The cigar shaped crafts unusual attitude is something I have never seen repeated with any modern aircraft past or

Age at time of sighting: Age 12  
Location: Portland, Oregon  
Viewpoint: SE 53rd Street between Burnside and Stark St.
 Location of object or perceived location: Over Portland West hills, at a starting altitude estimated at 4000 AGL moving at a 45-degree angle (from the horizon). Movement appeared to be from South to North at a speed I would now estimate at no more than 55 knots. I calculate the speed by using other more common references such as identifiable aircraft I have seen in the same vicinity on other days. The object I observed and the object / crafts unusual attitude is something I have never seen repeated with any modern aircraft past or present.
 Description of object: Cigar shaped (ends pointed), dimensional measurements estimated as follows – Length 250’, 30’ girth, color a dark gray, almost black.
 Detail of sighting: On the day of the UFO sighting, 3 friends and I where playing football in my parent’s backyard, I was the first to notice the object. My friends where more interested in playing football rather then studying the anomaly which I alerted them all to … I can remember one of my friends stating after looking at the object that it must be an aircraft banking and thus no visible empennage or wings. I continued to watch more intently after the friend’s suggestion and waiting for what seemed to be about 2 minuets as to view the craft turn and expose some identifiable surface. However I did not notice any change in the flight path of the object nor view any recognizable aircraft surfaces. In fact the angel of the object and its assent seemed so unusual I thought perhaps the object was a blimp, but I concluded that was not logical seeing its shape, speed, lack of identifiable markings, attitude and size. After about a total of 3-1/2 minutes I turned to my friends again to explain to them my thoughts and when I turned back the object was gone. The last point I saw the object put it in the clear of clouds and its disappearance in just an instant still amazes me even today.
Witness indicates that the date of the event is approximate.  PD