Acceleration is off

Acceleration is not calculated correctly, making it seem very “arcady”. In the game it’s linear, which is not realistic. No need to implement a full blown physics system with drag and thrust calculations, but maybe implement something like 5m/sec^2 until it hits Vr. Play around with that and I think you will find your planes looking more realistic when taking off. Deceleration feels off too, but not as bad. Almost as though the speed plateaus down (faster between 150 and 100 kts, the slower down to 50, then slower etc.)