Not 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.)
I 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.)
But don't slam the cyclic down too quickly, otherwise you'll get a "mast bump"... which is a nice way of saying "the main rotor just cut the helicopter's tail in half". This also doesn't end well.
(Though it does note that this scenario doesn't apply to an autorotation entry on engine loss, so I suppose you're okay in this example. Still terrifying though!)
I have a good friend who used to be an instructor, mechanic, and pilot. He was type rated in a ton of things, but refused to fly Robinson helicopters, ever.
Edit/Append: He explained because the rotor turns the opposite direction of most of the other helicopters he flew, his instincts would get him killed.
All aircraft in the US have a manufacturer-decided, and FAA-approved max amount of time between overhauls, and such overhauls are so thorough as to make the aircraft new again. (Sometimes, they even change enough things that the aircraft has to go through airworthiness tests again.)
These overhauls would definitely replace the Jesus nut if there's any hint of problems.
Not a jesus nut failure, but some versions of the Super Puma had a gearbox failure mode that caused several accidents with rotor separation from the helicopter. For example this one that led to grounding of the EC225 and several related models:
> 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?"
Only 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.
Mostly 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.
When 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.
lol! 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.
When 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.
Readit News
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.)
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.)
Good ol' Robinson Safety Notice SN-11:
https://robinsonheli.com/wp-content/uploads/2015/12/rhc_sn11...
(Though it does note that this scenario doesn't apply to an autorotation entry on engine loss, so I suppose you're okay in this example. Still terrifying though!)
Edit/Append: He explained because the rotor turns the opposite direction of most of the other helicopters he flew, his instincts would get him killed.
ASCII diagram (the "o" is the j-nut):
All aircraft in the US have a manufacturer-decided, and FAA-approved max amount of time between overhauls, and such overhauls are so thorough as to make the aircraft new again. (Sometimes, they even change enough things that the aircraft has to go through airworthiness tests again.)
These overhauls would definitely replace the Jesus nut if there's any hint of problems.
https://en.wikipedia.org/wiki/CHC_Helikopter_Service_Flight_...
Dead Comment
> 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
Old kite surfers had a Jesus rope, that you pulled to collapse the canopy and stop you flying away in a gust.
https://i.pinimg.com/736x/4a/d0/d6/4ad0d68003a6d213e0a56f9b4... - CH-53K, No jesus nut
https://www.copters.com/mech/pictures/r22_head.jpg - R22, also none
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/h...
A decade later we all realised that the new bikes were insanely reliable, and never had random electrical issues in the rain.
[1]: https://www.urbandictionary.com/define.php?term=jesus%20hand...
But the helicopter thing makes sense too.
I’ve personally heard of a tiny device called the “fuck wrench”…
Yeah: https://www.amazon.co.uk/BERGEON-Bergeon-Professional-Cleani...