My sources (and Wiki) say that the Vickers F.B.5 had an 80-hp
Gnome Monosoupape nine-cylinder
rotary engine. Vickers F.B.5 - Wikipedia, the free encyclopedia
The visually similar Royal Aircraft Factory F.E.2 and F.E.2b were powered by a 120 hp (later F.E.2bs had a 160 hp) Beardmore liquid-cooled in-line engine.
Royal Aircraft Factory F.E.2 - Wikipedia, the free encyclopedia
I'm at the office and can't access my home computer drive to check out my copy of the LadnDad model, and I can't access the site posted by Matthew from a dot mil computer, so I can't comment on either one for now.
Don