Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
Thin Film Dome Protects Cities From Nuclear Blasts
How is it possible that a thin film dome could protect a city from harm in the event of nuclear attack? Read on.
(Cheap Method for Shielding a City from Rocket
and Nuclear Warhead Impacts)
His idea is a thin dome covering a city with that is a very transparent film 2 (Fig.1). The film has thickness 0.05 – 0.3 mm. One is located at high altitude (5 - 20 km). The film is supported at this altitude by a small additional air pressure produced by ground ventilators. That is connected to Earth's ground by managed cables 3. The film may have a controlled transparency option. The system can have the second lower film 6 with controlled reflectivity, a further option.The offered protection defends in the following way. The smallest space warhead has a minimum cross-section area 1 m2 and a huge speed 3 – 5 km/s. The warhead gets a blow and overload from film (mass about 0.5 kg). This overload is 500 – 1500g and destroys the warhead (see computation below). Warhead also gets an overpowering blow from 2 -5 (every mass is 0.5 - 1 kg) of the strong stones. Relative (about warhead) kinetic energy of every stone is about 8 millions of Joules! (It is in 2-3 more than energy of 1 kg explosive!). The film destroys the high speed warhead (aircraft, bomber, wing missile) especially if the film will be armored by stone...
(Cheap Method for Shielding a City from Rocket
and Nuclear Warhead Impacts)
Regular Technovelgy readers might be thinking of the long history of science-fictional domes, like the glass dome described in A Modern Utopia (1905) by H.G. Wells or the moon dome described in Brigands of the Moon by Ray Cummings, published by Astounding Stories of Super Science magazine in 1930.
However, I was thinking of the roofed valley from Misfit, written by Robert Heinlein in 1939. In the story, a valley on an asteroid is selected for habitation. It is fitted with a "roof":
The Captain selected a little bowl-shaped depression in the hills, some thousand feet long and half as broad, in which to establish a permanent camp. This was to be roofed over, sealed, and an atmosphere provided..."Is this roof going to be just fifty feet high?"
"No, it will average maybe a hundred. It bellies up in the middle from the air pressure..."
Libby concentrated for an instant, then looked puzzled. "But look -- This valley is a thousand feet long and better than five hundred wide. At half of fifteen pounds per square inch, and allowing for the arch of the roof, that's a load of one and an eighth billion pounds. What fabric can take that kind of a load?"
"Cobwebs."
"Cobwebs?"
"Yeah, cobwebs. Strongest stuff in the world, stronger than the best steel. Synthetic spider silk. This gauge we're using for the roof has a tensile strength of four thousand pounds a running inch."
Don't miss these dome-related stories; Glass Dome Cities On Mars, Dreamed By Elon Musk and Space Domes Over-rated? Science Fiction Authors Have Answers.
Thanks to Dr. Rachel Pawling for posting about this study.
Scroll down for more stories in the same category. (Story submitted 11/1/2022)
Follow this kind of news @Technovelgy.| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
Would
you like to contribute a story tip?
It's easy:
Get the URL of the story, and the related sf author, and add
it here.
Comment/Join discussion ( 0 )
Related News Stories - (" Engineering ")
Anker's SOLIX Solar Umbrella Portable Power
As predicted by science fiction thirty-five years ago!
TSA 2 - Advanced Thermosensory Stimulator Is A Dune Pain Box
'As though a switch had been turned off, the pain stopped...' - Frank Herbert, 1965.
Amazing Wheel Shapeshifting In Real Time
'Each spoke telescopes into sections.' - Neal Stephenson, 1992
Mercedes Benz Solar Paint
'It turns sunlight into electricity, just like any solar power converter - you spray it on.' - Larry Niven, 1995.
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Stargate $500 Billion Investment in Artificial Intelligence
'... an artificial intelligence equal to the human.'
Jetson Orin Nano Super 70 Just $249
'Rayno folded up the microterm and tucked it back inside his jumper.'
Nano-Chainmail 2D Mechanically Interlocked Polymer
'Nemourlon armor of reasonable weight resists penetration by most fragments and any bullet that is not both reasonably heavy and fairly high-velocity.'
Anker's SOLIX Solar Umbrella Portable Power
As predicted by science fiction thirty-five years ago!
Positioned Cybertrucks With Free Starlinks WiFi In LA
'Several thousand of them formed the positioning grid on the rubble pile.'
AI-THu Shapeshifting Transformer Home
'Its slack walls tightened, bulged, were crossed by ripples and waves of movement.'
Xiaomi Self-Driving Self-Balancing Scooter
'Norman... had never ridden any motorized device that lacked onboard steering and balance systems.'
Transparent 4K OLED Wireless TV From LG
You will note that HG Wells also figured out the aspect ratio of the future!
TSA 2 - Advanced Thermosensory Stimulator Is A Dune Pain Box
'As though a switch had been turned off, the pain stopped...'
Humans Love Helping Other Species
'At the ringside opposite them a table had been removed to make room for a large transparent plastic capsule on wheels.'
Organic Non-Planar 3D Printing
'It makes drawings in the air following drawings...'
Your Window For Being A Tesla Optimus Remote Operator May Be Closing
'... he realized that the moving thing inside was - of course - a robot.'
Waymo Autonomous Cab Hits Autonomous Delivery Robot
'Not since the time he rewired the delivery robot...'
Amazing Wheel Shapeshifting In Real Time
'Each spoke telescopes into sections.'
Drone With Face Recognition Could Hunt You
'The spotter descends, and we think it searches the vicinity, looking for the victim’s face...'
Jizai Arms 'Free Limbs' Wearable Cyborg Arms
'Guy named Otto Octavius winds up with eight limbs. Four mechanical arms welded right onto his body. What are the odds?'
