Jets accelerate from the first second of the engine start (bug added after Jets DLC) If the player climbed into the cockpit and press button - Increase Thrust ("Shift" by default) then the aircraft immediately accelerates already from first second and at 5 percent acceleration of thrusters! Jets can accelerate even when the pilot did not have time to sit in the cockpit
BIS, please give a delay for acceleration, as it was before Jets DLC, as it looked more adequately