Ken, One small, simple thing you could do is make all Articles easier for the new or present viewers to find. I suggest under Aircraft History on the Articles Home Page you place the current aircraft type categories, rather than requiring the viewer to click on Aircraft History to open the further categories. If in the future new categories are needed, such as Lighter Than Air, they could be easily added by you per requests from an author.
Some people have told me they haven't found articles I have written about their aircraft. They just don't realize they have to click on Aircraft History to see the fuller article breakdown, and then click on a category that fits what they are looking for. They apparently think the Aircraft History title represents the default generalized articles they see on the Articles Home Page.