Thinking about the elevator in our commie block, it would have given a heart attack to a western European. Instead of having double doors to keep us safe from the moving wall, it had pads on the bottom and top edge so if your hand or leg is stuck, the pad will be pushed and the elevator will stop immediately. Also there was a tiny cabinet door on the right side so you can access the mechanism to force open the door or force move/halt the elevator. As kids, we would be experimenting with those mechanisms. They worked every single time, no legs or arms were lost.
Neah, paternoster is quite a common elevator design in the west: https://en.wikipedia.org/wiki/Paternoster_lift
I would have thought the name was related to the users praying before entering to increase their chances of surviving the ordeal.
The reason even its proponents accept you wouldn't build these now is that they have terrible accessibility, so they're only practical as an extra option.
i have used one at the university of vienna. sadly it was removed almost 20 years ago.
Their overall rate of accidents is estimated as 30 times higher than conventional elevators
Germany saw an average of one death per year due to paternosters
and now it looks like it might just survive anyways. but then according to the article there also seems to be a second (identical?) model. so maybe it's not that important, except for maybe material analysis what does 50 years of exposure to space do to the material.
https://en.m.wikipedia.org/wiki/Hubble_Space_Telescope#Servi...
https://en.wikipedia.org/wiki/STS-32 brought back the Long Duration Exposure Facility experiment, a bigass science probe the size of a small school bus.
There are still missions that are classified that could have done so as well.
It was something the shuttle was designed to do, with the 60-foot cargo bay requirement and the ability to bring back the mass it flew with coming specifically from the military.
That's very interesting. First time I heard about it. Thanks for the reference!
Tighten down some ratchet straps, wiggle it a bit and say, 'that'll hold it'
https://en.wikipedia.org/wiki/Trap%E2%80%93neuter%E2%80%93re...
And Soviets were wondering why their satellite numbers were not growing...
SpaceX's Dragon 2 easily has enough cargo capacity to bring it down (~3 tons vs 0.5 ton), but there's still the question of intercepting, capturing, and securing it in Dragon's cargo bay. That would still cost something north of $100m to recover the lander.
The lander would easily fit into the unpressurized cargo bay (the "trunk"), that is typically used to launch various vacuum-bound payloads alongside pressurized cargo inside the capsule. However, for a return from orbit, the trunk cannot be used - it is not protected by a heat shield, and is ejected before re-entry.
You are correct that the return payload mass of a Dragon would technically allow it. But you'd need to somehow get the captured object _inside_ the capsule, which may be possible via the EVA front hatch for something smaller, but not 1m in diameter like the Venera lander.
Starship should be able to do it, since it is fully protected by heat shielding and returns in one piece, not ejecting any modules in orbit. But that's quite a while from being operational yet.
Even the Space Shuttle wasn't necessarily a perfect fit for the job as-is. Hubble was serviced many times, but it was specifically designed for on-orbit capture and servicing by the Shuttle. Before they decommissioned the shuttle they actually had to install an extra piece of hardware to make it feasible to capture and de-orbit using future non-crewed spacecraft. And even then that's just to make sure it crashes in a safe place, not to bring it home intact.
There was also a mission to service a satellite that wasn't designed for the purpose, and they had a really hard time capturing it and very nearly had to give up after days' worth of failed attempts. It finally took simultaneous EVA by three astronauts to coordinate a successful capture (one to grab it by hand, two to get it onto a specialized adapter rig built just for that satellite so that the Canadarm could hold it), which is quite a thing considering that the Shuttle's only designed to allow two people on EVA at a time.
This craft is likely tumbling, which I presume would make it unacceptably dangerous for a crewed mission (and certainly rules out anyone just going out there and grabbing it with their hands), in addition to making successful capture that much more difficult.
If you know Elite, it has space stations where you dock by going inside, while matching station's rotation. That's only in one axis (and note the hangar goes through the axis of rotation, i.e. centre of mass). To add rotation around another axis would make the task impossible.
