A U.S. Navy Lockheed PO-1W Constellation. A static aircraft model. The model is height and roll adjustable. Ported with appropriate Trainz modifications by me from the Lockheed PO-1W Constellation model on the Google 3D Warehouse. 37K Polys. A military version of the Lockheed Constellation, it was designed to serve as a Navy airborne early warning system using two large radomes, a vertical dome above and a horizontal one below the fuselage. It was introduced in the early 1950s and retired from service in 1978, although a single specially modified EW aircraft remained in service with the U.S. Navy until 1982.