Great little motors! Three bought and all three worked perfectly. I didn't expect them to be quite so good. You'll get a decent little flame out the back, a good plume of hot gas (grey smoke) and they'll loft a light rocket to a good height while still keeping them low enough to float back before they leave your tiny flying field. Great entertainment for kids and adults alike. Stick each one in an Estes Taser and watch it go!