When making a prop plane there's a annoying poop stain in the design where the prop is making not enough thrust but is made out of glass and I hate it please add an option in the option chests menu to disable something that makes prop planes useless without making the prop large enough that it's 0.05 metres away from the ground.
But spinning is a good trick.
I do find tuning propellers to get enough thrust but not overspeed to be tricky.