I'm fond of ultralight flying and stumbled over the SF-1 Archon site. Specifications for more details. I found it very appealing as an ultralight and feel like flying it even though i don't have any prior experience with pusher configuration. I have never heard of the FFA (flying fuselage aircraft) concept so far. My knowledge is rather limited to basic conventional aircraft where the fuselage is considered to neutral by design. Can someone expand on it please?