{"id":3007,"date":"2025-10-30T20:18:11","date_gmt":"2025-10-31T01:18:11","guid":{"rendered":"http:\/\/jimlund.org\/blog\/?p=3007"},"modified":"2025-10-30T20:18:11","modified_gmt":"2025-10-31T01:18:11","slug":"hydrogen-zeppelin-balloon","status":"publish","type":"post","link":"http:\/\/jimlund.org\/blog\/?p=3007","title":{"rendered":"Hydrogen Zeppelin \/ balloon"},"content":{"rendered":"\n<p><strong>Density:<\/strong><br>0.08988 g\/L H2<br>1.2250 g\/L air<br><strong>Lift:<\/strong> 1.13512 kg \/ m3 <\/p>\n\n\n\n<p>Volume to lift 250 kg -> 220.4 m3<br><strong>220 m3:<\/strong><br>6 m diameter tube -> 7.8 m long<br>4.5 m diameter tube -> 13.9 m long<br>6.1 m cube<br>7.6 m sphere<br><br>Volume to lift 150 kg -> 132 m3<br>Wing with 1 m2 cross-section x 132 m long<br>Wing with 2 m2 cross-section x 66 m long<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Density:0.08988 g\/L H21.2250 g\/L airLift: 1.13512 kg \/ m3 Volume to lift 250 kg -> 220.4 m3220 m3:6 m diameter tube -> 7.8 m long4.5 m diameter tube -> 13.9 m long6.1 m cube7.6 m sphere Volume to lift 150 kg -> 132 m3Wing with 1 m2 cross-section x 132 m longWing with 2 m2 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3007","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3007"}],"version-history":[{"count":1,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3007\/revisions"}],"predecessor-version":[{"id":3008,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3007\/revisions\/3008"}],"wp:attachment":[{"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3007"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}