Object next to Tweed New haven airport at tree level. Viewed by most residents of Stewart Street

Odject observed by Tweed New haven airport.I was watching cable TV which was just been installed in our area and the movie channel went fuzzy. suddenly we heard screams.  Our neighbors daughter saw the object and got scared.  My mother ran to the front door and Object was directly overhead at tree level. No sound except for ultralow humming/vibration My mother yells UFO! 
So we run out side and the neighbors are out and were looking at this thing. I can directly see into window of craft. if someone were to be standingin window I would have clearly seen them.  Entire block witnessed event i was 13 yrs old at the time and cant put pieces of event together clearly. lost track of time of event. lived by airport for entire life and had witnessed blimps and other types of aircraft during annual "air show" this was nothing I have ever seen before.  Called airport and they told us they had "hovercraft"in the area. called local news and they never showed up. I know hover craft. They would have knocked us over with the propulsion.