nome352

hello i am playing this on ksp version 1.8.1 using CKAN, mod version 2.15.0 but to me it seems like engines do not perform how they should. For instance at sea level sitting on the runway the J-58-P4 engine produces negative twelve kilo-newtons of thrust, and the F100-PW only produces twenty-two kilo-newtons of thrust, also at sea level and static pressure.