{"id":29680,"date":"2019-03-30T12:00:00","date_gmt":"2019-03-30T12:00:00","guid":{"rendered":"https:\/\/astronautix.com\/?astx_entry=umpireconvair"},"modified":"2026-10-22T18:44:07","modified_gmt":"2026-10-22T18:44:07","slug":"umpireconvair","status":"publish","type":"astx_entry","link":"https:\/\/astronautix.com\/u\/umpireconvair.html","title":{"rendered":"UMPIRE Convair"},"content":{"rendered":"\n<p>American manned Mars expedition. Study 1964. Unfavorable Manned Planetary - Interplanetary Roundtrip Expedition profiles were studied under NASA Huntsville contracts to General Dynamics and Douglas in June 1963.<\/p>\n<p>The studies looked at manned Mars missions at unfavorable mission opportunities (e.g. 1975, 1977). Convair concluded that only conjunction class long-duration 800-1000 day missions were feasible at such opportunities.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>American manned Mars expedition. Study 1964. Unfavorable Manned Planetary - Interplanetary Roundtrip Expedition profiles were studied under NASA Huntsville contracts to General Dynamics and Douglas in June 1963.<\/p>\n","protected":false},"template":"","meta":{"inline_featured_image":false,"bs_cache_bypass_cache":0},"astx_kind":[48],"astx_nation":[5],"astx_family":[55],"class_list":["post-29680","astx_entry","type-astx_entry","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_entry\/29680","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=29680"}],"wp:term":[{"taxonomy":"astx_kind","embeddable":true,"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_kind?post=29680"},{"taxonomy":"astx_nation","embeddable":true,"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_nation?post=29680"},{"taxonomy":"astx_family","embeddable":true,"href":"https:\/\/astronautix.com\/wp-json\/wp\/v2\/astx_family?post=29680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}