Wikipedia talks of "chaotic rotation" of astronomical objects, but only over long timescales due to gravitational interactions and thermal effects. On short timescales, its axis shouldn't change much at all, unless you bump into it and apply an off-axis torque.
[0] https://en.wikipedia.org/wiki/Precession#Torque-free_or_torq...
https://rotations.berkeley.edu/a-tumbling-t-handle-in-space/
https://rammb.cira.colostate.edu/dev/hillger/Shuttle-related...
When I worked "on Mars" there was a "flight spare" copy of a Viking instrument which was the predecessor to the one we were working on, and of course it was encased in Plexiglas as a museum piece, but it was truly a redundant copy, as NASA was into copying everything they sent into space, (what was the saying in Contact? "Why have only one, when you can buy two at twice the price?") so that if anything needed to be tweaked, or went wrong, they would have this copy on the ground that they could experiment with to their hearts' content.
National existential crisis? They'd probably take Dragon and figure out how to make it work.
I don't know what value can it have to be studied since it never left low earth orbit (albeit it was there since 1972), but I know it would be a cool addition to any museum that may host it.
But at this point none of the remaining shuttles are in an operational state.
Maybe you are thinking of the X-37 which is operated by the space force?
> The Venera 14 craft had the misfortune of ejecting the camera lens cap directly under the surface compressibility tester arm, and returned information for the compressibility of the lens cap rather than the surface.
The discrepancy between calculated and measured position, resulting in the discrepancy between desired and actual orbit insertion altitude, had been noticed earlier by at least two navigators, whose concerns were dismissed because they "did not follow the rules about filling out [the] form to document their concerns"
Typical bureaucratic BS. Not surprised; what's surprising is that anything works in that sort of environment.
https://www.youtube.com/watch?v=kuYDkVRyMkg
The whole videos series of JPL and the Space Age is very enjoyable to watch.
https://www.youtube.com/playlist?list=PLTiv_XWHnOZqFnWQs393R...
So, yes, a good teacher could inspire 10+ others to make spacecraft, tech startups, etc. Maybe the ROI for humanity is greater if that teacher stayed as an IC in their field.
I tend to reject any narrative about the Soviets which makes them not sound like humans. They weren't all idiots or sociopaths: they understood, just like we do, that people make mistakes and that if you punish mistakes too harshly, people won't want to risk working with you. The Soviet government punished dissent harshly--but if you were working with them they weren't typically so foolish as to punish honest mistakes with a stay in the gulags. In fact, technical fields like their space program (and, for example, infrastructure programs) were safe havens for intelligentsia, where some criticism of government was tolerated because it was understood that criticism from people with technical knowhow was necessary to progress Soviet goals.
There are exceptions I've found, but I tend to think those are the result of a few people with too much power making bad decisions, rather than a pervasive cultural norm.
None of this should be perceived as a defense of Soviet totalitarianism. Stalin has the highest body count of any dictator by a wide margin, and that's totally reprehensible. All I'm saying is I think he killed political dissenters, mostly, not allies who made mistakes.
He executed and imprisoned a bunch of his best aircraft designers. Look what he did to Andrei Tupolev and his design bureau; they designed a whole aircraft in the Gulag: https://vvsairwar.com/2016/10/20/aviation-design-in-the-gula...
[1] https://en.m.wikipedia.org/wiki/Year_Zero_(political_notion)
The Soviets wanted to increase agricultural yield, but the policies Stalin implemented caused the harvest in 1932 to fall by about 20%. In a country already just barely able to feed itself, that led to famine, not just in Ukraine but across the USSR.
E.g. movie Tenet starts from depicting a scene from "Russian life": under a low sun, in freezing cold, dirty hungry Russians are crawling in the dirt gathering "pieces of Uranium" with their bare hands.
Or you can open just about any publication/movie about Russia/Soviet Union from just about any period of time: there would be not a single good word. Western Media almost never publishes something like: "There's a new school/hospital/stadium/factory opened in Russia". Instead all you can see is "Russian corrupt government officials set a record of eating 100500 babies alive today.", "Weak Russian economy means that Russians will survive on a diet of two rotten potatoes a day in 2026", etc. etc.
It's just that Soviet period is demonized the most.
Would you blame them? Who cares is something good happens now in Russia while they are brutally murdering their neighbors?
Nobody cares whether Hitler was great at drawing or not.
https://theconversation.com/why-vladimir-putin-still-has-wid...
This isn't just oppressed society afraid to act. This is actual support for the actual killer of the babies. Despicable.
Some of it is also caused by the pervasive hostility to the values important to most humans, pervasive disinformation efforts, and aim to destroy the peace and integrity of the countries it perceives as a competition.
For now I'll just agree this is largely deserved, and I'll play the sad tune on the tiny violin.
Basically nobody in the west has any idea, and people always assume I was in a hell hole the entire time. It’s wild what propaganda will do for knowledge of a place.
Sergei Korolev, a famous Russian rocket designer (who was later responsible for launching a first satellite and first human space flight), had to go through the prison and labour camp. In 1938 he was head of a laboratory for jet propulsion (mainly for development of weapon), and as jet engines were not well studied, experimental models often failed with explosions. After another failed test, several laboratory employees were arrested, and after they testified, Korolev. They were charged with sabotage - creating a secret anti-Soviet organization with the purpose of weakening Soviet defence. After series of interrogations, during which he had his jaw broken, he admitted the guilt and soon was sentenced to 10 years of work in labour camps [1]. The sentence was later reviewed and he was transferred to a prison where he was allowed to continue working on jet propulsion.
Another example is Andrey Tupolev - Soviet aircraft designer ("Tu" series of planes is named after him). He was also charged with sabotage (conspiracy to slow down aircraft development in USSR) and espionage during Stalin times and had to design his planes in a prison [2].
After Stalin death, both Korolev and Tupolev cases were reviewed and they were admitted not guilty.
[1] https://en.wikipedia.org/wiki/Sergei_Korolev#Imprisonment
It was worse than that. He was beaten with rubber hose and wire harnesses, had needles pressed in the body, was urinated on. He then was sent to a gulag where he was left dying from hunger and scurvy. He was saved by a fellow imprisoned engineer who was fortunate to fight his way up though the inmate hierarchy.
The broken jaw, out of the many broken bones in his body is mostly mentioned because it was ultimately the cause of his death in 1960s.
> Space law required that the space junk be returned to its national owner, but the Soviets denied knowledge or ownership of the satellite.[8] Ownership therefore fell to the farmer upon whose property the satellite fell. The pieces were thoroughly analyzed by New Zealand scientists which determined that they were Soviet in origin because of manufacturing marks and the high-tech welding of the titanium. The scientists concluded that they were probably gas pressure vessels of a kind used in the launching rocket for a satellite or space vehicle and had decayed in the atmosphere.[9]
I wonder how space law works when the national owner (CCCP) no longer exists? Does it go to Russia? Kazakhstan?
> In an interview with Nezavisimaya Gazeta on 1 April 1992, Foreign Minister Andrei Kozyrev explained the situation: “Many people think that Russia became the legal successor of the USSR automatically, but this is far from being the case. We faced a very difficult political and diplomatic task. Russia is not a legal successor, but a continuing state of the USSR.
> There was no automaticity. It was an open question. The solution was suggested to us by Western countries, especially by the British, who had a huge experience in solving inheritance issues, they had an empire. The British dug somewhere in their archives and proposed a variant of a successor state. There is a monstrous confusion even among historians who write about it and political analysts. It is simply an unwillingness to understand. So, all of them are legal successors. All Union republics. The three Baltic republics refused to be successors. All the others, Georgia, Armenia, Kazakhstan were legal successors and now remain legal successors. In relation to foreign debt, it was a deal. With respect to the UN Security Council, an international conference of all successors under international law had to be convened to resolve the issues. Therefore, a continuator was invented. A continuator is one of the inheritors, one of the legal successors, whom everybody recognises, but it doesn't require ratification. It is simply a declaration that it is recognised as a continuing state of the legal function that is written in the UN Charter for the USSR and now for Russia.
https://en.wikipedia.org/wiki/Succession,_continuity_and_leg...
