|
That double-threaded nut reminds me of this thing that I found in one of the drill presses last year. I puzzled over this one for a long time before I even realized what had happened: I don't know what kind of mistake you have to make to un-twist a drill bit but, well, there it is.
|
#
?
Aug 28, 2017 05:18
|
|
|
|
| # ? Apr 28, 2024 00:54 |
|
|
Cheap chinesium, rosebud torch and vice grips, then put it in some-one else's drill caddy. Hitting a hardened pin or dowel you didn't expect to hit/be hardened can do it.
|
|
#
?
Aug 28, 2017 05:42
|
|
|
It would definitely be the latter, because the students aren't smart enough to do this deliberately as a joke, but they are certainly capable of destroying tools in amazing new ways.
|
|
#
?
Aug 28, 2017 05:59
|
|
|
FedEx had a bit of a mishap More here: https://imgur.com/a/faJ8X
|
|
#
?
Aug 28, 2017 06:08
|
|
|
`Nemesis posted:FedEx had a bit of a mishap Princess Auto has a pretty good return policy on their jackstands.
|
|
#
?
Aug 28, 2017 06:11
|
|
|
`Nemesis posted:FedEx had a bit of a mishap Thread delivers
|
|
#
?
Aug 28, 2017 06:18
|
|
|
babyeatingpsychopath posted:I fought installing a turnbuckle for an hour today until I looked super-close. Someone had so perfectly cross-threaded it that the lefthanded end had both threadforms in it. I could spin a right-handed bolt into both ends of the turnbuckle. CAT INTERCEPTOR posted:Thread delivers
|
|
#
?
Aug 28, 2017 06:45
|
|
|
`Nemesis posted:FedEx had a bit of a mishap How? That a write-off yes?
|
|
#
?
Aug 28, 2017 08:23
|
|
|
There's a whole lot of commas in the cost to fix that, isn't there?
|
|
#
?
Aug 28, 2017 08:36
|
|
|
Well it's not more than two commas because if you hit three comma territory it's way cheaper to buy a new plane. The number of zeroes is the figure of concern.
|
|
#
?
Aug 28, 2017 08:41
|
|
|
I was originally going with a comment about the number of zeros, but I figured penny pinching and insurance would make drat sure it was an exact amount. 
|
|
#
?
Aug 28, 2017 08:53
|
|
|
Did the stands fail, or were they positioned wrong and just pressing against the skin instead of supporting the spars?
|
|
#
?
Aug 28, 2017 09:07
|
|
|
Went and tried to find more info, this was on reddit:quote:This jet was N411FE and had already been retired (2013) when this occurred (2014). The hull is in storage in Victorville. They were trying to harvest the landing gear when the jack stand failure occurred.
|
|
#
?
Aug 28, 2017 12:03
|
|
|
I wonder if ruined underwear factors into the insurance claim. That had to be pretty gnarly having a plane come off the stands over you.
Beach Bum fucked around with this message at 12:26 on Aug 28, 2017 |
|
#
?
Aug 28, 2017 12:13
|
|
|
joat mon posted:
Why? It looks like it's all there. Mostly. Memento posted:Driving them stupidly around an empty farm paddock while drunk and/or high and possibly eventually flipping them or otherwise loving them. I will admit to having done this (field bombing) in high school in my wrecked but running 1978 Fiat 128 sedan. A buddy rolled it on our gravel road but the only damage besides dents and scrapes was the windshield was broken out because the rollover tweaked the greenhouse. It still ran and drove fine. It was gangs of fun to blast across the pasture without a care about the car. Eventually sold it to a friend who used bits of it to fix his X1/9 (same drivetrain, just in the front in my 128.)    Turns out that a tallish narrow vehicle like that with IRS tens to dig the rear wheel in to soft surfaces, like, say, a gravel road, and flip right the gently caress over if you get it sideways, which my buddy did, thanks to the aforementioned gravel and a bit too much right pedal application. That *was* my first car. I can't stop watching this. Or this. That is a determined fire. Collateral Damage posted:Did the stands fail, or were they positioned wrong and just pressing against the skin instead of supporting the spars? It looks like both jack stands that punched through are not on the jacking points, so maybe the airframe shifted from efforts to remove the landing gear?
|
|
#
?
Aug 28, 2017 17:02
|
|
|
Darchangel posted:Why? It looks like it's all there. Mostly. I found the rest between the pressure plate and the clutch disk.
|
|
#
?
Aug 29, 2017 00:34
|
|
|
`Nemesis posted:FedEx had a bit of a mishap
|
|
#
?
Aug 29, 2017 00:58
|
|
|
Dahir Insaat returns! https://www.youtube.com/watch?v=NZjnhL4WddE
|
|
#
?
Aug 30, 2017 18:09
|
|
|
That places way too much trust in ordinary drivers. Someone is going to pull out in front of one of those things, it falls over and someone else gets crushed to death.
|
|
#
?
Aug 30, 2017 18:12
|
|
|
That overlooked a ton of poo poo. Like you're going to have to do more than reinforce the surface. What do you suppose that'd weigh? 40 tons? Especially in cities with subway systems
|
|
#
?
