Cengine hack

This is bad news. Various internal profiles have been tested, but most common these days is a multi-pointed star shape, which when used with inhibitor compounds mixed in the grain, allows the thrust to be accurately controlled.

You can see for yourself the mach diamonds in the exhaust plume which is nice due to the supersonic flow being marginally over-expanded. The question of whether 3D printed fuel grains are viable was posed on space stack exchange a few years ago, which was an interesting read.

Turbochargers as used on cars bear some similarities with jet engines. Fundamentally, both contain a turbine that harvests energy from hot gas, using it to spin a compressor which sucks in fresh air for combustion. Thus, turning a turbocharger into a jet engine is entirely possible, and [HRom] decided to have a crack at it.

The build starts with a turbo that appears to have been used on a diesel engine from the Volkswagen group. The first step was to cut the integral exhaust manifold off the turbo housing. A combustion chamber is then added which takes in fresh air from the compressor housing, and delivers hot combustion products to the turbine inlet.

The homebrewed jet engine burns propane as fuel, introduced into the chamber via a nozzle. The initial test failed as combustion was occurring at the turbine exhaust rather than in the combustion chamber, likely due to the lack of a proper ignition source inside the combustion chamber.

A redesign employed a bigger combustion chamber built out of a fire extinguisher, with smouldering wood pellets inserted inside to get the injected propane burning. The redesign works, and the turbocharger jet engine releases a thunderous scream as it turns at ever-increasing speed. However, with no oiling system or any way of controlling air or fuel flow in the engine, it eventually stops in a huge puff of smoke.

Regardless, the engine did run in a sustained manner even if the ignition method was rudimentary. They are incredibly cool, however, and a great way to learn the basic principles of how jet engines work. Video after the break. However, [Integza] noted that using the right techniques, it was possible to 3D print parts that could handle steam heat without failing.

Thus, the natural progression from there was to build a piston-type steam engine. Resin prints are key here, as the melting point of such parts is much higher than that of those turned out by typical FDM printers. To make such an engine work, valves are required to allow steam to flow into alternating sides of the piston to let it reciprocate continuously. Tested on compressed air and steam, the engine ran continuously, chugging away enthusiastically. However, steam performance was compromised by the low pressure output of just 1.

However, it suggests that with a better supply of steam, the printed steamer could indeed run for some time. For a long time radial aircraft engines, with their distinctive cylinder housings arranged in a circle, were a common sight on aircraft.

As an experiment, [KendinYap], wanted to see if he could combine 3 small DC motors into a usable RC aircraft motor, effectively creating an electric radial engine.

A 3D printed conical gear is attached to each motor shaft, which drives a single output gear and shaft mounted in the center with two bearings. The gear ratio is A variety of propellers can be mounted using 3D printed adaptors. As a baseline, [KendinYap] tested a single motor on a scale with a 4. Once integrated into the engine housing, the three motors produced g of thrust at RPM, with a larger propeller.

Three independent motors and propellers should theoretically provide g of thrust, so there are some mechanical losses when combining 3 of them in a single assembly. However, it should still be capable of powering a small RC plane.

Hackers can give it a name that looks like it belongs to the local establishment. People sign into it thinking they are signing into public Wi-Fi. The app then logs all data transmitted over the internet by the people signed into it. If they sign in to an account using a username and password over an unencrypted connection, the app will store that data and give the hacker access. To avoid becoming a victim of this heist, avoid using public Wi-Fi.

If you must use public Wi-Fi, check with the owner of an establishment to make sure you are signing in to the correct internet access point. Check that your connection is encrypted by looking for a padlock in the URL. You can also use a VPN. Get super-user privileges. Most information that will be of vital interest is protected and you need a certain level of authentication to get it.

To see all the files on a computer you need super-user privileges—a user account that is given the same privileges as the "root" user in Linux and BSD operating systems.

For routers this is the "admin" account by default unless it has been changed ; for Windows, this is the Administrator account. There are a few tricks you can use to gain super-user privileges: Buffer Overflow: If you know the memory layout of a system, you can feed it input the buffer cannot store. You can overwrite the code stored in the memory with your code and take control of the system. The program will be executed as a different user super-user for example. Create a backdoor.

Once you have gained full control over a machine, it's a good idea to make sure you can come back again. To create a backdoor, you need to install a piece of malware on an important system service, such as the SSH server. This will allow you to bypass the standard authentication system. However, your backdoor may be removed during the next system upgrade. An experienced hacker would backdoor the compiler itself, so every compiled software would be a potential way to come back. Don't let the administrator know that the system is compromised.

Don't make any changes to the website. Don't create more files than you need. Do not create any additional users. Act as quickly as possible. If you patched a server like SSHD, make sure it has your secret password hard-coded. If someone tries to log in with this password, the server should let them in, but shouldn't contain any crucial information. You can, but command prompt is not the best option. Consider Linux terminal instead as you could use and install tools that could help.

