Campbell F
http://mysteriousbill.weebly.com/campbell-f.html
Great Lakes XSG-1
http://mysteriousbill.weebly.com/great-lakes-xsg-1.html
McGaffey Aviate
http://mysteriousbill.weebly.com/mcgaffey-aviate.html
Nemeth
http://mysteriousbill.weebly.com/nemeth.html
Northrup Flying Wing (his first one)
http://mysteriousbill.weebly.com/northrup.html
Stearman-Hammond
http://mysteriousbill.weebly.com/stearman-hammond.html
Stout Skycar
http://mysteriousbill.weebly.com/stout-skycar.html
Vance
http://mysteriousbill.weebly.com/vance.html
Weick
http://mysteriousbill.weebly.com/weick.html
Here is a YouTube video on the Abrams Explorer
http://www.youtube.com/watch?v=gsaAeLaNr60