel is significant.
A Komatsu 960E carries about 5 tons of fuel (1400 gallons) and nearly half a ton of oil and lubricants.
cat_prophecy t1_ixn8gth wrote
Reply to comment by IvorTheEngine in This mining tractor developed by Caterpillar is completely battery-operated by redhatGizmo
Forklift batteries are also lead-acid and heavy on purpose as they’re used for the counterweight.
The minimum energy density of a LiOn battery is 28% higher than lead acid and that would be using old obsolete packs. For modern packs it’s about 200-300 times higher.
cat_prophecy t1_ixn5fj6 wrote
Reply to comment by chandleya in This mining tractor developed by Caterpillar is completely battery-operated by redhatGizmo
Regenerative braking in a Prius is different from what you find on a battery electric car. They run the motor in reverse as a generator and the electric motors in a battery vehicle are much larger and more efficient than what’s available even in a PHEV.
BEVs can brake without touching the brake pedal. A Prius doesn’t have a large enough electric motor to do that.
cat_prophecy t1_jc8zli2 wrote
Reply to Cemetery staff take out personal ad for goose whose mate died — and find her a new match by citytiger
Randy’s response has to be the most midwestern ever: “Well, that’ll be great”.