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These are some spacecraft designs that are based on reality. So they appear quite outlandish and undramatic looking. In the next page will appear designs that are fictional, but much more breathtaking. Obviously the spacecraft on this page are all NASA style exploration vehicles, they are not very suited for interplanetary combat well, most of them at least.

Many of these spacecraft have a table of parameters. You can find the meaning of many of them here. Numbers in black are from the documents. Numbers in yellow have been calculated by me using the document numbers, these might be incorrect. The basic idea was to attempt to avoid the tyranny of Every Gram Counts by using in-situ resource utilization for the propellant. So instead of lugging miserly limited amounts of high-performance propellant all the way from Terra, the rocket would make do with unlimited amounts of low-performance propellants available locally on Mars.

There were several vehicles designed: including a supersonic winged craft and a ballistic "hopper". The latter is pictured here. They all featured a single solid core nuclear thermal rocket engine fed by a single propellant tank.

The easiest propellant to manufacture is liquid carbon dioxide. It can be produced from the Martian atmosphere using just high pressure kPa with no cryogenic cooling needed a 30 horsepower pump will do, requiring 25 kW, or 80 kilowatt hours per metric ton. Other propellants have superior performance but are much harder to manufacture.

Carbon dioxide has enough specific impulse to boost the NIMF from the surface of Mars into low Mars orbit, so the designers figured it was good enough. It also has enough Isp to hop the vehicle from point A to any other point on Mars. As I mentioned each metric ton of propellant sucked out of the atmosphere takes 80 kilowatt-hours, and the propellant tank holds about metric tons total. About 24, kilowatt-hours to fill it. How long it takes to fill the tank depends upon how many kilowatts the power source can feed the pump.

The nuclear engine has a shadow shield on top composed of steel, boron, and lithium hydride to protect the crew from radiation when the reactor is operating. A secondary toroidal propellant tank surrounds the reactor to protect crew walking on the surface when the reactor is idling. There is a second radiation shield right under the crew, to protect them from backscattered radiation reflected off the ground during landing.

The reactor elements will need special cladding , since when carbon dioxide is heated to high temperatures inside the reactor it will oxidize the heck out of everything it touches. Reactor elements designed for liquid hydrogen propellent won't work, they will rapidly erode and spray powdered glowing radioactive death while the reactor stops producing power and the ship plummets out of the sky.

You can read the details in the report. The single ferry tank is sized to contain , pounds of liquid hydrogen and has attached to its after-end, a thrust structure and four fast spectrum metallic-core nuclear reactor engines. Each of the four engines will produce 47, pounds of thrust so that with one engine inoperative, the initial thrust-to-weight ratio is 0.

The dry weight of the nuclear stage is 71, pounds, which results in a stage mass fraction of 0. The lunar shuttle, shown in docked position, employs the techique of receiving its propellant by the assembly of prepackaged modules in lunar orbit with the empty module being jettisoned on the lunar surface.

The lunar shuttle propulsion system uses LOX-LH 2 propellants and is designed around a cluster of three 20,pound thrust engines. The lunar shuttle personnel module is of the segmented sphere configuration sized to accommodate a total of 30 men and having all expendables and time-dependent subsystems sufficient for a two-day mission duration.

One spaceship that could make the trip is now under study by Ling-Temco-Vought, Inc. The tapered passenger-carrying nose of this ship below, left had departed from Earth three days earlier atop a booster. Once in orbit around the Earth, it had then hooked onto a foot-long nuclear-powered ferry the section carrying the American flag that carried into the region of the moon.

Having now attained a lunar orbit, the passenger section has swung down 17 feet on long tubular links, alowing a small spherical craft to hook on and load up the passengers for the mile trip down to the moon. In the background at right a similar nuclear ferry also has lowered its passenger section and is about to receive a moon shuttle. Scientists say the passenger section could be used over and over again—for as many as 50 round trips. The report has lots of juicy details, especially about the reactor.

