{"id":23259,"date":"2024-05-11T04:17:50","date_gmt":"2024-05-10T22:47:50","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=23259"},"modified":"2025-10-07T12:34:21","modified_gmt":"2025-10-07T07:04:21","slug":"ps4-engine","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/ps4-engine\/","title":{"rendered":"PS4 engine"},"content":{"rendered":"<h2>About PS4 engine:<\/h2>\n<ul>\n<li>It is the uppermost stage of <a href=\"https:\/\/vajiramandravi.com\/upsc-exam\/satellite-launch-vehicles\/#:~:text=Polar%20Satellite%20Launch%20Vehicle%20(PSLV,vehicle%20to%20have%20liquid%20stages.\" target=\"_blank\">Polar Satellite Launch Vehicle<\/a> (PSLV), comprising two Earth storable liquid engines.<\/li>\n<li>It uses a <strong>bipropellant combination<\/strong> of <strong>nitrogen tetroxide<\/strong> as the oxidizer and <strong>monomethyl hydrazine<\/strong> as the fuel, developed by Isro&#8217;s Liquid Propulsion Systems Centre.<\/li>\n<li>The same engine is also used in the <strong>Reaction Control System<\/strong> (RCS) of the first stage (PS1) of PSLV.<\/li>\n<li>ISRO redesigned the conventionally manufactured PS4 engine to make it compatible with additive manufacturing techniques and this innovative approach, known as <strong>Design for Additive Manufacturing<\/strong>, has yielded remarkable advantages.<\/li>\n<\/ul>\n<p><strong>What is Additive Manufacturing?<\/strong><\/p>\n<ul>\n<li>It is also known <strong>as <\/strong><a href=\"https:\/\/vajiramandravi.com\/upsc-exam\/3d-printing\/\" target=\"_blank\">3D printing<\/a> which is an emerging technology that is rapidly transforming manufacturing processes worldwide.<\/li>\n<li>It creates 3-dimensional objects by successively layering materials under computer control.<\/li>\n<li>It involves layering materials like plastics, composites, or bio-materials to create objects that range in shape, size, rigidity, and colour.<\/li>\n<li>Compared to traditional subtractive techniques, 3D printing offers immense design <strong>flexibility, reduced waste,<\/strong> and the ability to produce complex geometries.<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1: What is a Geosynchronous Satellite Launch Vehicle (GSLV)?<\/h3>\n<p>It is a space launch vehicle designed, developed and operated by the ISRO to launch satellites and other space objects into Geosynchronous Transfer Orbits (GTO).<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.newindianexpress.com\/states\/karnataka\/2024\/May\/11\/isros-engine-design-saves-raw-material-time\" target=\"_blank\" rel=\"nofollow noopener\"><u>ISRO\u2019s engine design saves raw material, time<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PS4 engine is the uppermost stage of Polar Satellite Launch Vehicle (PSLV), comprising two Earth storable liquid engines.<\/p>\n","protected":false},"author":5,"featured_media":23260,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-23259","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/23259","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=23259"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/23259\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/23260"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=23259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=23259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=23259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}