La technique des pailles consiste \u00e0 confectionner des tubes contenant de la poudre pour armes BA10 (poudre sans fum\u00e9e, \u00e0 base de nitrocellulose) et un dispositif de mise \u00e0 feu \u00e9lectrique (r\u00e9sistance en contact avec la poudre). Une paille, d\u2019une longueur de 23 cm, contient typiquement 8,3 grammes de poudre.<\/p>\n
La paille se place dans un trou de diam\u00e8tre 10 mm X 400 mm. Un bourrage, par exemple avec du papier humide, est obligatoire afin d’obtenir l\u2019explosion et non la combustion. La mise en oeuvre prend donc du temps compar\u00e9 au microblasting o\u00f9 le bourrage est plut\u00f4t inutile.<\/p>\nngg_shortcode_0_placeholder\n
Une d\u00e9monstration a montr\u00e9 que cette technique produit des blocs plut\u00f4t que la caillasse des explosifs brisants comme la penthrite. La mise \u00e0 feu de ces paille par l\u2019\u00e9chauffement d\u2019une r\u00e9sistance, a \u00e9chou\u00e9 avec un exploseur HU, de part la trop forte puissance instantan\u00e9e. Elle a ensuite r\u00e9ussi sans soucis avec un accu de perfo, la technique usuelle d\u2019allumage (?).<\/p>\n
La technique des pailles produit du CO, un gaz toxique. Cette production a \u00e9t\u00e9 mesur\u00e9e \u00e0 1500 ppm*m3\/paille. La concentration de CO est de 1500 ppm apr\u00e8s explosion dans un volume de dissolution de 1 m3. D’autres gaz toxiques sont probablement aussi produits.<\/p>\n
Cette technique est \u00e9videmment ill\u00e9gale<\/span> et je ne l’ai jamais utilis\u00e9e.<\/p>\n Alternative<\/span><\/strong><\/p>\n Une alternative consiste \u00e0 d\u00e9tourner des \u00ab\u00a0d\u00e9taupeurs\u00a0\u00bb. Ils se placent dans des trous de 10 mm de diam\u00e8tre et d’une longueur de 35 cm. Comme ci-dessus pour les pailles, Il est n\u00e9cessaire de bourrer le trou. Il est conseill\u00e9 d’utiliser de la plasticine (p\u00e2te \u00e0 modeler), bourr\u00e9e avec une tige en bois de 9 mm de diam\u00e8tre.<\/p>\n Les \u00ab\u00a0d\u00e9taupeurs\u00a0\u00bb peuvent \u00eatre amorc\u00e9s avec une pile de 4,5 Volts. ils sont donc tr\u00e8s sensibles (\u00e9quivalent \u00e0 des amorces A ?), ce qui induit un risque important de mise \u00e0 feu involontaire.<\/p>\nngg_shortcode_1_placeholder\n Sp\u00e9cifications de la charge du \u00ab\u00a0d\u00e9taupeur\u00a0\u00bb : Cette technique est aussi ill\u00e9gale.<\/p>\n Bibliographie :<\/span><\/strong><\/p>\n La technique des pailles consiste \u00e0 confectionner des tubes contenant de la poudre pour armes BA10 (poudre sans fum\u00e9e, \u00e0 […]<\/p>\n","protected":false},"author":1,"featured_media":3967,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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\n\u00b7 Diam\u00e8tre du p\u00e9tard : 8 mm.
\n\u00b7 Diam\u00e8tre de l’opercule : 10 mm.
\n\u00b7 Longueur du p\u00e9tard : 35 mm.
\n\u00b7 Longueur des fils : 300 mm.<\/p>\n\n