{"id":56937,"date":"2026-03-23T10:41:30","date_gmt":"2026-03-23T10:41:30","guid":{"rendered":"https:\/\/bis-space.com\/shop\/?post_type=product&#038;p=56937"},"modified":"2026-04-21T14:04:05","modified_gmt":"2026-04-21T13:04:05","slug":"jbis-079-01-0012","status":"publish","type":"product","link":"https:\/\/bis-space.com\/shop\/product\/jbis-079-01-0012\/","title":{"rendered":"On Pressures in the Liquid Propellant Rocket Engine Part II: An Experimental Review"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"<p class=\"p2\"><b>Panu Bieneck<\/b><b><\/b><\/p>\n<p>2026.079.0012<\/p>\n<p class=\"p1\"><b>DOI <a href=\"https:\/\/doi.org\/10.59332\/jbis-079-01-0012\">https:\/\/doi.org\/10.59332\/jbis-079-01-0012<\/a><\/b><\/p>\n<p class=\"p1\">In this final part of the series of articles, the equations derived in Part I are compared with experimental results from Ref. [2], whose data is re-used and re-analysed in light of the theoretical framework presented in Ref. [4]. Using proportionality and regression analyses, key performance quantities are examined as functions of chamber and feed pressure. A consistent pattern emerges: optimal engine performance occurs when the pressure ratio <span class=\"s1\"><i>p<\/i><\/span><span class=\"s2\"><i>f<\/i><\/span><i>\/ <\/i><span class=\"s1\"><i>p<\/i><\/span><span class=\"s2\"><i>c <\/i><\/span>reaches a minimum, coinciding with maxima in specific volume and characteristic velocity. This observation supports the theoretical prediction that <span class=\"s1\"><i>p<\/i><\/span><span class=\"s2\"><i>f<\/i><\/span><i>\/ <\/i><span class=\"s1\"><i>p<\/i><\/span><span class=\"s2\"><i>c <\/i><\/span><i>&gt; <\/i>1 is a necessary condition for LPRE operation. The historical ARS data, though rarely cited, offers sufficient resolution to validate the model with high probability. The findings suggest that <span class=\"s1\"><i>p<\/i><\/span><span class=\"s2\"><i>f<\/i><\/span><i>\/ <\/i><span class=\"s1\"><i>p<\/i><\/span><span class=\"s2\"><i>c <\/i><\/span>may serve as a fundamental design parameter for LPREs and warrant renewed research using modern instrumentation.<\/p>\n<p class=\"p1\"><b>Keywords: <\/b>Liquid Propellant Rocket Engine, Chamber Pressure, Feed Pressure, Novel Calculation Method, Specific Volume<\/p>\n","protected":false},"featured_media":56875,"template":"","meta":[],"pwb-brand":[],"product_brand":[],"product_cat":[3911],"product_tag":[],"class_list":["post-56937","product","type-product","status-publish","has-post-thumbnail","product_cat-2026-papers","first","instock","downloadable","virtual","purchasable","product-type-simple","czr-hentry"],"jetpack_sharing_enabled":true,"brands":[],"_links":{"self":[{"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product\/56937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/media\/56875"}],"wp:attachment":[{"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/media?parent=56937"}],"wp:term":[{"taxonomy":"pwb-brand","embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/pwb-brand?post=56937"},{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product_brand?post=56937"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product_cat?post=56937"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product_tag?post=56937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}