{"action":"closed","issue":{"url":"https://api.github.com/repos/JSBSim-Team/jsbsim/issues/125","repository_url":"https://api.github.com/repos/JSBSim-Team/jsbsim","labels_url":"https://api.github.com/repos/JSBSim-Team/jsbsim/issues/125/labels{/name}","comments_url":"https://api.github.com/repos/JSBSim-Team/jsbsim/issues/125/comments","events_url":"https://api.github.com/repos/JSBSim-Team/jsbsim/issues/125/events","html_url":"https://github.com/JSBSim-Team/jsbsim/issues/125","id":374856661,"node_id":"MDU6SXNzdWUzNzQ4NTY2NjE=","number":125,"title":"Inertial tensor matrix initialization error","user":{"login":"jinzhu1911","id":8907025,"node_id":"MDQ6VXNlcjg5MDcwMjU=","avatar_url":"https://avatars2.githubusercontent.com/u/8907025?v=4","gravatar_id":"","url":"https://api.github.com/users/jinzhu1911","html_url":"https://github.com/jinzhu1911","followers_url":"https://api.github.com/users/jinzhu1911/followers","following_url":"https://api.github.com/users/jinzhu1911/following{/other_user}","gists_url":"https://api.github.com/users/jinzhu1911/gists{/gist_id}","starred_url":"https://api.github.com/users/jinzhu1911/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jinzhu1911/subscriptions","organizations_url":"https://api.github.com/users/jinzhu1911/orgs","repos_url":"https://api.github.com/users/jinzhu1911/repos","events_url":"https://api.github.com/users/jinzhu1911/events{/privacy}","received_events_url":"https://api.github.com/users/jinzhu1911/received_events","type":"User","site_admin":false},"labels":[{"id":886579688,"node_id":"MDU6TGFiZWw4ODY1Nzk2ODg=","url":"https://api.github.com/repos/JSBSim-Team/jsbsim/labels/documentation","name":"documentation","color":"fbca04","default":false}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2018-10-29T04:44:19Z","updated_at":"2018-11-07T12:31:40Z","closed_at":"2018-11-07T12:31:40Z","author_association":"NONE","body":"The inertia matrix J for rigid body is  \r\nFGMatrix33(  bixx,  -bixy,  -bixz,\r\n                    -bixy,  biyy,  -biyz,\r\n                    -bixz,  -biyz,  bizz )\r\n  (ref. Stevens and Lewis, \"Flight Control & Simulation\"),\r\nbut in the function FGMassBalance::Load of FGMassBalance class , \r\nyou pass FGMatrix33(  bixx,  -bixy,  bixz,\r\n                                 -bixy,  biyy,  -biyz,\r\n                                   bixz,  -biyz,  bizz ) to SetAircraftBaseInertias.\r\nI think this is wrong.\r\nWait for your answer. Thanks very much!"}}
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