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I was thinking how to express in english a reply and Gripes has done it for me. I thought that the flying performance of a plane depends on its indicated airspeed. Now I'm not sure what is wrong, lock on or me. So, if someone with aeronautical knowledges could tell...

Hi, I have just bought lock on gold at extremely low price at a big store in my city. I could not believe it!, but now I have my copy so many time after the release. Well, I directly upgraded to patch 1.12 and I've been doing some testing flying the su-25t. Now I have a doubt about the speed. At sea level, I can fly 500 km/h and everything is stable and soft. But at 8000 meters, with the same speed it is like an earthquake. Why is it that diferent behaviour if the indicated speed remains the same? Thx!