I like the work on the engine. I hope that it is finished and that you can start working on improving the amount of detail. Firstly, the windows on the stern seem too big and while I know that textures would solve that, their size reduces detail and if you look at the windows of Bretonian caps, you'll always see them in a single row. I'm rather for making more small windows there and on the sides of the head. Maybe in front of the wheels too. If the number of polys is alright.