I built a 1/2A saucer when I was in high school. The ribs were free-hand drawn with a flat bottom and airfoiled top. The Cox Golden Bee was recessed into the front so the prop cleared the fuselage by 3/4". I didn't know too much about what I was doing in the design phase, but it turned out to be able to fly in an unusual way. My friends were amazed (and so was I) when I discovered that, with a headwind of something less than 10 MPH, I could get it to hover. That required me to take it low for a lap, then climb to reduce speed, then to snap it to a specific high angle of attack into the wind, with the wind slightly away from me (to keep the lines tight). The other kids thought it was a great model, and I was able to trade it for two kits a few months later (after I was tired of hovering).
Dave