On his science book blog John Ptak posted an entry entitled, "Dreaming of the 10-Ton Eiffel Tower Bullet, 1891," about a proposed fun ride in which people would sit inside a giant bullet and freefall from the top of the Eiffel Tower into a pool of water.
Physics of impact aside for the moment, M.Carron’s bullet capsule would be released from the top of the interior of the Tower, about 1000 feet high, and released to fall into an excavated pool 150’ across and 200’ deep. The idea was that in addition to the springs inside the capsule, the water would act as a “shock absorber”, and so “the shock felt by the occupants on landing will be in no way unpleasant”.
Dreaming of the 10-Ton Eiffel Tower Bullet, 1891
[Okay, so the thing would hit at 178mph or so, and, assuming that the whole thing didn’t get completely crushed on impact, I’m not so sure that 200’ of depth is very much wiggle room for the thing to come to a halt (if it didn’t deform). Also it would have to not have any wind deflection so as to not veer off its perfect entry into the water. And so on. Calculating the force of impact is difficult without knowing how far down the bullet would go, but hitting the water at 80 m/s and stopping at 30 meters would yield something like 28,600,000 KE and 1,274,000 N. There are lots of problems…]
The thing is, though, the thing that made this so appealing, is that for the 20-francs that get a person a seat in the bullet, that they would each get to go twice as fast as any human had ever traveled before ( 65 miles per hour was about the speed of the fastest train constructed).
This gadget does exactly as promised: it looks like a thumbdrive (sort of) and fries the circuitry of any computer it’s plugged into. It’s made from camera flash parts, is charged with a standard AA battery, and delivers a 300V zap of DC destruction to the port for all your USB-murdering needs. Note that this […]
The Cobham catalog, exposed by The Intercept, features countless pages of surveillance gadgets sold to U.S. police to spy on American citizens: tiny black boxes with a big interest in you. In the creepily bland feature lists and nerdy product names is a whisper of a dark future; perhaps darker than anyone can imagine.
This image depicts the most commonly-found stylesheet colors on the web’s top sites—Paul Hebert did an amazing amount of analysis and this is just one of the intriguing visualizations he came up with. Most of these are obvious staples, especially HTML red and blue, though it’s interesting how far the blue “cluster” is from the […]
The Boing Boing Store’s Gift Guide is full of ideas for pretty much anyone in your life like hipster ice cub trays, Xbox controllers, Halo Boards, and even diamond necklaces. As always, all products in the Boing Boing Store come at great discounts, too. Shop by price bucket starting at under $20. Under $20:Bloxx Jumbo Ice Trays […]
Unlike traditional lighters, the SaberLight features an electronic plasma beam that’s both rechargeable and butane-free. This sleek lighter is even approved by TSA, so you’ll never be stuck buying lighters you’ll just have to throw away partially used. For some people, like me, this is a pretty big game-changer. The SaberLight’s beam is actually both hotter and cleaner […]
Holiday shopping is in full swing, and the Striiv Touch is one of the best gift ideas I’ve landed on. Its simple design works for females and males, and its wide range of features makes it suitable for even the non-fitness enthusiasts in your life.Unlike traditional fitness trackers, the Striiv Touch also acts as a smartwatch. It […]