Wings were farther back and closer to the plane than the usual passenger type.
Like
this?
And I don't really think that you could really judge the smoothness of the flight from the ground. If it were on autopilot or in the hands of an
experienced pilot they can get it going dead straight at a constant speed.
But this light arrangement
does sound interesting, plus the odd flightpath. How high was it? Crashing into chimneys, or at 10, 000?