KP 10:1 GEARED RUBBER WINDER To achive long flight times with rubber free flight models, you will need to apply many turns to the rubber motor. The quickest and easiest way to do this is using a geared rubber winder. This winder has a 10:1 ratio which means that for every turn of the handle, the rubber will be wound 10 times. Made in the UK from tough acetal plastic and finished in bright yellow (so you'll easily find it when you put it down!), this winder is perfect for smaller and indoor models.