Tip 1: What are the planes of the invisible

Hi-tech

Tip 1: What are the planes of the invisible

All stealth planes use technology,which include a special form of fuselage, coating, materials and much more. All this allows the aircraft to be invisible to enemy radar. The development of technology began during the Second World War and has been going on for more than fifty years.

How to achieve secrecy

To achieve stealth, a combination ofdifferent methods. This does not allow the radar waves to reflect off the aircraft and return to the radiation source. The most difficult way is to use the effect of continuous curvature. Most of the surfaces of invisible aircraft are rounded and have a variable radius of curvature. Thus, the rays from the radar diverge in all directions, and not the source of the signal. Such designs do not have right angles. In order to calculate the radius of curvature and the scattering of radar beams, which it will provide at any point in the three-dimensional space, enormous computing power is required. The first aircraft built using this technology is the B-2 bomber. It is also known as the "Flying Wing". Since the development of computer and software technology has been rapid over the past 20 years, the shape of the design can now be calculated with great accuracy. At the same time, the program will take into account the coefficient of radar reflection of the aircraft, offering more successful aerodynamic forms.

Saw-shaped corners

Invisible aircraft must have a small areafrontal resistance. This cross-section provides a small lateral visibility. Paints and materials, as well as a shape in the form of the letter "W" help to achieve this effect. Elements of this form are present in many structural parts of stealth aircraft.

Engine Nozzles

The decrease in the cross-section of the nozzles is also veryimportant. This problem is complicated by the high temperatures under which the parts are exposed. One possible approach is the use of ceramic materials. They can be either in the form of light sheets, installed instead of the usual elements of nozzles, or heavy construction materials that create uneven edges.

The cockpit

The head of the pilot in the helmet is one of the mainsources of radar signal. This effect is enhanced by internal bulkheads and frame elements. The solution to this problem is to develop such a cab so that its appearance is consistent with the principle of radar invisibility. Then the glass is covered with a film to control the internal temperature. Requirements for materials are very strict. Samples should absorb 85 percent of the heat energy and reflect all signals.

Conclusion

Reduction of infrared radiation caused byexhausts of engines and other parts of the aircraft, should also be taken into account in the design. However, not all ghost aircraft are completely invisible to radar. Even the best aircraft can be detected using a low-frequency radar.

Tip 2: What is an invisible lock

The term "invisibility lock" unites a group of locking devices hidden in the door. On the outside of the door, it is impossible to detect such a lock, it does not have a keyhole.

Why do we need locks-invisible

The main function of any lock is to securely closedoor from uninvited guests. To the usual mechanical lock, any thief-burglar has a master key, it is also not necessary to look for such a lock (keyhole in sight). In a few minutes it will be opened, which means that the robber will penetrate the premises and take away what he came for. In the case of the invisibility lock, the thief should take care not only of how to open the lock, but also to find out where he is in the door.

Management of invisibility locks

The question arises, how does the owner get himselfhome if there is no keyhole? The fact is that outside these devices are opened mainly by radio control, as in car alarms. The lock is built, for example, GSM-module, it has a SIM-card, as in a mobile device. For such locks, it is possible to control through the telephone. It is required to make a call to the phone number of the SIM-card in the lock and, if such number is added to its phone book to the list of allowed ones, then the specified action (unlocking, locking the door) takes place. The disadvantage is that you can lose, break the phone or it can be stolen, and with it the lock number. Another option is more popular and convenient - you need to attach a keychain, like in a doorphone. In case the keyfob is lost, the owner himself can reprogram the spare key chains in a new way so that the finder can not use the old one. Installers when installing the door will only show how to program the key, to open the lock with their keys they can no longer. In any case, such a lock opens from the inside even without a key to ensure fire safety.

Installation and operation

Ideally, if the door initially containssuch a lock, because in the case of installation on an existing door, technical difficulties may arise due to the mismatch of the structures. The reliability of protection will be maximized if there is a hidden and mechanical lock in the door. For the operation of the invisibility lock, an electrical network is required. Naturally, in real life the network does not work without interruptions, therefore locks are equipped with an uninterruptible power supply, capable of providing autonomy and independence from external power supply for up to two weeks. When choosing a manufacturer, you should not save, because reliability is important in the work. It is recommended to check the product certificate, inspect the appearance, familiarize yourself with the operation features before installation and purchase.

Tip 3: How to make clasps of polymer clay

Polymer clay is a pliable material, fromwhich can make different original products. Beginners should start with something simple, for example, try to make of ordinary invisible and polymer clay beautiful hair clips.

You will need

Hairpins-invisible, glue, polymer clay, a piece of dense tissue.

Instructions

Take the polymer clay of the color you need, roll a small ball out of it, then crush it with your fingers to make a circular plate.

Pinch the edge of the plate to make a floral petal. Make thus the right amount of petals.

Now connect all the petals to each other. If you took a scorched clay, then bake the resulting flower to make it hard. Stick a flower on a piece of cloth, and the fabric is already on the invisible itself.