UN Security Council seat: yes, of course! What an ignorant question.
Responsible for the damage done by the USSR in other countries: certainly not! How dare you!
> Its landing module, which weighs 495 kilograms (1,091 lb), is highly likely to reach the surface of Earth in one piece as it was designed to withstand 300 G's of acceleration and 100 atmospheres of pressure.
Awesome! I don't know how you can design for 300 G's of acceleration!
If acceleration can be negative, so can speed. A negative speed with negative acceleration would not imply deceleration?
If you measure the same object's velocity from a spaceship traveling through the solar system, you'll get a different answer from what we measure from Earth.
That's why physics doesn't distinguish between acceleration and deceleration. What looks like acceleration in one frame looks like deceleration in a different frame.
And if you say “well one way I fly to the back of the tram and the other the front” You’re arbitrarily associating “front” with decelerate and “back” with accelerate.
300gs is 300gs regardless of the direction vector of the component.
> So for sure a system's design must consider more than just the magnitude of acceleration.
What else would you need to consider? Acceleration up? Down? Left? 20%x,30%y,40%z? There’s an infinite number of directions.
Deceleration is a useful but non-technical term, like vegetable. A tomato is a fruit which is a tightly defined concept, but it is in this loose category of things called vegetables. It's still useful to be able to call it a vegetable.
From a physics perspective all changes in motion (direction and magnitude) are acceleration, and it's correct to say the designers had to consider acceleration in most (all?) directions when designing the tram. This is including gravity's, as they tend to give you seats to sit on, rather than velcro panels and straps like on space ships.
It is useful to say to your friend in the pub that you got thrown out of your seat due to the tram's heavy deceleration, rather than give a precise vector.
It's not like you can tell whether you're going slow or fast, in one direction, the other direction, or even just standing still, if you close your eyes.
Aerospace is awesome.
For well under a second though, typically artillery muzzle velocity is, what, two to three thousand feet a second?
Still, it’s wild that guidance electronics and control mechanisms can survive that sort of acceleration.
Isn't that more like 9g?
- barrel length (x): 5.08 meters
- muzzle velocity (v): 827 m/s
Assuming a constant acceleration γ, x = γ * t² / 2 and v = γ * t
Hence:
- t = 2 * x / v = 12.29 ms
- γ = v / t = 67316 m / s² = 7000 G
A bit lower than 9000 G, but in the same ballpark.
Certain rounds, like Excalibur (https://en.wikipedia.org/wiki/M982_Excalibur) or BONUS (https://en.wikipedia.org/wiki/Bofors/Nexter_Bonus), are sophisticated and are able to cope with such accelerations.
It sounds about the same as if I used something like "Joe" to refer to a William.
If you want to troll Putin, call him Vovochka.
I wonder if the producers of that show knew about that failed mission, and that this was actually really in earth orbit, when they wrote that episode.
Starting to get to the range where a timezone would be helpful!
Via Wikipedia², which will probably also get updated fast, this page says they'll stay updated with the latest estimate: https://sattrackcam.blogspot.com/2025/04/kosmos-842-descent-...
¹ https://www.space.com/space-exploration/launches-spacecraft/...
Why would this be? Is the solar wind strong enough to affect the velocity of a dense object such as this?
The Moscow military parade is meant to demonstrate the neo-imperial Russian military might, on the 80th anniversary of the USSR conquering half of Europe. That's the way it is presented, with slogans like «Можем повторить» i.e. “We can repeat it”.
The former striking the latter would be a bit like a terrorist accidentally blowing up on a bomb of their own making.
Weird way to say defeating the Nazis despite millions in losses.
So it would be ironic if glorious past reached through the space to hit those who idolizes it, because they idolize not the historical past but the alternate history past. Reality strikes back.
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There was also a bona fide telephone booth in there, in wood and glass, and I absolutely went nuts, actually needing to place a phone call. But I couldn't quite figure out whether it would open and admit me, or if customers were supposed to be fiddling with it at all, or whether it was only a showpiece. So that exploration will wait until the next time I drop by.