tater Posted February 7 Share Posted February 7 Quote Link to comment Share on other sites More sharing options...
DDE Posted February 7 Share Posted February 7 Sukhoi Superjet avionics are calibrated to a maximum permitted sealevel pressure of 1052 hPa. It was 1054 hPa in St. Petersburg today, so they got grounded. https://www.fontanka.ru/2025/02/07/75083705/ Quote Link to comment Share on other sites More sharing options...
JoeSchmuckatelli Posted February 19 Share Posted February 19 Sailing north out of Nassau, Bahamas I noticed something different about the water. It was a deep, dark almost black blue. My kid asked me why it was so dark and I quipped that meant the water was probably in excess of 6,000 feet deep. Literally just from stuff I picked up by hanging out with Navy types. Turns out I was right. Just north of Nassau is a part of the ocean called "Tongue of the Ocean" that cuts through the plateau that makes up most of the shallow seas that give the Bahamas such beautiful water. And yes - it was about 6,000 feet deep where we were. Not far from there it can get as deep as 13,000 feet deep! !8o The Bahamas FWIW - Nassau is pretty much in the middle of the map in the link above. Map-of-Tongue-of-the-Ocean-Bahamas-star-indicates-deployment-site-with-the.png (850×634) Quote Link to comment Share on other sites More sharing options...
Codraroll Posted February 22 Share Posted February 22 (edited) This is a Craspedacusta sowerbii, or a peach blossom jellyfish. It is a very unusual, freshwater jellyfish. Well, not actually a jellyfish, biologically speaking, but close enough. It is a very small creature, only 20-25 mm in diameter. Like all jellyfish, its body consists mostly of water. If placed in sea water, it would probably die, but the jellyfish's body would contain more water by volume, than the water it was swimming in. A bucket of water with a C. sowerbii in it would probably, on average, be so little polluted that it would pass most regulations for drinking water. It is only a small pinch of material more than water itself. [snip] Edited February 22 by Vanamonde Quote Link to comment Share on other sites More sharing options...
Vanamonde Posted February 22 Share Posted February 22 No politics, please. Some comments removed. Quote Link to comment Share on other sites More sharing options...
DDE Posted February 27 Share Posted February 27 Tomorrow is Public Sleeping Day Quote Link to comment Share on other sites More sharing options...
darthgently Posted February 27 Share Posted February 27 Noice. Science! Quote Link to comment Share on other sites More sharing options...
DDE Posted March 2 Share Posted March 2 On the 6th of December 2014 the French pilot Jean Navarre met a German counterpart above the river Somme. They waved to each other. Then the future Sentinel of Verdun, and possibly the first fighter ace, fetched his carbine and started blasting at his startled opponent. Quote Link to comment Share on other sites More sharing options...
Vanamonde Posted March 2 Share Posted March 2 11 hours ago, DDE said: On the 6th of December 2014 the French pilot Jean Navarre met a German counterpart above the river Somme. They waved to each other. Then the future Sentinel of Verdun, and possibly the first fighter ace, fetched his carbine and started blasting at his startled opponent. Pretty spry for a couple of guys more than 100 years old. Quote Link to comment Share on other sites More sharing options...
magnemoe Posted March 2 Share Posted March 2 59 minutes ago, Vanamonde said: Pretty spry for a couple of guys more than 100 years old. Yes an 100 year bug. Now its a bit interesting that none thought of arming planes designed to be used in an war, but planes was just 11 years old. Balloons was common for artillery spotting as they was established technology and stay up for hours being tethered and with an phone line down. Planes could do deeper recon like spotting build up of forces in the rear indicating an assault. The first real combat missions of planes was taking out the balloons. Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 3 Share Posted March 3 Pettit getting science points to advance up the tech tree Quote Link to comment Share on other sites More sharing options...
