Perlan, Close-Up Engineering

    Perlan II: a glider for the study of ozone hole

    The current environmental issues necessitates experiments that show the chemical reactions due to the ozone hole and global warming. You have to reach the stratosphere to understand the reasons that lead one of three oxygen atoms that form ozone to react with CFCs remaining attached to the molecules of chlorine and fluorine for over 50 years because these reactions occur here.

    Flyboard Jetpack

    Flyboard, the water jet pack

    Who has not dreamed of whizzing at full speed, suspended in the middle-air over the water? Now it’s possible thanks to Flyboard, a device attached to a watercraft, that allows the propulsion in the air and underwater.

    The Flyboard is a bolt on device that is attached to a jet ski and requires proper instructions and safety gear before being able to use the product successfully and efficiently. The PWC is powered from 100 horse power and up and follows the rider, permitting the freedom to go anywhere, even underwater. The thrust that comes from the PWC is run through a 180 degree adapter (which allows the rider to divert and control the device in any desired motion) and then goes into the hose that is 4 inches in diameter and roughly 55 feet long and has capabilities of putting the pilot above water 35 feet or below water 35 feet.

    The hose is attached in a way so that the PWC follows behind the rider’s trail allowing the rider all types of freedom even allowing the rider to go under water if they desire. The pilot that is on the Flyboard is in complete control of the navigation while the throttle is controlled by the person in charge of the PWC. The pilot on the Flyboard is secured in by bindings similar to a wakeboard and the rider is propelled from water jets below the device. There are certain rules that one must go by when purchasing a Flyboard though. The Flyboard is buoyant for safety, which also allows the rider to rest in the water between rides if the rider happens to get fatigued. The use of a personal flotation device and helmet is recommended for safety purposes.

    Two versions of the Flyboard exist: the Flyboard Standard Kit and the Flyboard Pro Rider Kit. The former is a board with hand-held stabilizers, which was the original design. The latter dispenses with the stabilizers.

    Device power is controlled by a throttle on the PWC. The equipment may be used in two modes: the primary one requires two people, one to control the PWC throttle which regulates the power and height of the rider. The secondary mode relies on an accessory called an Electronic Management Kit (EMK) which allows the rider to control the jetski throttle.

    ariane5, aerospace.closeupengineering

    Ariane 5: a success for Avio

    The launcher, developed and built, under authorization from the European Space Agency, by EADS SPACE Transportation, started from the European Space Centre in Kourou (French Guyana) with the primary purpose of placing satellites in geostationary orbit.


    Graphene, a material for the future

    For some time we talk about Graphene, but now it seems that something is happening for real.

    10 years after the discovery of this revolutionary material by the two Russian researchers (Andre Geim and Kostya Novoselov, for which they won the Nobel Prize in 2010), the graphene is still the ‘only material in two dimensions, the thinnest ever created (in addition to being the most resistant) and obtainable from the same material it is made of a tip of pencil, graphite.

    But, how the two researchers obtained these thin layers of graphene?

    They took a graphite block and used a tape to remove small fragments of the mineral. Repeating the operation several times on the same fragments and pressing the adhesive tape on a silicon substrate, it was possible to obtain very thin layers, some of which, examined with a solution of sulfuric and nitric acid, showed a thickness of a single atom, or the same size that we get if we divide the section of a human hair 10,000 parties.

    What is the use of Graphene?

    “I dont know. It ‘s like to submit a piece of plastic to a man than a century ago and ask what you can do. A bit ‘of everything, I think “

    Andre Geim

    These are some of the many properties of graphene:

    • Mechanical strength 50 times higher than that of ‘steel;
    • More than twice the thermal conductivity of the diamond;
    • Density equal to half of ‘aluminum, and so dense that not even the’ helium, the smallest gas atom, can pass through it;
    • High acquiescence, or the ability to be shaped at will for any use without the risk of breaking it;
    • Resistant to changes in temperature and pH.

    Some of the fields of application of this material…

    • The “Massachusetts Institute of Technology” in the United States has carried out an experiment in reverse osmosis with graphene, reaching excellent results. The molecular structure of graphene allows you to create any size of the holes on its surface and for this reason it was possible to pass the ‘pure water on one side and salts from’ other. There ‘s nothing new in this experiment, only with the’ use of this material will be possible to have much smaller equipment, an energy cost equal to almost zero water filtration and water purification.
    • The combination of its mechanical properties with electric ones they can be used in electronics flexible and foldable, with the creation of devices that fold back on themselves, that you can roll up or put on your wrist. The electrons can travel in this material with a speed close to that of light, making it the replacement of copper in our computer. It is on this street, Intel and IBM are investigating solutions to solve the problem related to the technologies in silicon which, although superior to any other, they produce a high amount of heat. Graphene, therefore, for its outstanding thermal properties could solve these problems. In addition, the exceptional mobility of the charges, accompanied by appropriate architectural solutions, may allow the realization of ultra-low power transistors for portable applications such as mobile phones or PDAs, which could be recharged once a month, rather than at intervals of a few days, besides the fact that the batteries of mobile phones will be able to charge much more rapidly (it is estimated at around 15 minutes).
    • New solar panels are lighter and will be fully biocompatible carbon. Will be eliminated so the most fragile and expensive made ​​with indium-tin oxide, a material that is more and more difficult in our planet. There will also be more efficient, easier to recycle and consist of two solar cells sandwiched between two layers of graphene. The light passes through the graphene layers and hits the photovoltaic cell, with the result of generating electricity which is then transported from the graphene.
    • Its use must be from aviation (aircraft so lightweight that consume little fuel) to sports.

    What are the costs?

    The ‘international interest is too large, so that the’ European Union has financed one billion euro project to bring it on the market.
    Various techniques have been developed for the production of graphene, but at the moment there is no effective and inexpensive method for obtaining large sheets. It is estimated that the cost to produce one kilogram of graphene are around 30-35,000 Euros.

    Solar Impulse 2, a solar powered airplane

    Solar Impulse project is a four-engine high-wing ultralight aircraft, made in Switzerland, at the Federal Polytechnic of Lausanne. Primary characteristic is the ability to hover without fuel because solar powered.

    SpaceX Dragon V2, the first spatial taxi

    Presented in Los Angeles (California), what is called “the capsule of the 21st century”: Dragon V2. It is a spacecraft capable of carrying up to 7 astronauts with a high degree of reusability, a feature that may allow to lower the cost significantly.

    Cat 797

    Cat 797, the world’s largest truck

    Today we want to talk about trucks, but not in the way you understand it, we are talking about the largest tipping truck in the world, CAT 797.

    The vehicle, produced by the renowned company Caterpillar, weighs 225 tons and with a height of 7.59 meters, width 14.5 meters and width of 9.1 meters is the world’s largest truck.

    Its cost is around $ 3.5 million.

    It is used mainly in mineral deposits in America.

    With an output of 3550 hp manages to reach 65 km / h. Not bad when you consider that fully loaded weighs about 600 tons.

    Surprising thing is that it is impossible to assemble at the factory because the floor would not hold his weight and, despite wanting to, it would not pass through the doors. Installation is done on site and therefore anyone who wants this monster will have to wait a month for the assembly before using it.


    Vuoi leggere i nostri articoli senza pubblicità?

    Sostieni il nostro progetto e avrai la possibilità di: