FSX Northrop BT-1 With Updated Panels. The Northrop BT1 first flew in 1936 and was assigned to both the USS Yorktown and the USS Enterprise. This model is painted for the Executive Officer of Squadron VB-6 assigned to the USS Enterprise. The package by Paul Clawson features a re-worked VC with more gauges added, a new 2D panel and new smoke effect. This is the whole aircraft. Original model by Paul Clawson, new VC configuration and design, new 2D panel and new smoke effect configuration by Michael Pook.