Working on a scratch build design in Open Rocket. I'm running some simulations to get an idea of performance with different motors. I'm missing something in terms of identifying where to find values equating to safe launch conditions such as thrust to weight ratio. In trying to find the smallest motor I could safely use with my design, I kept trying simulations with smaller and smaller motors and never saw any warnings even with motors I know would not provide enough thrust for a safe launch. Help...