8 ms·
Jesus nut
- focom 3y agoWhat would be the equivalent in software engineering? Loosing your domain name?
- smitty1110 3y agoWhen using AWS for anything, pray for the health of us-east-01. When that region has problems the whole internet quakes with fear. You never know what's going to break.
- _ea1k 3y agoI'm shocked at how true this is. A huge amount of software is only redundant by being hosted in mutiple parts of aws us east.
- chinchilla2020 3y agoThat's the funny part. It is spread around 'US East'. If anything catastrophic (or mundane) knocks out power/internet in that region it won't matter how many backups you have. It will bring down large parts of the internet.
- MichaelZuo 3y agoThat seems to indicate a problem with the decision making behind putting important things in only one region.
- rc_mob 3y agoI'm happy if it goes down , nice excuse to not get any work done that day
- trillic 3y agoProd database on a single server with a single drive
- hondo77 3y ago...with no backups.
- readthenotes1 3y agoWithout reliable restores. FIFY
- organsnyder 3y agoWhat part of "with no backups" didn't you understand? :-)
- scubbo 3y agoPerhaps the part where "having backups which are unreliable/unrestorable" is _more_ dangerous than "being known to have no backups", because the former provides a false sense of security?
- MenhirMike 3y ago"Good companies test their backups. Great companies test their restores." Learned that lesson the hard way a few decades ago.
- HeyLaughingBoy 3y agoAnd stored under the developer's desk.
- butlike 3y agowith the power button lined up with where their shoe rests.
- croisillon 3y agoOT: that's how i recognise French people anywhere ;) only one o for "losing"
- bragr 3y agoHuh? That's an idiomatic error typical of native speakers. People who learn English as a second language tend to do much better on the "loose-lose" and "there-their-they're" kinds of errors
- HL33tibCe7 3y agoFor what it's worth, in my experience the GP's comment rings true. I don't see many native English speakers making that mistake, and I do see lots of native French speakers making it.
- bmacho 3y ago> People who learn English as a second language tend to do much better on the "loose-lose" and "there-their-they're" kinds of errors This sounds logical, but I am not sure about it. I certainly make much much more errors based on similar sounding words in English than on my native language. (I believe I make a TON of such errors in English, and almost none in my native language, but hard to tell.)
- taway1237 3y agoI can confirm that as a non native English speaker I don't make this kind of mistake often. I think spelling is easier for me because I first learned how the word is spelled and only later how to actually pronounce it? And i separate homonyms like they're/their in my head because they're very different words in my language.
- KptMarchewa 3y agoIdiomatic error is "would of"
- focom 3y agohaha good catch
- rco8786 3y agoDNS
- turtleyacht 3y agoI hear "bus factor" bandied about. https://en.m.wikipedia.org/wiki/Bus_factor https://en.m.wikipedia.org/wiki/Bus_factor
- barryrandall 3y agoEncrypting your data at rest and losing the key.
- stronglikedan 3y agoJesus Undersea Cable?
- strawhatguy 3y agoAn interesting question, what in software causes catastrophic issues when it's broke, but also designed as it should, like the Jesus nut is for a helicopter? Obviously many systems have a single point of failure, and can result in lost productivity, but is that designed as it should, or cause catastrophic results like a helicopter crash?
- NickNameNick 3y agoLoad balancer? Cluster coordinator? STONITH device
- cp9 3y agoBGP
- deleted 3y ago[deleted]
- gavinhoward 3y agoI briefly trained as a helicopter pilot. We do refer to it as the Jesus nut. Bit of trivia: the bigger danger to helicopters is actually the rotor slowing down too much. If that happens, the rotor will fold. Yes, centrifugal force is the major force keeping rotors in one piece. So lose your engine, and you must slam the collective down to keep rotor speed. (Nit: higher energy rotors give you more time.)
- metadat 3y agoAre you saying the rotors will fold and bend upwards too far due to wind resistance? ASCII diagram (the "o" is the j-nut): | | \.__o__./
- f1shy 3y agoDue to lack of centrifugal force tensioning the blades. Yes, the will fold up like in cartoons.
