Large cigar-shaped object moving in an unusual way.

Though some time has gone by, this is my story...
I know it's been a while back that my sighting took place, but the experience has always stayed clear in my head.  With it being in the 1970's when it happened, I did not know of any one to tell and that was way before computers.
I was in my 20's and living with my mother at the time.  We lived about 5 miles from the nearest town.  She was gone that day.  I was an average country boy, no drugs, very limited drinking.
It was a very clear day, bright sunshine, no wind, unusually still.  I decided to lay in the sun out next to a small pond that was about a quarter of a mile from our house.  The pond was surrounded by a wheat field and there were no trees near it.
I had just gotten comfortable on my back lying on a towel near the water.  I closed my eyes and shortly after doing so I opened them because something briefly blocked the sun.
When I looked up there was a large cigar shaped object, dark grey or black that had just passed over me.  It was amazing!  I kept my eyes on it as I stood up.  I did not see any windows, no lights, just a large dark cigar shape slowly passing over in absolute silence.  From its appearance to its movement, nothing about it looked familiar.  I wasn't afraid, but I was so curious and shocked by what I was looking at that I ran to follow it as far as I could, but couldn't keep up.  It stayed ahead of me passing over our house. The house was 2 story and the object was either very low or very large because it didn't appear to be very high above the house & trees.
It's difficult to explain its movement because it didn't spin nor did it move like a balloon or airplane.
Movement was  - Imagine dangling a pole with cord tide in the middle of it.  The pole is suspended vertically.  Then you tap one end of the pole to make it turn.
Witness indicates that the date of the event is approximate.  PD