{"action":"opened","issue":{"url":"https://api.github.com/repos/tbeu/Modelica/issues/2039","repository_url":"https://api.github.com/repos/tbeu/Modelica","labels_url":"https://api.github.com/repos/tbeu/Modelica/issues/2039/labels{/name}","comments_url":"https://api.github.com/repos/tbeu/Modelica/issues/2039/comments","events_url":"https://api.github.com/repos/tbeu/Modelica/issues/2039/events","html_url":"https://github.com/tbeu/Modelica/issues/2039","id":197313344,"number":2039,"title":"Add planar four bar loop to MultiBody examples","user":{"login":"modelica-trac-importer","id":22202507,"avatar_url":"https://avatars.githubusercontent.com/u/22202507?v=3","gravatar_id":"","url":"https://api.github.com/users/modelica-trac-importer","html_url":"https://github.com/modelica-trac-importer","followers_url":"https://api.github.com/users/modelica-trac-importer/followers","following_url":"https://api.github.com/users/modelica-trac-importer/following{/other_user}","gists_url":"https://api.github.com/users/modelica-trac-importer/gists{/gist_id}","starred_url":"https://api.github.com/users/modelica-trac-importer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/modelica-trac-importer/subscriptions","organizations_url":"https://api.github.com/users/modelica-trac-importer/orgs","repos_url":"https://api.github.com/users/modelica-trac-importer/repos","events_url":"https://api.github.com/users/modelica-trac-importer/events{/privacy}","received_events_url":"https://api.github.com/users/modelica-trac-importer/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"beutlich","id":14896695,"avatar_url":"https://avatars.githubusercontent.com/u/14896695?v=3","gravatar_id":"","url":"https://api.github.com/users/beutlich","html_url":"https://github.com/beutlich","followers_url":"https://api.github.com/users/beutlich/followers","following_url":"https://api.github.com/users/beutlich/following{/other_user}","gists_url":"https://api.github.com/users/beutlich/gists{/gist_id}","starred_url":"https://api.github.com/users/beutlich/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/beutlich/subscriptions","organizations_url":"https://api.github.com/users/beutlich/orgs","repos_url":"https://api.github.com/users/beutlich/repos","events_url":"https://api.github.com/users/beutlich/events{/privacy}","received_events_url":"https://api.github.com/users/beutlich/received_events","type":"User","site_admin":false},"assignees":[{"login":"beutlich","id":14896695,"avatar_url":"https://avatars.githubusercontent.com/u/14896695?v=3","gravatar_id":"","url":"https://api.github.com/users/beutlich","html_url":"https://github.com/beutlich","followers_url":"https://api.github.com/users/beutlich/followers","following_url":"https://api.github.com/users/beutlich/following{/other_user}","gists_url":"https://api.github.com/users/beutlich/gists{/gist_id}","starred_url":"https://api.github.com/users/beutlich/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/beutlich/subscriptions","organizations_url":"https://api.github.com/users/beutlich/orgs","repos_url":"https://api.github.com/users/beutlich/repos","events_url":"https://api.github.com/users/beutlich/events{/privacy}","received_events_url":"https://api.github.com/users/beutlich/received_events","type":"User","site_admin":false}],"milestone":null,"comments":0,"created_at":"2016-12-23T04:59:30Z","updated_at":"2016-12-23T04:59:30Z","closed_at":null,"body":"**Reported by anonymous on 5 Aug 2016 11:08 UTC**\nhttp://stackoverflow.com/q/38737691/6681847 showed that modeling a planar four bar loop with MultiBody caused some struggle. Checking the MultiBody loop examples I noticed that there is no simple model of a planar four bar loop demonstrating the necessity of MultiBody.Joints.RevolutePlanarLoopConstraint. (MultiBody.Examples.Loops.Utilities.Cylinder uses MultiBody.Joints.RevolutePlanarLoopConstraint but is not really of help here.)\n\ndietmarw's example model [Planar4Bar](http://stackoverflow.com/a/38767267/6681847) could serve as a start adding a new example model to the MSL MultiBody.\n\n----\n\nMigrated-From: https://trac.modelica.org/Modelica/ticket/2039"}}
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