Privacy policy

Who we are
The main website address is:
What data we collect and why we collect it
When visitors leave comments on the site, we collect the data shown in the comments form and also the visitor's IP address and browser user agent string to help detect spam.
If you upload images to the site, avoid uploading images with embedded location data (GPS EXIF) included. Site visitors can download and extract any location data from images on the site.
Contact Forms
If you leave a comment on our site, you may choose to save your name, email address and website in cookies. These are for your convenience, so you don't have to fill in your details again when leaving another comment. These cookies will last a year.
If you have an account and log in to this site, we will set a temporary cookie to determine if your browser accepts cookies. This cookie contains no personal data and is discarded when you close your browser.
When you sign in, we will also set various cookies to save your login information and your on-screen display options. Login cookies last two days and screen options cookies last one year. If you select “Remember Me,” your login will persist for two weeks. If you sign out of your account, login cookies will be removed.
If you edit or publish an article, an additional cookie will be saved in your browser. This cookie does not include personal data and simply indicates the post ID you just edited. Expires after 1 day.
Content from other websites
Articles on this site may include embedded content (e.g., videos, images, articles, etc.). Embedded content from other sites behaves the same as if the visitor had visited the other site.
These sites may collect data about you, use cookies, incorporate additional third-party tracking, and monitor your interaction with embedded content, including tracking your interaction with embedded content, if you have an account and are connected to the site.
How long we keep your data
If you leave a comment, the comment and its metadata will be retained indefinitely. This is so that we can automatically recognize and approve any follow-up comments, rather than keeping them in a moderation queue.
For users who register on our site, we also store the personal information they provide in their user profile. All users can view, edit or delete their personal information at any time (except they cannot change their username). Site administrators can also view and edit this information.
What rights do we have over your data
If you have an account on this site or have left comments, you may request to receive an exported file of the personal data we hold about you, including any data you have provided to us. You may also request that you delete any personal data we have about you. This does not include any data that we are required to keep for administrative, legal or security purposes.


Ariane 6: How Slefty is Building Future in Space


There's a new rocket in Europe and it goes by Ariane 6.

It was given life by the European launch vehicles program  set in 2014. Its main purpose is to provide reliable and yet cost-efficient access to space for European Countries, clearing the need for public sector support.

The key element between the Ariane 5 and 6 is cost. There was a big effort in the vehicle studies to lower the costs, so it can be competitive against the latest competitors, like Space X.

Ariane 6 will have two variants, one with two boosters and the second one with four boosters (Ariane 62 and Ariane 64).

When equipped with two boosters it can develop a liftoff thrust of 800ton, but with 4 boosters the thrust is 1500ton. The P120C boosters that equip the Ariane 6 have 13,5m of length, 3,4m of diameter and take 144ton of propellant mass. The boosters are connected to the Lower liquid propulsion module,  composed of a single Vulcan 2.1 engine with a thrust of 137ton, burning liquid oxygen and liquid hydrogen.

The upper stage of the rocket has a Vinci engine with 18ton of thrust and 30ton of liquid oxygen and hydrogen. In the end, Ariane 6 will have a total height of 63 meters, 5,4 meters of diameter, a weight between 530ton and 860ton and can deliver payloads between 5ton and 21ton.

The European spaceport in French Guyana, South America, that already is the launching site of Ariane 5, will be also serve Ariane 6 after some adjustments are made.

The new vehicle will have its launch pad and extra buildings that will support assembly and inspections before the liftoff. There will be the new assembly facility, the new launch pad, the mobile gantry, the booster’s buildings EFF and BSB.

Slefty's working on the structural analysis of the EFF (ESR Finish Facility) and its integration with all the mechanical equipment’s. This building will be the one where the finishing of the floors of each P120C booster is done.

Maybe someday you'll travel to space with the help of our work! What would you like to do there? Leave us a comment below!

Lower Image Credits: ESA

Did you like this article? 0
Share this article