![](\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/videos\/2018\/02\/hypervelocity_impact_testing\/17383948-4-eng-GB\/Hypervelocity_impact_testing_small.png\")
<\/p>\n\t\t\t\t\t<\/p>\n
\nAn 2.8-mm diameter aluminium bullet moving at 7 km\/s pierces through a candidate shielding for spacecraft, captured by a high-speed camera at Germany\u2019s Fraunhofer Institute for High-Speed Dynamics. \n<\/p>\n
\nThis light-gas gun testing took place to evaluate the shielding potential of various kinds of \u2018fibre metal laminates\u2019 (FML) \u2013 produced for ESA by GTM Structures BV \u2013 which are several thin metal layers bonded together with composite material.\u201d \n<\/p>\n
\nTo avoid micrometeorite object damage (MMOD) an onboard protection system is needed against small debris, typically consisting of one or more shields. An often-applied variant is the \u2018Whipple shield\u2019 \u2013 originally devised to guard against comet dust \u2013 with two layers, a bumper and a rear wall, with a mutual distance of 10 to 30 cm. \n<\/p>\n
\nThe high-speed video shows solid aluminium bullet breaking apart into a cloud of fragments and vapour, which becomes easier for the next layer to capture or deflect. <\/p>\n","protected":false},"excerpt":{"rendered":"
<\/p>\n
\nAn 2.8-mm diameter aluminium bullet moving at 7 km\/s pierces through a candidate shielding for spacecraft, captured by a high-speed camera at Germany’s Fraunhofer Institute for High-Speed Dynamics. \n<\/p>\n
\nThis light-gas gun testing took place to evaluate the shielding potential of various kinds of ‘fibre metal laminates’ (FML) – produced for ESA by GTM Structures BV – which are several thin metal layers bonded together with composite material.” \n<\/p>\n
\nTo avoid micrometeorite object damage (MMOD) an onboard protection system is needed against small debris, typically consisting of one or more shields. An often-applied variant is the ‘Whipple shield’ – originally devised to guard against comet dust – with two layers, a bumper and a rear wall, with a mutual distance of 10 to 30 cm. \n<\/p>\n
\nThe high-speed video shows solid aluminium bullet breaking apart into a cloud of fragments and vapour, which becomes easier for the next layer to capture or deflect. <\/p>\n","protected":false},"author":5,"featured_media":615444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-443147","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-multimedia"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/443147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=443147"}],"version-history":[{"count":1,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/443147\/revisions"}],"predecessor-version":[{"id":443148,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/443147\/revisions\/443148"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/615444"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=443147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=443147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=443147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}