Ask Lemmy
A Fediverse community for open-ended, thought provoking questions
Rules: (interactive)
1) Be nice and; have fun
Doxxing, trolling, sealioning, racism, and toxicity are not welcomed in AskLemmy. Remember what your mother said: if you can't say something nice, don't say anything at all. In addition, the site-wide Lemmy.world terms of service also apply here. Please familiarize yourself with them
2) All posts must end with a '?'
This is sort of like Jeopardy. Please phrase all post titles in the form of a proper question ending with ?
3) No spam
Please do not flood the community with nonsense. Actual suspected spammers will be banned on site. No astroturfing.
4) NSFW is okay, within reason
Just remember to tag posts with either a content warning or a [NSFW] tag. Overtly sexual posts are not allowed, please direct them to either [email protected] or [email protected].
NSFW comments should be restricted to posts tagged [NSFW].
5) This is not a support community.
It is not a place for 'how do I?', type questions.
If you have any questions regarding the site itself or would like to report a community, please direct them to Lemmy.world Support or email [email protected]. For other questions check our partnered communities list, or use the search function.
6) No US Politics.
Please don't post about current US Politics. If you need to do this, try [email protected] or [email protected]
Reminder: The terms of service apply here too.
Partnered Communities:
Logo design credit goes to: tubbadu
view the rest of the comments
Any mechanical regulation process that used to be handled by actual machine parts. Think of the centrifugal governor, this beautiful and elegant mechanical device just for regulating the speed of a steam engine. Sure, a computer chip could do it a lot better today, and we're not even building steam engines quite like those anymore. But still, mechanically controlled things are just genuinely a lot cooler.
Or hell, even for computing, take a look at the elaborate mechanical computers that were used to calculate firing solutions on old battleships. Again, silicon computers perform objectively better in nearly every way, but there's something objectively cool about solving an set of equations on an elaborate arrangement of clockwork.
The idea of punch card programming blows my mind.
He's not talking about punch card programming, that's way more advanced and requires a Turing machine, what he's talking about is computers as the term was using before what you would think as a computer existed.
The example in the video is for the computer on a cannon in a battleship. If there wasn't a computer you would need to adjust the angle and height of the cannon, but that's not something a human can know, what humans can know is angle to the ship and the distance to it, so instead you put two inputs where a human inputs that and you translate that into angle/height. Now those two would be very straightforward, essentially you just rename the height crank to distance. But this computer is a lot more complex, because wind, speed, etc can affect the shoot, so you have cranks for all of that, and internally they combine into a final output of angle/height to the cannon.
That's cool, but punch card programming blows my mind.
To add, there is something about those old 40s and 50s era technical films like you linked that is just so... I don't what exactly it is, but I find them fascinating and genuinely informative, even though they are explaining tech that is decades obsolete.
It's pretty awesome that they are still available 70+ years later in excellent quality!
Someone showed me a record turntable with what must have been a centrifugal governor! What an ingenious device. (I got the impression from him this was unusual for a turntable, at least...)
I was under the impression that all wind-up turntables (I.e.: from the shellac records and steel needles and mechanical reproducers era) were using mechanical governors
Maybe I'm wrong though.
Oh I know little to nothing about turntables, so you're probably right :-)
H model C-130s, the ones with the 4 square blade props? The engines and props are mechanically governed. There are electronic corrections applied, but the core of the systems are purely mechanical. Still flying.
Source: former flight engineer on them.
Centrifugal governors are possibly one of the origins of the phrase "balls out" or "balls to the wall" (although many say "balls to the wall" has to do with the ball-shaped handles on old aircraft throttle levers)
Also somewhat similar to governors are centrifugal switches, which are used in just about anything with an electric motor to disconnect the motor from a capacitor which gives the motor a little extra juice to get it going (I like this video for an explanation of how they work)
I didn't know that was a thing. Thanks! I'm honestly surprised some MBA bean counter hasn't replaced those with a chip of some sort by now. Really cool!