- the_pwner224 3y agoNeat. Apparently it's called coning. https://en.wikipedia.org/wiki/Coning https://en.wikipedia.org/wiki/Coning > The tips of the rotor blades move faster through the air than the parts of the blades near the hub, so they generate more lift, which pushes the tips of the blades upwards, resulting in a slight cone shape to the rotor disc. This is balanced by centrifugal force. If rotor RPM drops too low, the rotor blades fold up with no chance of recovery. > Rotors are typically designed with washout (twist) so that lift is relatively uniform along the blades. However, because lift increases quadratically with airspeed, coning still occurs at higher RPMs. > Some helicopters such as the Bell UH-1 Iroquois are designed with "pre-coned" blades, which are curved downwards but lay more flat in flight.
- IshKebab 3y ago[flagged]
- 3y ago
- chrisguilbeau 3y agoThe term made it's way into climbing too for building anchors when trad-climbing. (traditional as opposed to sport climbing)
- kevinherron 3y agoHmm, for anchors, or for that first piece (or two) that would keep you off the deck or from falling on the belay anchor?
- fingerlocks 3y agoIt’s the first piece off the belay
- unwind 3y agoI love it! Clearly related to the Jesus handle [1] but way more severe because helicopter. [1]: https://www.urbandictionary.com/define.php?term=jesus%20handle https://www.urbandictionary.com/define.php?term=jesus%20hand...
- strawhatguy 3y agolol! that reminded me, my HS friend, as urban dictionary says, called it the "oh shit handle". Some cars didn't have the handle, so the arm-in-front-on-dash was the "oh fuck brace"... of course, this was before passenger-side airbags everywhere.
- incomplete 3y agoah yes, the 'oh shit handle'. i still call them that!
- havblue 3y agoJust to add, Chickenhawk, as mentioned in tfa, is a great read if you're interested in helicopter flight, Vietnam Huey tactics and Vietnam R&R.
- carabiner 3y agoOnly in some helicopters. More of a trivia term than anything engineers reference. Source: was a helicopter stress analyst for 7 years on military and civil models. https://i.pinimg.com/736x/4a/d0/d6/4ad0d68003a6d213e0a56f9b42b414ad.jpg https://i.pinimg.com/736x/4a/d0/d6/4ad0d68003a6d213e0a56f9b4... - CH-53K, No jesus nut https://www.copters.com/mech/pictures/r22_head.jpg https://www.copters.com/mech/pictures/r22_head.jpg - R22, also none
- Boogie_Man 3y agoIs this a "New v Old" thing or "cheap v expensive" thing? Or is it related to the task the helio is performing?
- carabiner 3y agoMostly new vs. old. I'd guess that it's like Vietnam-era trivia for certain Bell models. I've never heard an engineer say "jesus nut" because it's just not a thing anymore.
- hahajk 3y agoBell 206s, still used today, have retaining bolts. And while I don't know what the engineers call things, pilots certainly do call them Jesus nuts.
- seryoiupfurds 3y agoThat first picture is absolutely fascinating. I knew that helicopters are complex, but wow.
- somat 3y agoI have heard that the rotor head on a ch-53 weighs more than an entire huey(uh-1). update: I was unable to find any evidence for the rotor head story, but while looking I found this page full of -53 trivia and I wanted to share it. https://sikorskyarchives.com/home/sikorsky-product-history/helicopter-innovation-era/sikorsky-s-65/ https://sikorskyarchives.com/home/sikorsky-product-history/h...
- sethammons 3y agoReminded me of the Jesus Clip. > The term "Jesus clip" is a comical reference given to it due to its tendency to come loose and launch itself at high speed while removing or installing it, often leading to the remark "Oh Jesus, where did it go?" https://en.wikipedia.org/wiki/Circlip https://en.wikipedia.org/wiki/Circlip
- jprd 3y agoso. many. times.
- donatj 3y agoThis is what I was expecting when I clicked on the link. They really seem to almost always shoot off, especially if you don't have the special tool.
- RachelF 3y agoSome hang gliders have a Jesus clip at the top, holding all the wire wing struts to the frame. Old kite surfers had a Jesus rope, that you pulled to collapse the canopy and stop you flying away in a gust.
- sturza 3y agoThe related slang term Jesus pin refers to the lock pin used to secure the retaining nut. More generally, Jesus nut (or Jesus pin) has been used to refer to any component that is a single point of failure which results in catastrophic consequences, and the only thing left to do is, metaphorically speaking, pray to Jesus, hence the name.
- dang 3y ago[stub for offtopicness]
- mayowaxcvi 3y agoIsn’t that the shortest sentence in the bible or something?
