11–20 of 62 posts
Here’s a clip of the weapon being used in the movie: https://m.youtube.com/watch?v=jOKf5r_JMAo
Interesting that this was literally the major plot point in one of the GI Joe movies. I wonder if they got the idea from the movie. If you google around, the weapon in the movie created a lot of discussion about the real life viability and physics involved about this exact topic. Here’s a clip of the weapon being used in the movie: https://m.youtube.com/watch?v=jOKf5r_JMAo
Sure, they got the idea from the GI Joe movies /s
Interesting that this was literally the major plot point in one of the GI Joe movies. I wonder if they got the idea from the movie. If you google around, the weapon in the movie created a lot of discussion about the real life viability and physics involved about this exact topic. Here’s a clip of the weapon being used in the movie: https://m.youtube.com/watch?v=jOKf5r_JMAo
There's an economic incentive for the moon base! Since it's so expensive to bring heavy payloads up by rocket we can just mine them on the moon. It surely won't be too long until the US needs to mass-produce the godrods anyway.
> 20 feet long, 1 foot in diameter tungsten rods I was curious about the price of this so I did some monster math (FYI complete arms layman, serious errors are likely). Raw materials: Volume is 15.7 cu ft = 444,574.5 cm3. Density is 19.3g/cm3 = 8,580 kg. Estimated price of $30.3k per metric ton [1] = $260k in tungsten. Cheap. Now for launch price. SpaceX advertises $90 million for 8 metric tons launched into low-eart…
That price per ton doesn't include making it in the desired shape, though, right? Tungsten is very tough to work with, so I imagine that'd add significantly to the price, though I've no idea how much.
How accurate can it be - or does it only work when there is almost no wind? Also, isn't there a maximum velocity based on air drag - if so, can something similar not be dropped from a plane?
Interesting that this was literally the major plot point in one of the GI Joe movies. I wonder if they got the idea from the movie. If you google around, the weapon in the movie created a lot of discussion about the real life viability and physics involved about this exact topic. Here’s a clip of the weapon being used in the movie: https://m.youtube.com/watch?v=jOKf5r_JMAo
"During the Vietnam War, the US used what it called "Lazy Dog" bombs. " Sure, they got the idea from the GI Joe movies /s
It’s a symbiotic relationship at times. Eg Computers became a thing, fiction ran with it and made up hand held tablet computers, Tricorders, universal translators etc, which materially (not always exclusively) influence future technology designs and directions. Today we have real tablet computers, universal translators etc which were inspired by fiction.
Edit: I missed the specific point being made that the Vietnam War was well, well before the GI Joe movies in question. Apologies!
> 20 feet long, 1 foot in diameter tungsten rods I was curious about the price of this so I did some monster math (FYI complete arms layman, serious errors are likely). Raw materials: Volume is 15.7 cu ft = 444,574.5 cm3. Density is 19.3g/cm3 = 8,580 kg. Estimated price of $30.3k per metric ton [1] = $260k in tungsten. Cheap. Now for launch price. SpaceX advertises $90 million for 8 metric tons launched into low-eart…
That price per ton doesn't include making it in the desired shape, though, right? Tungsten is very tough to work with, so I imagine that'd add significantly to the price, though I've no idea how much.
You can also sinter it, it doesn't need to be especially strong, just hold itself together while falling, and sintering can make it strong enough.
The strength plays no part at all when it impacts. At the energy involved it might as well be a noodle. It just needs to handle the heat and resistance of reentry. Mainly heat.
> 20 feet long, 1 foot in diameter tungsten rods I was curious about the price of this so I did some monster math (FYI complete arms layman, serious errors are likely). Raw materials: Volume is 15.7 cu ft = 444,574.5 cm3. Density is 19.3g/cm3 = 8,580 kg. Estimated price of $30.3k per metric ton [1] = $260k in tungsten. Cheap. Now for launch price. SpaceX advertises $90 million for 8 metric tons launched into low-eart…
That price per ton doesn't include making it in the desired shape, though, right? Tungsten is very tough to work with, so I imagine that'd add significantly to the price, though I've no idea how much.
I have my doubts. You would have to stop it from orbiting first (8km/s). What kind of rocket would be needed to get 8km/s deceleration of 12 tons on LEO? And it would only gain 10km/s. Why not go directly from the ground then?
It doesn't even take 1km/s to deorbit. https://space.stackexchange.com/questions/12011/how-could-a-...