Broad daylight gold colored flying object about the size of an airliner wing cqame close to my private airplane.

I was flying my owned airplane at approx 1500 Ft on a cold and bright (SUNNY) AFTERNOON AROUND 3:00 pm North over Lake Galena about 115 MPH when I caught sight of a rapidly falling object and thought perhaps it was a falling weather balloon. This bright gold colored object shaped like a vertical airliner wing & estimated to be about 30' tall descended and stopped mid-air in front of my airplane about 200 yards. I pushed full throttle to try to get up close then it took of at a moderate of speed to the S/E faster than I could catch up with it.  I immediately notified Willow Grove air Base (Horsham PA and now closed) and they had radar contact with me but their radar could not 'see' the object.  The object then came back to my airplane on my right wing, again about 200 Yds distant while I was maintaining conversation via radio with the Naval Base Tower operator.  The object then tilted top backward and shot up into the sky so fast I could hardly see it leave.  The W,G tower operator reported it to (?) and I received a call that night from someone in DC asking for my story.  I heard later that there were phone calls to the New Britain Twp police dept by persons on the ground who also saw this.
Witness elects to remain totally anonymous; provides no contact information.  PD