N991RS is for the two U-2 Squadrons in the USAF that I was a member of. The 99th Reconnaissance Squadron is the primary operational unit for the U-2 and the 1st Reconnaissance Squadron is the training unit for the U-2 and the oldest unit in the US Air Force (goes back to the 1st Aero Sqdn under Gen Pershing in 1914)It's an RV-14A N914RS. So close but you will have to redo.