It's a pet peeve of mine how small bullets are. here's 308, a real man-stopper of a battle rifle cartridge. and right next to it is a pocket knife that would be too small to be a reliable self defense weapon. and yet its blade is bigger than the whole cartridge, let alone the bullet. I get why the bullet is so much deadlier, but it just feels wrong
50 years ago was 1970, they could absolutely comprehend a multi-purpose portable computer and communication device. People from 100 years ago, at least the ones that were tech-savvy for their time, could get to grips with it too.
But I think that's besides the point you were making.
we're talking about the physical hardware, not the concept. we're currently conceptualizing way more high tech than just lasers and railguns, but like you said, they require "literal magic" to run. A modern day flagship smartphone is a more powerful computer than your run of the mill desktop PC from 2010, now imagine it compared to a computer from 1974. Plus the screen, camera, gyro sensors, all in a device that weighs oz and fits in your pocket, oh and it also runs for several days off of a recharge that takes only 2 hours.
And that's not even considering the internet, which is an integral part of the smartphone.
2 months ago
Anonymous
You do realize your phone is dumping a lot of potentially dangerous radio energy into your sensitive flesh, right? Anumber of you and your loved ones WILL die from this.
2 months ago
Anonymous
Not really dangerous,some radowave are dangerous (ex:microwaves) but not on the phone,unless you have your head sticked in the phone
Xerox Park was a thing then. My dad used a "portable" computer that weighed thirty pounds, sported a 4-inch monocolor screen and ran SAMNA for its word processor via ZDS floppies. It was connectable via ATT modem to corporate and BBS. I hold PhD's in CS and EE/hardware design. While I couldn't avail myself of massive parallels, I still built awesome "computers" for USA that can still resolve these issues quickly.
black powder firearms had massive bores on the other hand
anything smaller than 50 caliber was hardly enough for taling down men if it was a rifle, and 44 cal was standard for pistols
in smoothbore days people were using 75 caliber guns which is how big a 20mm is
It's an old cartridge, it needed a lot of case capacity for primitive smokeless propellant and the designers of the time hadn't figured out yet that short and fat means a more efficient burn.
its only slightly larger than the diameter of a 12 gauge, far from being an artillery round
75mm/3 inch is where artillery starts, you should collect those instead
caliber is percentage of an inch. one inch is 25.4mm so 20mm means the projectile has a diameter of about 4/5 of an inch.
.50 caliber is 12.7mm
.30 caliber is 7.62mm
.223 caliber is 5.56mm
outside of rounds that have existed on the american market and then got nato designations you'll generally use one or the other and not convert.
just know the common sizes and what they are in inches, and you'll notice a pattern
5.56mm >.219 inches (roughly .22)
7.62mm > .30 inches
20mm > .76 inches
40mm > 1.57 inches
50mm > 2 inches~
76.2mm > 3 inches
105mm >4.1 inches~
155mm > 6.1 inches~
caliber is percentage of an inch. one inch is 25.4mm so 20mm means the projectile has a diameter of about 4/5 of an inch.
.50 caliber is 12.7mm
.30 caliber is 7.62mm
.223 caliber is 5.56mm
outside of rounds that have existed on the american market and then got nato designations you'll generally use one or the other and not convert.
just know the common sizes and what they are in inches, and you'll notice a pattern
5.56mm >.219 inches (roughly .22)
7.62mm > .30 inches
20mm > .76 inches
40mm > 1.57 inches
50mm > 2 inches~
76.2mm > 3 inches
105mm >4.1 inches~
155mm > 6.1 inches~
It's a pet peeve of mine how small bullets are. here's 308, a real man-stopper of a battle rifle cartridge. and right next to it is a pocket knife that would be too small to be a reliable self defense weapon. and yet its blade is bigger than the whole cartridge, let alone the bullet. I get why the bullet is so much deadlier, but it just feels wrong
it just goes to show how efficient firearms are at killing stuff, even after we get lasers and railguns they will never really go away
They're so efficient that we'd need to invent actual magic for lasers and railguns to replace them.
smartphones are actual magic to someone living 50 years ago
50 years ago was 1970, they could absolutely comprehend a multi-purpose portable computer and communication device. People from 100 years ago, at least the ones that were tech-savvy for their time, could get to grips with it too.
But I think that's besides the point you were making.
1974 to be precise.
we're talking about the physical hardware, not the concept. we're currently conceptualizing way more high tech than just lasers and railguns, but like you said, they require "literal magic" to run. A modern day flagship smartphone is a more powerful computer than your run of the mill desktop PC from 2010, now imagine it compared to a computer from 1974. Plus the screen, camera, gyro sensors, all in a device that weighs oz and fits in your pocket, oh and it also runs for several days off of a recharge that takes only 2 hours.
And that's not even considering the internet, which is an integral part of the smartphone.
You do realize your phone is dumping a lot of potentially dangerous radio energy into your sensitive flesh, right? Anumber of you and your loved ones WILL die from this.
Not really dangerous,some radowave are dangerous (ex:microwaves) but not on the phone,unless you have your head sticked in the phone
Xerox Park was a thing then. My dad used a "portable" computer that weighed thirty pounds, sported a 4-inch monocolor screen and ran SAMNA for its word processor via ZDS floppies. It was connectable via ATT modem to corporate and BBS. I hold PhD's in CS and EE/hardware design. While I couldn't avail myself of massive parallels, I still built awesome "computers" for USA that can still resolve these issues quickly.
You tried to shove it up your gaping ass, but felt nothing, didn't you
Leatherman Wingman?
leatherman sidekick but I don't think you'd be able to tell the difference from that picture. pretty sure the main knife and the handle are identical
black powder firearms had massive bores on the other hand
anything smaller than 50 caliber was hardly enough for taling down men if it was a rifle, and 44 cal was standard for pistols
in smoothbore days people were using 75 caliber guns which is how big a 20mm is
Were you expecting 20cm?
It's a training round - notice the blue color and "T" markings.
They come in smaller doses so you can train for an immunity to full-size 20mm rounds
Thank for the help.and no,i know 20mm is 2cm
it's about the size of my hand (average hand size)
20mm is barely an autocannon. The shells are pitiful.
why is 40x364 so looong
To penetrate and shred better
It's an old cartridge, it needed a lot of case capacity for primitive smokeless propellant and the designers of the time hadn't figured out yet that short and fat means a more efficient burn.
If i remember correctly,like OP said it's a training round for the M61 vulcain. It's also inert
Yes
its only slightly larger than the diameter of a 12 gauge, far from being an artillery round
75mm/3 inch is where artillery starts, you should collect those instead
As a /k/ tourist, how do you convert between caliber and mm size? Are they two different systems or what?
.50 BMG is 1/2" or 12.7mm.
Ah! that makes sense to me now! thank you!
caliber is percentage of an inch. one inch is 25.4mm so 20mm means the projectile has a diameter of about 4/5 of an inch.
.50 caliber is 12.7mm
.30 caliber is 7.62mm
.223 caliber is 5.56mm
outside of rounds that have existed on the american market and then got nato designations you'll generally use one or the other and not convert.
just know the common sizes and what they are in inches, and you'll notice a pattern
5.56mm >.219 inches (roughly .22)
7.62mm > .30 inches
20mm > .76 inches
40mm > 1.57 inches
50mm > 2 inches~
76.2mm > 3 inches
105mm >4.1 inches~
155mm > 6.1 inches~
0.315 In => 8.001mm