Model of UFO over the New York State Thruway that I witnessed in November of 87 or 88(don't remember exact year) at around 8pm. It was at least 250' to 300' tip to tip and flew in like a slow moving giant wing, but even at about 400' altitude, I could not see the edges...almost as if it were invisible. There were at least 15 cars pulled over in both directions who also witnessed this event. Sorry about my Scetchup skills, I will update as I improve. The thumbnail was retouched in Photoshop to depict night.