{"action":"created","issue":{"url":"https://api.github.com/repos/diydrones/ardupilot/issues/2933","labels_url":"https://api.github.com/repos/diydrones/ardupilot/issues/2933/labels{/name}","comments_url":"https://api.github.com/repos/diydrones/ardupilot/issues/2933/comments","events_url":"https://api.github.com/repos/diydrones/ardupilot/issues/2933/events","html_url":"https://github.com/diydrones/ardupilot/issues/2933","id":109577324,"number":2933,"title":"Plane: stall detection","user":{"login":"magicrub","id":4782875,"avatar_url":"https://avatars.githubusercontent.com/u/4782875?v=3","gravatar_id":"","url":"https://api.github.com/users/magicrub","html_url":"https://github.com/magicrub","followers_url":"https://api.github.com/users/magicrub/followers","following_url":"https://api.github.com/users/magicrub/following{/other_user}","gists_url":"https://api.github.com/users/magicrub/gists{/gist_id}","starred_url":"https://api.github.com/users/magicrub/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/magicrub/subscriptions","organizations_url":"https://api.github.com/users/magicrub/orgs","repos_url":"https://api.github.com/users/magicrub/repos","events_url":"https://api.github.com/users/magicrub/events{/privacy}","received_events_url":"https://api.github.com/users/magicrub/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/diydrones/ardupilot/labels/Plane","name":"Plane","color":"d7e102"},{"url":"https://api.github.com/repos/diydrones/ardupilot/labels/Safety%20Feature","name":"Safety Feature","color":"e11d21"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2015-10-02T21:44:47Z","updated_at":"2015-10-12T20:53:58Z","closed_at":null,"body":"Stall detection is needed. Must work with, and without, pitot tube.\r\n\r\nrelated to stall recovery issue https://github.com/diydrones/ardupilot/issues/2669\r\n"},"comment":{"url":"https://api.github.com/repos/diydrones/ardupilot/issues/comments/147517233","html_url":"https://github.com/diydrones/ardupilot/issues/2933#issuecomment-147517233","issue_url":"https://api.github.com/repos/diydrones/ardupilot/issues/2933","id":147517233,"user":{"login":"marcmerlin","id":1369412,"avatar_url":"https://avatars.githubusercontent.com/u/1369412?v=3","gravatar_id":"","url":"https://api.github.com/users/marcmerlin","html_url":"https://github.com/marcmerlin","followers_url":"https://api.github.com/users/marcmerlin/followers","following_url":"https://api.github.com/users/marcmerlin/following{/other_user}","gists_url":"https://api.github.com/users/marcmerlin/gists{/gist_id}","starred_url":"https://api.github.com/users/marcmerlin/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/marcmerlin/subscriptions","organizations_url":"https://api.github.com/users/marcmerlin/orgs","repos_url":"https://api.github.com/users/marcmerlin/repos","events_url":"https://api.github.com/users/marcmerlin/events{/privacy}","received_events_url":"https://api.github.com/users/marcmerlin/received_events","type":"User","site_admin":false},"created_at":"2015-10-12T20:53:58Z","updated_at":"2015-10-12T20:53:58Z","body":"Since I happen to be an airplane pilot, you are correct that you can get one wing that stalls first and that will give you a clue that you stalled as the wing dips.\r\nHowever, you can have a coordinated stall where no wing dips and just the nose stalls.\r\nIMO, it's easier and more reliable to notice that the nose just dropped a bunch without any control input asking for it to do so.\r\n(actually, \"dropped\" is a misnomer, you can get an accelerated stall in a 60 degree bank angle where the nose buffets and basically stalls but not towards the ground. You have compute the direction vector for your current attitude and see that the nose slipped from there).\r\nYour other stall is a stall/spin where indeed one wing drops and depending on the plane, you can end up in a spin.\r\nhttps://www.youtube.com/watch?v=F6d4VKdc34A (watch 10 seconds after start)"}}