Have you checked that your centre of mass (red ball) is in front of your centre of lift (blue ball)?
Are your engines also in line with your centre of mass, cause if not, the thrust of the engines can force your plane to flip around the centre of mass.
@jollyJoey It says at the bottom of the screen.
Press the button in the menu which looks like a triangle with a plate and 3 balls on it. Or if you have a keyboard, press space. @jollyJoey
The centre of mass has to be more further forward to what they are on prop driven planes.
It can if they're overpowered, @MechWARRIOR57
@CoolPeach the center of thrust doesn't matter as much
Have you checked that your centre of mass (red ball) is in front of your centre of lift (blue ball)?
Are your engines also in line with your centre of mass, cause if not, the thrust of the engines can force your plane to flip around the centre of mass.