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That car on fire? Looks like an intrepid to me
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Sep 9, 2018 07:14
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Fire or a windowed block was the eventual fate of all of them anyway.
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Sep 9, 2018 08:23
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STR posted:Fire or a windowed block was the eventual fate of all of them anyway. Being a Chrysler/Dodge I would think it'd be an exploded transmission. Or "Exploded FWD transaxle" if you're feeling snotty about it.
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Sep 9, 2018 08:27
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If anyone gets snotty about that they can shove it. I bet FWD cars with separate diffs are far rarer than RWD cars with transaxles, in both absolute numbers and percent of all _WD models. The distinction is hardly worth making.
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Sep 9, 2018 09:17
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FWD Transmissions with a separate drain and fill just for the diff are bullshit. Even if you change the transmission fluid you'll still have ancient gunk in the diff, and a lot of shops will argue you to death about whether it's necessary or not to also change the diff fluid.
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Sep 9, 2018 09:24
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Colostomy Bag posted:I'm having a hard time wrapping my head around this math. I guess I'm comparing the the energy from a falling .22LR round versus a perfect falling screwdriver? The number I gave for comparison was the bullet's muzzle energy, so being hit by the falling screwdriver is comparable to being shot with a .22. A falling bullet has far less energy than that, as you noted. 9.6 joules is on the order of what you'd get from a low-powered paintball gun (though the falling bullet would do more damage obviously because it's not made of gelatin)
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Sep 9, 2018 16:44
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I found my coolant leak.  
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Sep 9, 2018 16:47
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Sagebrush posted:The number I gave for comparison was the bullet's muzzle energy, so being hit by the falling screwdriver is comparable to being shot with a .22. A falling bullet has far less energy than that, as you noted. 9.6 joules is on the order of what you'd get from a low-powered paintball gun (though the falling bullet would do more damage obviously because it's not made of gelatin) Why on earth are you people assuming the bullet is at terminal velocity? You can see the angle it hit at, that it was far from falling straight down. There's a round entrance and a non round exit which is perfectly in line with a bullet that's still flying point-first, following an arcing path, and inconsistent with a fall at terminal velocity. One of you even mentioned the Mythbusters episode where they found that a bullet fired even a few degrees from straight up comes down at bullet speed, not at terminal velocity. They talked to a doctor who told them about people dying from bullets coming down at very steep angles. If you google for bullet holes in stuff you can see that irregular areas of knocked off paint is normal for bullet holes.
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Sep 9, 2018 17:13
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Wouldn't the exit hole be considerable larger than the entry?
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Sep 9, 2018 17:35
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What if someone launched a screwdriver? What then, Einstein?
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Sep 9, 2018 18:00
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InitialDave posted:I found my coolant leak. A rover with a coolant leak? Surely Not!
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Sep 9, 2018 18:09
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wesleywillis posted:Wouldn't the exit hole be considerable larger than the entry? The picture I took didn't show the profile of the exit very well, it basically splits and has two lips that bend backwards with a profile as if a screwdriver was put through it; I would liken it to the mouth of a vent worm, or that one asteroid space worm from Empire Strikes Back. I would think it would take an awful lot of force to go through two layers of sheet aluminum in one go without pushing the surrounding sheet metal downwards. I guess what I'm trying to say is whatever made the hole was moving fairly quickly and with enough force to penetrate each layer in one go, and I don't know if you could do that with a screwdriver, but it seems difficult to explain the circumstances behind a bullet doing the same thing. Cojawfee posted:What if someone launched a screwdriver? What then, Einstein? It is definitely one of the more likely possibilities that someone launched a screwdriver by transfer of kinetic energy using the big hammer E: Or, a narrative that makes a decent amount of sense, someone was shooting pigeons and they missed. Double Edit Blue Footed Booby posted:Why on earth are you people assuming the bullet is at terminal velocity? You can see the angle it hit at, that it was far from falling straight down. There's a round entrance and a non round exit which is perfectly in line with a bullet that's still flying point-first, following an arcing path, and inconsistent with a fall at terminal velocity. EvenWorseOpinions fucked around with this message at 18:26 on Sep 9, 2018 |
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Sep 9, 2018 18:22
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InitialDave posted:I found my coolant leak. I knew about total loss oiling systems but that's a new one.
