This once was my hobby web site, but I've grounded myself and no longer have an airplane.
If you're looking for the BD-4 airplane website, it's at http://www.bd-4.org
This three letter domain name (bd4.org) is for sale.
I'm not delusional about its value.
My email: david(at)bd4{dot}org
My FB: facebook.com/daveanderson42