 Other engines of the "Rocket" design which were delivered to the Liverpool and Manchester railway included "Arrow", "Comet", "Dart" and "Meteor" all being delivered to the railway during 1830.At around the same time, Stephenson experimented with front-mounted cylinders.The unsuccessful 0-4-0 "Invicta", built in 1829 immediately after "Rocket", still had them at an angle.