I sketched this Galaxy Explorer out while on an airplane flying to Atlanta from Portland last week. I used the 53 Paper App and a Walnut 53 Pencil on my iPad. Sketching and rendering on the iPad can be lots of fun. Although the stylus limitations on an iPad can be frustrating, the 53 Pencil has become my favorite iPad stylus, due to its feel, ergonomics functionality, and lack of unncessary features. I am qualified to say that it is elegant.
The Galaxy Explorer is the classic LEGO spaceship from the late 1970's, although I made this one a bit more streamlined, which is accomplished by making the wing-part thicker and the cabin-payload part shorter. This is not unlike some modern LEGO reinterpretations of the design. The delta-strake wing comfiguration is very Space Shuttle and front is kind of Y-Wing-esque. The aesthetics are straight from the late 1970's.
Eventually, I will pull this into Sketchbook or PhotoShop and clean up the lines, curves, perspectives, and colors, but for a freehand-while-flying-through-turbulance effort, I am really happy with the results.
Make sure to check out my Classic Space Tumblr as well.