{"id":487,"date":"2007-05-20T11:25:54","date_gmt":"2007-05-20T11:25:54","guid":{"rendered":"http:\/\/www.jpyro.com\/wp\/?p=487"},"modified":"2007-05-20T11:25:54","modified_gmt":"2007-05-20T11:25:54","slug":"hdpe-mortars-for-electrically-fired-displays","status":"publish","type":"post","link":"https:\/\/www.jpyro.co.uk\/?p=487","title":{"rendered":"HDPE Mortars for Electrically Fired Displays"},"content":{"rendered":"<p align=\"left\">When firing by hand, the problems of steel mortars can easily be over-looked. However, even for relatively small electrically fired displays, steel mortars and the usual alternatives (paper and PVC mortars) have limitations that are difficult to cope with. Steel mortars are heavy; when several hundred may be needed for a show, their weight can easily exceed 5000 pounds. This may necessitate the use of a large truck and must certainly be seen as undesirable by the crew that will need to handle them several times. Service life is long, but high initial cost (about $1\/pound) is another problem. Finally, even though steel mortars are quite strong, there is the possibility that a shell detonation may cause the production of dangerous mortar debris.<\/p>\n<hr \/>\n<p><strong>Ref:<\/strong> Selected Pyrotechnic Publication of K.L. and B.J Kosanke, Part 1, (1981-1989), pp 80-84<br \/> (K1_80)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When firing by hand, the problems of steel mortars can easily be over-looked. However, even for relatively small electrically fired displays, steel mortars and the usual alternatives (paper and PVC mortars) have limitations that are difficult to cope with. Steel mortars are heavy; when several hundred may be needed for a show, their weight can &hellip;<br \/><a href=\"https:\/\/www.jpyro.co.uk\/?p=487\" class=\"more-link pen_button pen_element_default pen_icon_arrow_double\">Continue reading <span class=\"screen-reader-text\">HDPE Mortars for Electrically Fired Displays<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[36,29],"tags":[],"_links":{"self":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/487"}],"collection":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=487"}],"version-history":[{"count":0,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/487\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}