DDE Posted March 4 Share Posted March 4 (edited) Alright, this time, no dates... Napoleon's sarcophagus is made from Shoksha quartzite found on the coast of Lake Onega and released by special dispensation of Czar Nikolai I. The material, complete with a sample, was suggested to Louis Visconti in an anonymous letter signed by "an engineer". Nikolai, an unexpected heir to the throne and a military engineer by education, was reportedly very pleased with his brother's arch-nemesis being permanently confined by Russian stone. Edited March 10 by DDE Goofed up on biographical details instead Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 10 Share Posted March 10 Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 12 Share Posted March 12 A New Hope. Familiar names and a groundbreaking fresh approach Quote Link to comment Share on other sites More sharing options...
DDE Posted March 16 Share Posted March 16 The Soviets appeared to have interesting ideas about cargo ramps on aircraft. I think there were doubts whether they could get in the way of a cargo drop, but more importantly, there was a desire to load aircraft off the back of a truck. This led to a rather interesting design heritage. An-12 had no ramp. An-22 and the prototype An-70 had a simple ramp. But on lighter aircraft, Antinov got weird. Here's the three-positional ramp of an An-26. Spoiler As An-72 was its de facto successor, it inherited the mechanism, with the added retractable fairing. A secondary factor was the addition of an overhead crane that was supposed to go as far back as possible. The designers of Il-76 did not abuse the ramp nearly as much, but their cargo hatch is quite complex to accomodate the twin rails of BMD-carrying cranes (originally 4x2.5 t) that extend 5 m beyond the bottom end of the hull. Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 16 Share Posted March 16 Best part is more part. Keep workers busy. But seriously, that overhead crane is cool Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 18 Share Posted March 18 I briefly thought about something like this as a component for some far-fetched hypothetical sci-fi story a few years back. Who can keep up? What a time to be alive! https://news.mit.edu/2025/tiny-tardigrades-protein-may-help-cancer-patients-tolerate-radiation-therapy-0226 Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 20 Share Posted March 20 Fun fact: Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 22 Share Posted March 22 (edited) Nicely done, great little thread [Edit: it should be noted that one of the pics is of the Babbage engine, not this device. ¯\_(ツ)_/¯ ] Edited March 22 by darthgently Quote Link to comment Share on other sites More sharing options...
magnemoe Posted March 22 Share Posted March 22 13 hours ago, darthgently said: Nicely done, great little thread [Edit: it should be noted that one of the pics is of the Babbage engine, not this device. ¯\_(ツ)_/¯ ] Analogue computers are pretty cool, most was however mechanical and / or electric. Very fast for electrical / electronic ones and you can get continuous adjustments. The Iowa class battleships used their analogue computers up until deactivated. They had digital fire control computers but they was not more accurate back in the 80's, but they was cheaper. Analog computers was single task, they needed another computer for shore bombardment since you here usually got target from spotters. For something more generic you could reconfigure them, but accuracy will fall off if you chain them up so say two modules give input to next one who then feeds more down the line. Not so much an issue for an fire control computers as its mostly aggregate lots of inputs. Not so much for machine learning but some has looked that that approach. Saw one back in the 80's and it had been used in the 80's it was some problem who was not practical to do on 80's computers but the analogue had no issues. Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 24 Share Posted March 24 Imagine this in lunar or Martian gravity Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 25 Share Posted March 25 Texas Tea on Mars? Quote Link to comment Share on other sites More sharing options...
darthgently Posted March 25 Share Posted March 25 Physics and control theory. Let me know when Boston Dynamics, Tesla, or the other robotics ventures crack this level. They will, but not soon Quote Link to comment Share on other sites More sharing options...
DDE Posted March 31 Share Posted March 31 Yuri Knorozov, the decryptor of the Maian glyphs, wrote the cat in the photograph as the coauthor of the article "On the matter of classifying signals". This wasn't even a joke - he was analyzing, amongst other things, her meowing to her kittens. Quote Link to comment Share on other sites More sharing options...
JoeSchmuckatelli Posted March 31 Share Posted March 31 3 hours ago, DDE said: photograph Side question: I know most mono cultures smile far less than Americans do - including in photos... Would Russians see the above photo as 'the man seems angry' or 'this is normal photo face'? https://www.theatlantic.com/science/archive/2017/05/why-americans-smile-so-much/524967/ Quote Link to comment Share on other sites More sharing options...
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