Thanks go out to William Seney for bringing this study to my attention. The idea was to make a workhorse spacecraft for general space transportation needs, but especially a Mars mission. But dang, are they ever power hogs. To get a halfway worthwhile thrust will take megawatts of electricity.

A solar cell array rated for that much power would be rather huge, a nuclear reactor is indicated. A pity there is not a megawatt class heat radiator designed for freefall. It works in free fall, it is low mass, and it degrades gracefully if punctured by meteorites. It will keep cool an 8. This will supply 6 MW e to the hungry electric engines, and allow the rest of the spacecraft a generous 1.

A real work horse, har har. The engines are designed for a day burn time, approximately 1, day mission duration. No crew present during this mission segment because of the long time spent in the deadly Van Allen radiation belt. Once in GEO the crew of three boards the vehicle. The Mars mission takes days for the outbound leg, days at Mars, and days for the inbound leg. When it returns home its mass will be only tonnes, with 76 tonnes having been left on Mars. Magnetoplasmadynamic engines are electro magnetic engines.

They use the Lorentz force to accelerate the propellant. Three phase alternating current at ten to twenty kilovolts and 1, Hertz is fed through a transformer and rectifier into the thruster. The engine assembly is an array of seven thrusters, used one at a time, for a day burn. The lifetime of a thruster is limited by the erosion of the cathode, it is estimated to be 2, hours 83 days.

The azimuthal donut-shaped magnetic field accelerates the propellant in the "Primary Magnetic Acceleration Zone".

The propellant shoots out the exhaust nozzle with an exhaust velocity between 15, to 80, meters per second I sp of 1, to 8, seconds in laboratory test rigs. More research has to be done to figure out what the specific impulse will be in practical engines. Current design has the cathode 3 centimeters in diameter and 10 cm long. The anode has a 12 cm inner diameter. The propellant is argon gas. Potassium metal can also be used, but there is a concern that some of the potassium exhaust could be electrostatically attracted to the rear of the spacecraft, there to plate out over various surfaces and cause short circuits.

All die. Oh, the embarrassment. Ion drives are electro static engines. They use the use the Coulomb force to accelerate the propellant. As a baseline the report assumed use of the J-series 30 cm ion thrusters with mercury propellant, since it has been studied for 15 years. Isp is 4, seconds 4, needed for Mars mission , thrust 0. The thrust needs to be improved. Thruster consists of a cathode, an anode, a cylindrical discharge chamber, magnets in the chamber, and a set of closely spaced grids downstream of the cathode and propellant injection.

Thrust is created by a propellant ion beam accelerated by the large electric field between the screen and the acceleration grid. A cathode beam neutralizer makes the ion beam exhaust electrically neutral. Otherwise the engine and the ship would develop such a negative electrical charge that the postively charged ion beam would refuse to leave the engine.

It is an 8. It will easily supply the 6 MW e demanded by the power-glutton electrical engines, and have an ample 1. Other Mars missions have miserly life support power budgets measured in kilowatts.

Components are:. The Rotating bubble membrane radiator is a clever hybrid design with the advantages of both heat pipes and liquid droplet radiators , and amazingly the disadvantages of neither. It has the high surface heat fluxes and operating temperatures of heat pipes, along with the low mass associated with droplet radiators.

It operates quite well in freefall. And it can be made resistant to meteorite strikes. The hot fluid is ejected from the central spray nozzle in all directions as a combination of droplets and vapor. The hot droplets and gas condense on the spherical radiating surface, transferring the heat to the surface by both convection and radiation.

The radiating surface rejects the heat as infrared waves into the depths of space. The external surface can be coated in anti-meteorite armor which is transparent to infrared probably thermally transparent ceramic fabric.

The spherical surface is rotating on the rotating platform. This give the sphere spin gravity. Ordinarily the cool working fluid on the sphere interior would float around aimlessly in free fall. The spin gravity drags the fluid down into the return pump collection trough at the spin equator.

