I am interested in identifying an aircraft i saw near Philly?

Question

it was shaped like a sail plane but much larger, long thin fuselage, wings were long and straight out from midship. looked to have two prop engines away from fuselage. a large flattened sphere below the fuselage, plane was all black with no visable markings. from the front three head lights, one each near wing tips an one at the nose or the front of the sphere. Spotted at a low altitude(less than 800ft) moving very slowly, well below stall for commercial planes, and made no noise. seen north of Philly (langhorne) before 5pm.

Answer 1

this could have a test craft of some sorts or other anything from a weather information purpose built aircraft to a millatery secret test prototype craft , i suggest you contact your nearest  local plane spotters club they will be glad to help you . good luck. mike w.

Answer 2

sounds like the U2.

Answer 3

Sounds like the government's new X-plane.  I wonder why they're flying it near the city. hmmm

Answer 4

Probably a U2 Spyplane

http://en.wikipedia.org/wiki/Lockheed_U-...

Answer 5

Possibly the Sc-7 Skyvan, also known as the "Shorts."  Find the picture on Wikipedia.  It is used by both commercial and military (which may have accounted for the dark coloration).