Do you claim a GU-11 among your plane spotting trophies? If none can be found on the flight line, try the parking lot, where you may well spot a gull. (Unfortunately, they like runways too.) OK, gull (GU-11) type designation jokes have been played endlessly on, yes, gullible pilots. But they also possess properties prized by automobile and aircraft designers and presented as "gull-wing" doors (hinged at the top). To spot the most pronounced preponderance of Laridae’s lines, seek out the gull-winged Stinson Reliant, a classic radial-engined taildragger that dates to the 1930s.