{"hash":"ab5d5270bf706690597ed185b6f6faf1","hash_type":"stream","id":"2531ae294cc256bbb9ede07f342382bb","delivered_at":"Wed, 27 May 2015 22:59:54 +0000","interactions":[{"interaction":{"author":{"id":15037660,"link":"http://leatherjacketandglasses.tumblr.com/","username":"leatherjacketandglasses"},"content":"trigonometry-is-my-bitch:\nA reaction wheel  is a type of flywheel used primarily by spacecraft for attitude control without using fuel for rockets or other reaction devices. They are particularly useful when the spacecraft must be rotated by very small amounts, such as keeping a telescope pointed at a star. They may also reduce the mass fraction needed for fuel. This is accomplished by equipping the spacecraft with an electric motor attached to a flywheel which, when its rotation speed is changed, causes the spacecraft to begin to counter-rotate proportionately through conservation of angular momentum.\nthough similar, it is not to be confused with a gyroscope.\nmother fucking science also kerbal space program taught me this\n\n","created_at":"Wed, 27 May 2015 22:59:10 +0000","id":"1e504c3fc23ba300828bea9db2b70575","link":"http://leatherjacketandglasses.tumblr.com/","media_type":"photo","received_at":1432767551.8027999,"schema":{"version":3},"subtype":"post","type":"tumblr","tags":["RFI_b0f9f201-a245-4ec9-ab4a-ed0e7e33169e_TERM_63568319268917"]},"language":{"tag":"en","tag_extended":"en","confidence":99},"salience":{"content":{"sentiment":2}},"tumblr":{"action":"create","activity":"post","blog":{"description":"Tom, 23, Cardiff UK, Post Grad studied Sound Engineering and Acoustic Design  -  This is my boring life.","id":"15037660","is_group_blog":false,"name":"leatherjacketandglasses","title":"A Perverted Human, Far From Perfect","url":"http://leatherjacketandglasses.tumblr.com/"},"blog_name":"leatherjacketandglasses","blogid":"15037660","caption":"<p><a class=\"tumblr_blog\" href=\"http://trigonometry-is-my-bitch.tumblr.com/post/119940095045/a-reaction-wheel-is-a-type-of-flywheel-used\" target=\"_blank\">trigonometry-is-my-bitch</a>:</p>\n\n<blockquote><p>A reaction wheel  is a type of flywheel used primarily by spacecraft for attitude control without using fuel for rockets or other reaction devices. They are particularly useful when the spacecraft must be rotated by very small amounts, such as keeping a telescope pointed at a star. They may also reduce the mass fraction needed for fuel. This is accomplished by equipping the spacecraft with an electric motor attached to a flywheel which, when its rotation speed is changed, causes the spacecraft to begin to counter-rotate proportionately through conservation of angular momentum.</p><p>though similar, it is not to be confused with a <i>gyroscope</i>.</p></blockquote>\n\n<p>mother fucking science also kerbal space program taught me this<br/></p>","created_at":"Wed, 27 May 2015 22:59:10 +0000","format":"html","id":"0005171830dfd6a5ea623e5a571d0d6a","is_submission":false,"note_count":331,"photos":[{"alt_sizes":[{"height":360,"url":"https://31.media.tumblr.com/338716b6c52acadd43474a110e150643/tumblr_noxmwevoU51tcjz2ao1_1280.gif","width":640},{"height":281,"url":"https://33.media.tumblr.com/338716b6c52acadd43474a110e150643/tumblr_noxmwevoU51tcjz2ao1_500.gif","width":500},{"height":225,"url":"https://38.media.tumblr.com/338716b6c52acadd43474a110e150643/tumblr_noxmwevoU51tcjz2ao1_400.gif","width":400},{"height":141,"url":"https://38.media.tumblr.com/338716b6c52acadd43474a110e150643/tumblr_noxmwevoU51tcjz2ao1_250.gif","width":250},{"height":56,"url":"https://33.media.tumblr.com/338716b6c52acadd43474a110e150643/tumblr_noxmwevoU51tcjz2ao1_100.gif","width":100},{"height":75,"url":"https://31.media.tumblr.com/338716b6c52acadd43474a110e150643/tumblr_noxmwevoU51tcjz2ao1_75sq.gif","width":75}],"caption":"","exif":{},"is_panorama":false,"original_size":{"height":360,"url":"https://31.media.tumblr.com/338716b6c52acadd43474a110e150643/tumblr_noxmwevoU51tcjz2ao1_1280.gif","width":640}},{"alt_sizes":[{"height":290,"url":"https://41.media.tumblr.com/af46112dac8b5edc03ccf966ba4ef460/tumb],"count":1}