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Sep 9, 2018 18:47
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Blue Footed Booby posted:One of you even mentioned the Mythbusters episode where they found that a bullet fired even a few degrees from straight up comes down at bullet speed, not at terminal velocity. They talked to a doctor who told them about people dying from bullets coming down at very steep angles. This has got me interested, because I've been told this before but I don't really get it. If you're firing a bullet on a steep parabolic trajectory (so gun barrel pointed a few degrees off vertical), doesn't it lose energy until it reaches the summit, at which point it basically 'stops', with just a small amount of horizontal velocity, and from there on in the fastest it can go is [terminal velocity + whatever horizontal speed it has - air resistance]? Seeing as it's just being accelerated by gravity from a stop at that point. I have never used a gun in my life but I understand how mortars work. Please explain, I want to understand. And don't tell me to watch mythbusters, can't stand that poo poo.
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Sep 9, 2018 21:44
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Gravity doesn't oppose the horizontal speed, the only decrease in the value of the horizontal speed is from wind resistance. Depending on the degrees off vertical that you are firing the decrease in your horizontal speed may be pretty negligible by the time that gravity has stopped the bullet from traveling upwards. If someone fires a bullet directly upwards, the bullet will have no horizontal speed, and will fall at no more than terminal velocity. It will land on the shooter and make a *boink* noise and probably be uncomfortable If someone is trying to shoot at a target a decent distance away they aim upwards somewhat to compensate for the force of gravity opposing the bullet's straight path. At the parabola the round's vertical speed becomes zero but the horizontal speed has been reduced by an amount you would consider negligible if you were on the receiving end. If someone is celebrating the fourth of July on their porch in Tennessee and fires a shotgun slug with 1800 feet per second muzzle velocity at ten degrees off of vertical, it will be initially traveling at about 312 feet per second horizontally, decreased due to wind resistance by an amount I would probably consider negligible if I happen to be standing where it lands This is an oversimplification of course, but it illustrates the math involved EvenWorseOpinions fucked around with this message at 22:13 on Sep 9, 2018 |
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Sep 9, 2018 22:06
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A rifle with a big, slow bullet and a trajectory resembling a rainbow at a hundred yards can be reasonably accurate at two miles, and still punch through several inches of pine boards. https://lots showing pretty much the exact angle of the projectile that made the hole in the photo in questions.
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Sep 9, 2018 22:41
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Bad Angus! Bad!
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This can be safely shown at a paintball park. If you shoot straight up, the lovely house brand balls bounce off of people when they hit the ground. A 70° arc however will still carry enough velocity to bruise the poo poo out of the poor bastards on top of the castle in the middle of the field. I've been on the receiving end of that poo poo way too often. Generally when I've just rushed up to mid point and haven't even engaged/seen anyone yet, while I'm still behind the walls.
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Sep 9, 2018 22:52
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Kafouille posted:I knew about total loss oiling systems but that's a new one. Boil-off cooling has been an accepted part of ultra-high performance air racing for decades now - about time this technology trickled into road vehicles.
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Sep 10, 2018 02:03
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IPCRESS posted:Boil-off cooling has been an accepted part of ultra-high performance air racing for decades now - about time this technology trickled into road vehicles.
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Sep 10, 2018 09:34
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That's when you install the collection scoop and coolant scavenge pump. Like ships in the Mass Effect universe!
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Sep 10, 2018 09:35
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InitialDave posted:I found my coolant leak. So, what do we win for a correct diagnosis?
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Sep 10, 2018 11:02
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I gotta own this one: Shitbox trailer that was needed to haul our shitbox boat one more loving time. Both trailer and boat were cut up and thrown in a dumpster after this tow. The helper spring and perch fell off when I turned onto our road. My wife was following me as a debris-removal car, and picked it up. Far spring has lost it's lower retainer and the helper spring. Near spring has split the retainer in half and the helper spring is bound up and jammed. Good riddance. Thankfully, it was spring under, not spring-over.
