evansb,
Nice to see you back here. I hadn’t seen your reply when I responded to fv.
You are correct. Also known as the American Gyro AG-4. It was designed by Thomas Shelton.
This video shows its maiden flight, when it had fixed gear. I think it looks rather nice.
https://en.m.wikipedia.org/wiki/Amer..._AG-4_Crusader
evansb has the con.