1.Nuclear thermal engine, like NERVA, Timberwind, LANTR, LiquidCoreEngine, GasCoreEngine. When the engines start and enter Timewarp during the process of thrust increase, the engine thrust stops changing and does not reach 100% active.
2.Magnetic nozzle reduces the thrust when the throttle is lowered, but the Isp does not increase and the reactor power does not decrease.

KSPIE version: 1.29.2