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Sep 10, 2018 14:56
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Student complained "this bandsaw isn't cutting very well"
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Sep 10, 2018 19:55
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Sagebrush posted:Student complained "this bandsaw isn't cutting very well" At least the student noticed. Given what I've seen as a student going through those types of classes I have to imagine the life insurance questionnaire amounts to the following: 1) Do you pilot private airplanes? 2) Do you smoke 2 packs a day? 3) Are you a shop teacher?
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Sep 10, 2018 20:05
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C-Bangin' it 
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EvenWorseOpinions posted:Gravity doesn't oppose the horizontal speed, the only decrease in the value of the horizontal speed is from wind resistance. Depending on the degrees off vertical that you are firing the decrease in your horizontal speed may be pretty negligible by the time that gravity has stopped the bullet from traveling upwards. Thanks for the explanation. I think my problem is I'm picturing a trajectory that's basically a spike shape, but in reality bullets go so fast that even only slightly off vertical sends them in a huge semicircular arc which makes sense. Sagebrush posted:Student complained "this bandsaw isn't cutting very well" "Fire it up, touch it and let me know if it's blunt"
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Sep 10, 2018 20:08
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sharkytm posted:I gotta own this one: That's an impressive amount of iron oxide.
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Sep 10, 2018 20:31
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Darchangel posted:That's an impressive amount of iron oxide. Pffft, sitting in the upper midwest..."hold my beer."
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Sep 10, 2018 21:17
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Sagebrush posted:Student complained "this bandsaw isn't cutting very well" My retired shop teacher uncle, who once lost the tip of his index finger showing students how not to put wood thru a table saw, just shuddered involuntarily and doesn't know why.
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Sep 10, 2018 22:35
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InitialDave posted:I found my coolant leak. Nothing a little FLEX TAPE couldn't fix!!
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Sep 10, 2018 22:36
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sharkytm posted:I gotta own this one: Reminds me of the rear crossbar on my boat trailer that I discovered had started to crack in two earlier this summer. 
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Sep 10, 2018 23:52
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Yeah. The trailer was from 1971. The bottom of the main support bar that leads from the A-frame to the hitch coupler was completely gone on the bottom, but I wasn't worried about that nearly as much as the axle/springs. Those old trailers were made out of much thicker steel than the new stuff. I was just hoping to get through the 1981 boat's life with the trailer it came on, so mission accomplished. We're having a new boat built by a local wooden boat builder (all plywood and dimensional lumber, none of that fancy-pants cross-planked fanciness for us), and I've already got a much larger and better trailer in the yard.
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Sep 11, 2018 00:36
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If you wait a few more years it would probably just dissolve completely on its own!
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Sep 11, 2018 05:43
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Dirt Road Junglist posted:My retired shop teacher uncle, who once lost the tip of his index finger showing students how not to put wood thru a table saw That must have been a really effective lesson.
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Sep 11, 2018 05:58
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Seat Safety Switch posted:That must have been a really effective lesson. "Don't do this." *eeeeeeeeeerrrrrrrrrr-snip* 
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Sep 11, 2018 13:08
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As you can see, there are only a few simple principles to bear in mind, while operating a sophisticated piece of machinery like this........ Table saw? https://youtu.be/toNsPh-pxgc?t=17
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Sep 11, 2018 13:12
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That link is staying blue.
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Sep 11, 2018 15:10
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It's a clip from UHF, relax.
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Sep 11, 2018 15:15
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I always found this one interesting: https://www.youtube.com/watch?v=u7sRrC2Jpp4 It's a guy talking about kickback, and demonstrating how to avoid it It should be cued up (Edit: it's not, go to 2:30) to the part that was really interesting though, which is where, even though he knew exactly what was going to happen, he still ended up almost losing a finger. Table saws are dangerous if you're not careful, and I say that as someone who has had 16 stitches and 2 flayed open knuckles because of one. The only reason I still have my right pointer and middle fingers is because of dumb luck that the saw teeth never caught a ligament or bone, just flesh.
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Sep 11, 2018 15:34
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AFewBricksShy posted:I always found this one interesting: That dude rules.
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Sep 11, 2018 15:49
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 Holy poo poo. As I buy more hardware for the shop, that video will definitely influence my plan. His assessment owns, too.
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Sep 11, 2018 17:00
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