{"id":342,"date":"2014-08-25T13:47:22","date_gmt":"2014-08-25T17:47:22","guid":{"rendered":"http:\/\/jimlund.org\/blog\/?p=342"},"modified":"2014-08-25T13:47:22","modified_gmt":"2014-08-25T17:47:22","slug":"getting-to-orbit","status":"publish","type":"post","link":"https:\/\/jimlund.org\/blog\/?p=342","title":{"rendered":"Getting to orbit"},"content":{"rendered":"<p><strong>Hybrid balloon \/ vehicle approaches<\/strong><\/p>\n<p>Saw a recent news item about  JP Aerospace.  They are working on a two step to orbit approach.  The basic plan is to put a large lighter than air (LTA) craft at 200,000 ft, and then accelerate it using a ion thruster to reach orbital velocity.<\/p>\n<p>So I was interested in how this would work, and what the basic parameters (mass, thrust, time) are for approaches of this type.<\/p>\n<p>The benefit of starting from a high altitude is very low air pressure.  A balloon can provide steady support so a low thrust vehicle has time to accelerate.<\/p>\n<p>Orbital velocity is roughly 9500 m\/s.<\/p>\n<p>What size solid fuel rocket would be required to put a 10 kb payload into orbit?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hybrid balloon \/ vehicle approaches Saw a recent news item about JP Aerospace. They are working on a two step to orbit approach. The basic plan is to put a large lighter than air (LTA) craft at 200,000 ft, and then accelerate it using a ion thruster to reach orbital velocity. So I was interested [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-342","post","type-post","status-publish","format-standard","hentry","category-science"],"_links":{"self":[{"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/342","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=342"}],"version-history":[{"count":0,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/342\/revisions"}],"wp:attachment":[{"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=342"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=342"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}