I was never that good with a pencil or paintbrush but I created a number of aircraft sideviews (I scanned silhouettes or line drawings out of books as a template) when I first learned CorelDraw at work 30 odd years ago... later sort of got used to using Illustrator - I recall doing a Grumman Tigercat and using Photoshop to do the scheme, shadows and light effects. Wonder if I've still got it somewhere? Sadly don't have the software or the patience anymore...
Lovely stuff, hope to see some more!