Aug 30, 2017 20:25
|
|
|
I wish I had a sweatshop full of 3D animators to make videos of things I think up while stoned out of my gourd.
|
|
#
?
Aug 30, 2017 21:45
|
|
Boys who love boys
|
Cojawfee posted:That places way too much trust in ordinary drivers. Someone is going to pull out in front of one of those things, it falls over and someone else gets crushed to death. I see you're unfamiliar with Dahir Insaat's particular brand of insanity. This is the dude who came up with a drive-in grocery store.
|
|
#
?
Aug 31, 2017 00:11
|
|
|
monsterzero posted:I wish I had a sweatshop full of 3D animators to make videos of things I think up while stoned out of my gourd. So you want to be Dan Harmon?
|
|
#
?
Aug 31, 2017 00:21
|
|
|
Plinkey posted:So you want to be Dan Harmon? I was going to say Seth Rogen.
|
|
#
?
Aug 31, 2017 00:27
|
|
|
Dahir Insaat is incredible. Retsupurae had some hilarious commentary videos up for a while, they got copyright struck but you can still find them if you google.
|
|
#
?
Aug 31, 2017 01:38
|
|
|
A friend of a friend here in SF has been trying to make a gyroscopically stabilized motorcycle-like commuter car thing for like ten years now. http://litmotors.com/ There's still only the one prototype, which he works on when he feels like it in between racing motorcycles and building rock-crawling trucks (extraordinarily wealthy family). It does work, and can balance itself on two wheels at a stop, but because progress is "whenever" I think most of the tech press and investors have lost interest. I don't really see the point personally.
|
|
#
?
Aug 31, 2017 03:45
|
|
|
Sagebrush posted:A friend of a friend here in SF has been trying to make a gyroscopically stabilized motorcycle-like commuter car thing for like ten years now. They were actually a thing in the 1920s https://en.wikipedia.org/wiki/Gyrocar
|
|
#
?
Aug 31, 2017 04:29
|
|
|
It really is kind of pointless because the width of the vehicle you need to house the gyro mass means you might as well just stick four wheels on it.
|
|
#
?
Aug 31, 2017 08:28
|
|
|
Maybe combine it with flywheel energy storage. https://en.wikipedia.org/wiki/Gyrobus
|
|
#
?
Aug 31, 2017 08:33
|
|
|
https://www.youtube.com/watch?v=VbdkZB9-Sd4
|
|
#
?
Aug 31, 2017 08:38
|
|
|
Sagebrush posted:...a gyroscopically stabilized motorcycle-like commuter car thing... 
|
|
#
?
Aug 31, 2017 09:31
|
|
|
Technically, isn't every motorcycle "gyroscopically stabilized"?
|
|
#
?
Sep 1, 2017 03:02
|
|
|
No. The gyroscopic effect of the wheels has almost nothing to do with stability. Skilled riders can prove this by keeping their bike upright while crawling forwards at a less-than-walking pace, where the wheels are turning so slowly that the gyroscopic force can be ignored. The main reason that a tandem two-wheeled vehicle stays balanced is because it's continuously steered to keep the center of gravity in line with the wheels, and because the frame geometry is designed to return it to that position when no imbalanced forces are applied.
|
|
#
?
Sep 1, 2017 03:14
|
|
|
Have you ever driven a lovely bike with steel wheels and a fancy bike with CF/Alum wheels? Did you take your hands off the handle bars on both and notice how the later is significantly harder to keep balanced?
|
|
#
?
Sep 1, 2017 03:29
|
|
|
The deciding factor was usually the headset bearings, if you're talking pedal bikes.
|
|
#
?
Sep 1, 2017 11:57
|
|
|
FatCow posted:Have you ever driven a lovely bike with steel wheels and a fancy bike with CF/Alum wheels? Did you take your hands off the handle bars on both and notice how the later is significantly harder to keep balanced? I might be qualified to make that comparison and I think my road bike might be fancy enough. Nope. It's headset stiffness that makes for a more stable no hands bike. CAT INTERCEPTOR fucked around with this message at 13:12 on Sep 1, 2017 |
|
#
?
Sep 1, 2017 13:10
|
|
|
Fork rake and frame geometry for road bikes also have a lot to do with the apparent instability of those bikes. It's not a bug, it's a deliberate feature -you want that bike to be maneuverable and respond to input quickly
|
|
#
?
Sep 1, 2017 15:35
|
|
|
I remember some researchers tested this by building a bike that had another set of wheels above the normal wheels touching them. These would spin at the same speed in opposite direction to nullify the gyroscopic effect and it was still rideable pretty normally.
|
|
#
?
Sep 1, 2017 18:34
|
|
|
Gyroscopic effect takes some serious speed to be noticeable with light bicycle wheels. You can balance a bicycle while barely moving, but gyroscopic effect doesn't become noticeable until you're over 20mph, generally. People that think gyroscopic effect does much to help balance bikes don't ride, or don't think about what they do to balance.
|
|
#
?
Sep 1, 2017 18:50
|
|
|
|
| # ? Apr 28, 2024 00:54 |
|
|
Well "noticeable" is relative. Hold a bicycle wheel at the axle and have someone spin it, you'll feel it. It's not gonna help you keep balance on a bike though.
|
|
#
?
Sep 1, 2017 19:19
|
|