In 1985 NASA took F-106B 57-2507 and cut in in half length-ways in order to use the left side of the aircraft and wing in Wind Tunnel tests for the Vortex Flap In-Flight Flow Visualization project. NASA called it the F-53 Full Scale Wind Tunnel Test. Here is a 1985 Article in the 16 Mar 1985 Flight International where NASA sawed the F-106B in-half for testing the vortex flaps on the remaining wing in the wind tunnel. [Flightglobal archives]