And why is it the Pilot's fault if the plane have this data?
Your postings are ignorant to those who fly on the red side.
Actually red Pilots try every bit for testing the Spits and getting at least a conclusion with which Spitfire u have a chance and didnt lack in performance so much.
I fly for both sides since beginning and for red it isnt funny at the moment.
Why u got shot down in a 109, didnt check 6, there was more then one Spitfire
, u was turning and wasting energy. U got dived by a Spit.