Perhaps even consider running Linux as a bootable USB or virtual machine. Not Helpful Helpful Why are you telling people how to do something that could be illegal? We have a bad enough hacking problem as it is. Not all hacking is illegal. The writer is trusting that the people with this information will not do anything illegal. Also, hacking isn't always a "problem. Sure, you can code malware in Ruby, password cracker in Python, buffer overflows in C, but you need to understand the logic behind it.

The logic is all yours and that is what is important. So, forget about learning coding, first learn how to think logically to exploit the gaps, insecurities and lazy errors. Do you know how to code? If not, start with that. Otherwise, read blogs about hackers, try to find a new bug in the software. There will be a screen that says "OS X Utilities". Go up to the Utilities toolbar and click on "Terminal".

Type in "resetpassword" and a screen will come up saying which hard drive the user whose password you want to reset is on. Just select your internal hard drive then select the account you want to change. Type in a new password write it down!

Just restart your computer and you should be able to login to your account with the password you created. If your Mac is running Snow Leopard or below, just use the restore disk that came with your computer.

Not unless you want to be what hackers refer to as "script kiddies. This may seem daunting but you get out whatever effort you put in. Not Helpful 97 Helpful What if you don't know any coding or anything specific? How will I know if someone is hacking into you? Notice any changes. Look for new suspicious files and check your browser history. Also consider running your antivirus.

You can try an app called Sololearn or go to codeacedemy or khanacedemy or W3schools online. Not Helpful 47 Helpful Instead of books, you can use websites like Sololearn or W3schools. Not Helpful 37 Helpful It depends on your determination and skill. It could take between a few months and a few years. Not Helpful 32 Helpful Include your email address to get a message when this question is answered.

Unless you're an expert or a professional hacker, using these tactics on a popular corporate or government computer is asking for trouble. Keep in mind there are people a bit more knowledgeable than you who protect these systems for a living. Once found, they sometimes monitor intruders to let them incriminate themselves first before legal action is taken. This means you might think you have free access after hacking into a system, when in fact, you're being watched and may be stopped at any moment.

Helpful 1 Not Helpful 0. Hackers are those who built the Internet, made Linux, and work on open-source software. It's advisable to look into hacking as it's quite respected and requires a lot of professional knowledge to do anything serious in real environments.

Helpful 0 Not Helpful 0. Keep in mind, if your target is not doing their best to keep you out, you won't ever become good.

Of course, don't get cocky. Don't think about yourself as the best of the best. Make this your goal: you must become better and better. Every day that you didn't learn something new is a wasted day. You are all that counts. Become best, at any cost. There are no half-ways. You must give fully of yourself. As Yoda would say, "Do or do not. There is no try. There is a major difference between a hacker and a cracker.

A cracker is motivated by malicious namely: earning money reasons, while hackers attempt to retrieve information and gain knowledge through exploration - "bypassing security".

Don't delete entire logfiles. Instead, just remove only the incriminating entries from the file. The other question is, is there a backup log file? What if they just look for differences and find the exact things you erased?

Always think about your actions. The best thing is to delete random lines of the log, including yours. Helpful 4 Not Helpful 0. Never do anything just for fun. Remember it's not a game to hack into a network, but a power to change the world.

Don't waste that on childish actions. Helpful 10 Not Helpful 3. If you aren't confident with your skills, avoid breaking into corporate, government, or military networks.

Even if they have weak security, they could have a lot of money to trace and bust you. If you do find a hole in such a network, it's best to hand it to a more experienced hacker that you trust who can put these systems to good use. Helpful 7 Not Helpful 2. This article is intended to be informational and should only be used for ethical - and not illegal - purposes. Helpful 3 Not Helpful 0. Be extremely careful if you think you have found a very easy crack or a crude mistake in security management.

A security professional protecting that system may be trying to trick you or setting up a honeypot. Helpful 4 Not Helpful 3. Hacking into someone else's system may be illegal, so don't do it unless you are sure you have permission from the owner of the system you are trying to hack and you are sure it's worth it. Otherwise, you will get caught. Helpful 2 Not Helpful 2. Although you may have heard the opposite, don't help anyone patch their programs or systems.

This is considered extremely lame and leads to being banned from most hacking communities. If you would release a private exploit someone found, this person may become your enemy.

This person is probably better than you are. Helpful 1 Not Helpful 1. You Might Also Like How to. How to. About This Article. Co-authored by:. Co-authors: Updated: January 6, Article Summary X 1. Italiano: Hackerare. Deutsch: Einen Computer "hacken". Bahasa Indonesia: Meretas. Nederlands: Hacken. Thanks to all authors for creating a page that has been read 10,, times. Hacking isn't always a a notorious play, it may be many times a knowledge giving act also.

Hacking isn't learned, it is practiced daily. More reader stories Hide reader stories. Is this article up to date? Cookies make wikiHow better. By continuing to use our site, you agree to our cookie policy. Pranav Sharma Dec 27, Andrea P. Jun 6, I may add, I have been trying to code, but it is hard doing it alone at home with the sites I have found.

Ahishakiye Obed Sep 17, I appreciate this so much. I always had dreams about computers but when it comes to hackers, I always respect them and I wish everyday that I can be like them.

Thanks again. Be blessed. Adrien Etienne-Perraudin Mar 24,