Lemme explain. Take the 26 or t-55, if you set their radar to standard ("forward" cone and not Bscope) and you reduce the scan angle to ~15 degrees. You can pick up a bandit inside the 15 degrees and TWS him all the way outside of 15 degrees until the default 60... This only works for standard radar configuration not Bscope.
Point is even if you limit the radar sweep u can tws bandits outside of the limited angle.
Idk if this is a bug but the ef-24 radar is powerful but ass... The HUD indicator is never accurate outside of 30 degrees and warps. Imo, one should be able to tws a bandit inside the radar sweep angle (both vertical and horizontal) and then be able to "drag" (crank) tws even if the bandit leaves the radar sweep angle (for example, dives down and leaves the 15 degree vertical azimuth that is showen by hud.