Folding props do cost more than fixed types. However when flying sailplanes and gliders they greatly reduce drag. A spinning prop is much more drag than a stopped prop and a folded prop is even less drag than a stopped fixed prop. Additionally folding props are rarely broken. Just be sure the motor is off on landing. ;-)
Folding props are also often utilized on Hot-Liners (hot high speed sailplanes), Some pylon type racers and even seen on faux jets which are prop driven. Anything you want to go very fast in a drive can also benefit from a folding prop.
Most props can be cleverly assembled in pusher configuration where the prop folds back over the spinner. We do not stock reverse rotation blades so care must be taken when setting up lateral thrust lines with conventional rotation props in pusher configuration.
 "MPI Folding Prop Blade set 11-8, 6mm Yoke")
 "MPI Folding Prop Blade set 12-6, 8mm Yoke")
 "Radical RC Folding Prop Blade set 12x6.5, 8mm Yoke")
 "Sonic Modell Folding Prop Blade set 12-8, 6mm Yoke")
 "Sonic Modell Folding Prop Blade set 12-8.5, 6mm Yoke")
 "Sonic Modell Folding Prop Blade set 13-7, 6mm Yoke")
 "MPI Folding Prop Blade set 13-9, 8mm Yoke")
 "Radical RC Folding Prop Blade set 14x8, 8mm Yoke")
 "MPI Folding Prop Blade set 14-9.5, 8mm Yoke Carbon")
 "Radical RC Folding Prop Blade set 15x13, 8mm Yoke")
 "MT 15.5x9.5, 8mm Yoke Folding Prop Blade Set")
