Not a bad attempt, you did make things hard for yourself by not using any kind of reference. To draw from imagination you need a really good understanding of form and perspective. Starting with drawing basic 3D forms in perspective from different angles so that you can more confidently draw more complex shapes. This drawing got away from you because you were focusing more on details rather than the underlying structure they sit on. So the placement of some of the features and the overlapping of other features due to the viewing angle got lost. The details you drew look pretty good and overall it reads fairly well. Definitely keep sketching what interests you. All you need is a little more attention on the basic forms and structure with regards to perspective so that you’re not having to guess where things go. | Artwod Feedback