Though it has been done under “beta” conditions in the past, the US Air Force is now conducting its first actual training class of UAV pilots who were not previously aviators.

The training is not short.  The new Lieutenants have already completed flight screening, must conduct a significant amount of T-6 simulator training, RPA basic training, and then finally to the basic qualfiication course for UAVs.  The “pipeline” is programmed as about a year.