- billjings 3y agoI am so sorry, I have to flag this because seriously, but also Amazing joke, I lol'd, fantastic work sir
- hotnfresh 3y agoClose, shortest verse is: “Jesus wept”. Famous among kids who once attended Sunday school programs that asked them to recite a bible verse each Sunday. First kid to go always takes that one.
- lapetitejort 3y agoPerhaps in an apocryphal book, or the novelization of The Last Temptation of Christ
- deleted 3y ago[deleted]
- fatfox 3y agoamen to that!
- tpmx 3y agoIs there a single major redundant aspect in a (single-rotor) helicopter's ability to stay airborne? I thought helicopters were so expensive because every part had to work and last, or else.
- minitoar 3y agoI guess it depends on what you mean by "major". Pumps, injectors, spark plugs, etc tend to be redundant. You have airspeed & altitude. None of this is really specific to rotorcraft, though.
- JoeyBananas 3y ago> I thought helicopters were so expensive because every part had to work and last, or else. Yes, but the key to why helicopters are expensive is that is that aviation is highly regulated by the government. Individual manufacturers, pilots, airlines, etc. don't get to decide what is "safe enough," they have to obey the standards set by the law. Adhering to the standards of the law requires a lot of process and paperwork.
- salawat 3y ago...737 MAX begs to differ. Just gaslight the regulator and produce the best selling airframe of all time.
- pryelluw 3y agoNot to be confused with “Jesus Code”. Jesus code is any code written in a way that only the author and god (Jesus) would know how it works. That is until inevitably the author forgets. Leaving Jesus as the only source of reference. It is believed that Jesus Code is the reason the second coming of Christ has not yet occurred. As Jesus would be flooded with support requests, jira tickets, and zoom meetings. (Some people believe the modern SDLC to be the devil’s way of keeping Jesus from coming.)
- partiallypro 3y agoWhen I was younger, I helped sell small Robinson helicopters, etc like the R22, R44. Saw some getting assembled for sale, honestly hard to believe some people have so much trust in not only the Jesus Nut but in the people putting smaller personal aircraft together.
- Perenti 3y agoWhen I was younger and rode motorcycles with my friends, we cast derision on the new trend of "Jesus Box" design, where any electrical issue meant buying a new, expensive black box that only Jesus could fix. No one with self respect would buy one, what if something failed out bush? A decade later we all realised that the new bikes were insanely reliable, and never had random electrical issues in the rain.
- geocrasher 3y agoWhen I was learning to work in HP Laserjet IIP and IIIE (and 4SI) printers (I'm old...) I was taught that those little circlips that hold things were called "jesus clips" because they fly off into the nothing, never to be seen again, and the guy working on it usually yells out "JESUS!" in frustration. But the helicopter thing makes sense too.
- ketzo 3y agoThe Wikipedia article actually has a mention of that too, in regards to a pin on a tank machine gun. I’ve personally heard of a tiny device called the “fuck wrench”…
- demondemidi 3y agoI learned that fixing bicycles.
- implements 3y agoIirc, mechanical watch repairers have a type of putty they can lay across sprung components likely to fly off never to be seen again … Yeah: https://www.amazon.co.uk/BERGEON-Bergeon-Professional-Cleaning-Rodico/dp/B008YMGYBU https://www.amazon.co.uk/BERGEON-Bergeon-Professional-Cleani...
- sacnoradhq 3y agoIt's surprising most rotor mast designs don't include a nested secondary nut and don't use lockwire. In Japan, motorcycle racing requires lockwire on almost everything. It's a shame helicopter safety engineering generally doesn't meet this basic standard. Although, in fairness, relying on a single spinny thing without an all operational envelope survival passive glide capability is itself inherently dangerous.
- dtgriscom 3y ago... maybe because lockwire wouldn't help in this situation?
- MarkMarine 3y agoThe Jesus nut on a Huey and a cobra both include a secondary lock (looked like a single gear tooth) secured by a bolt and lock wire. The nut was torqued to 3000 ft-lb so this was kind of superfluous. But it does show that the nut was torqued, witnessed, and wired.
- bityard 3y agoLiterally the second sentence says that the the Jesus nut is secured by a retaining pin.
- wrs 3y agoAt a previous job we installed a pair of SD-WAN appliances that supposedly had high availability built in. Except there weren’t enough Ethernet ports on the appliance, so both the WAN connections had to go through a single switch. Of course we referred to it as the “Jesus switch”.
- romusha 3y agoWhat about Jesus Christ?