As the fluid travels to the trough it gives up even more heat to the sphere by convection. This is from A low-alpha nuclear electric propulsion system for lunar and Mars missions It describes a more advanced version of the Pegasus Dr. Coomes described in the report and the report. It used a 10 megawatt electrical power system 10 MW e.


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Though it kills the user, this is actually a logical tactic for those willing to expend their lives ; the more accurate an explosive device is, the more likely it is to accomplish its goal, and how much closer do you get than right next to the target? A common variation is the enemy that won't commit suicide other than trying to attack you in the first place , but will detonate violently upon death or defeat see Last Ditch Move and Dead Man's Switch. If the user is expendable enough , he'll die. If the user is special or a hero, expect to see him either have it as a Dangerous Forbidden Technique that will one day get him Killed Off for Real , or resurrected and re-deployed ad infinitum.

Real words! They're so much easier.:peach: as much as I want to:running: from these cartoons, I.

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Robert Krulwich. Updated July 18, We have added an update to this post, which you can find below the original. Click here to read about what happened to the men. They weren't crazy. They weren't being punished. All but one volunteered to do this which makes it all the more astonishing. On July 19, , five Air Force officers and one photographer stood together on a patch of ground about 65 miles northwest of Las Vegas. They'd marked the spot "Ground Zero.

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This content can also be viewed on the site it originates from. Late one afternoon this past August, Shakira heard banging on her front gate. Outside were two men in bandoliers and black turbans, carrying rifles. They were members of the Taliban, who were waging an offensive to wrest the countryside back from the Afghan National Army. The family crossed an old footbridge spanning a canal, then snaked their way through reeds and irregular plots of beans and onions, past dark and vacant houses.

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Two brilliant scientists, who dragged India into the modern era, but without ever having had the feat be subject to the emotional and political costs of persistent innovation. Rocket Boys is about two brilliant scientists who dragged India into the modern era without ever having had the feat be subject to the emotional and political costs of persistent innovation. While the pragmatic Homi Jim Sarbh thinks creating an atomic bomb will save India from future attacks, the Gandhian Vikram Ishwak Singh cannot imagine another Hiroshima-like happening. Sometimes at odds yet often warm, the evolving relationship between the khadi-clad Vikram and suited-up Homi paints an arresting picture of how passion and patriotism co-existed in various shades through this period. For a story based on real science, the series does a good job of visualizing and explaining technical details to a layperson in a cinematic way.

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In its sixth decade of operational service, the B continues to be a major contributor to U. The Boeing B primarily provides the United States with immediate nuclear and conventional global strike capability. The B is the most combat capable bomber in the U. Due to its high mission-capable rate, large payload, long range, persistence and ability to employ both nuclear and conventional precision standoff weapons, the B continues to be a critical contributor to the U. National Security Strategy. B Engineering Sustainment Program provides engineering services to maintain the operational effectiveness of the B Weapon. The current 70,pound 31, kg payload capacity will soon receive an upgrade that enables the B to carry 50 percent more smart bombs.

“Mere workers ki zindagi koi laboratory ka prayog nahi, ki hum ek baar fail creating an atomic bomb will save India from future attacks.

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Contains ads In-app purchases. Everyone info. Blast into a new Angry Birds puzzle adventure game! The birds are trapped inside balloons, and you can bet the pigs are behind it all.

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I pride myself on being good at expressing myself in words and even video. But I'm ashamed of how bad I am at writing in emoji. Trying to decipher all these tiny pictures feels like rocket science. Have you understood any of this article so far, or is it just frustrating? Is this really the future of digital communications?

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Nuclear explosion. Atomic bomb in the city. Symbol of nuclear war, end of world, dangers of nuclear energy.

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  1. Nikalus

    I do not agree with what is written in your first paragraph. Where did you get this information from?

  2. Yusef

    Another option is also possible

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