I made this discovery when I was toying around with ejector seats. I remembered some of the first ejector seat prototypes were propelled by compressed springs. Then, I thought it would be fun to do a little experiment to see if I could do it the same way in Simple Planes. So, I made this little thing. How it works is pistons pull a spring into some blocks, compressing the spring. Then, detachers will let go of the spring and the spring springs up. I made sure to set the launching force of the detacher to zero. How you actually work this is by sliding the left slider--or VTOL--up. Then, activate AG1. I will not be doing ejector seats with a compressed spring. This is just a science experiment. I may put out an experiemental aircraft with a compressed spring ejector seat, but I will not use it on other builds.