{"id":31940,"date":"2019-03-30T12:00:00","date_gmt":"2019-03-30T12:00:00","guid":{"rendered":"https:\/\/astronautix.com\/?astx_entry=yf-2a"},"modified":"2026-10-22T18:44:12","modified_gmt":"2026-10-22T18:44:12","slug":"yf-2a","status":"publish","type":"astx_entry","link":"https:\/\/astronautix.com\/y\/yf-2a.html","title":{"rendered":"YF-2A"},"content":{"rendered":"\n<p>Beijing Wan Yuan Nitric acid\/UDMH rocket engine. Out of production. Used on CZ-1, CZ-1C, CZ-1D, CZ-1M. First flight 1969.<\/p>\n<p><em>Thrust (sl):<\/em> 275.300 kN (61,890 lbf). <em>Thrust (sl):<\/em> 28,073 kgf. <em>Chamber Pressure:<\/em> 71.00 bar. <em>Area Ratio:<\/em> 10. <em>Thrust to Weight Ratio:<\/em> 0. <em>Coefficient of Thrust vacuum:<\/em> 1.50569884121406. <em>Coefficient of Thrust sea level:<\/em> 1.36485377079152.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Beijing Wan Yuan Nitric acid\/UDMH rocket engine. Out of production. Used on CZ-1, CZ-1C, CZ-1D, CZ-1M. First flight 1969.<\/p>\n","protected":false},"template":"","meta":{"inline_featured_image":false,"bs_cache_bypass_cache":0},"astx_kind":[13],"astx_nation":[53],"astx_family":[14],"class_list":["post-31940","astx_entry","type-astx_entry","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_entry\/31940","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_entry"}],"about":[{"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/types\/astx_entry"}],"wp:attachment":[{"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/media?parent=31940"}],"wp:term":[{"taxonomy":"astx_kind","embeddable":true,"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_kind?post=31940"},{"taxonomy":"astx_nation","embeddable":true,"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_nation?post=31940"},{"taxonomy":"astx_family","embeddable":true,"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_family?post=31940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}