D'un blast américain d'un carreau à 7 km de distance à une mini arbalète non moins véloce

Le railgun américain:


http://www.popsci.com/technology/article/2011-04/video-railgun-blasts-aerodynamic-round-seven-kilometers-through-steel-plate

Ce machin de mort est capable de tirer un projectile d'une manière très précise à 7km ... aucune idée de la vitesse, mais ça doit être véloce ;)

En vidéo plus bas donc, à la mini arbalète qui doit aussi être dangereuse cf


http://www.geekologie.com/2011/04/mini-crossbow-mega-funbow-home.php

et aussi en vidéo plus bas.

Railgun:

Arbalète

Crédits arbalète:

 | Créé le : 17 avril 2011

I built it entirely out of solid sterling silver and 22k gold (except the bow itself and the string which are made of steel).
It is all handmade and is an original design.
Although it is intended as a high-quality jewelry piece, it functions quite well as a miniature weapon and is able to inflict significant damage.

This miniature crossbow works in exactly the same way as the common full-size hunting crossbow, but in terms of power to weight ratio, the mini crossbow is almost 4X stronger.

It shoots three types of handmade aluminum arrows:
1. Basic (steel-tipped) arrows
2. Ramming arrows
3. Flare arrows

It took me many hours and countless experiments to build and perfect this mini-crossbow and its arrows. Every part was tested and modified countless times until the optimal technical and ergonomic level was reached, as well as becoming a thing of beauty. 
The mini-crossbow was much harder to build than the mini-cannon which appears in my previous videos.

This is one of the world's smallest crossbows. 

Detailed information on crossbows can be found at wikipedia:
http://en.wikipedia.org/wiki/Crossbow

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