Plastic Folding Propeller Kit for RC Model Airplanes A durable, lightweight folding propeller set designed as a spare part for RC model airplanes. Available in sizes from 6 to 18.5 inch, this propeller kit uses standardized dimensions to ensure consistent fit and operation. Key benefits Folding design reduces drag when the motor is off and deploys automatically when the motor spins, improving glide performance for motor gliders and electric sailplanes. Made from plastic for a balance of strength and low weight that helps maintain predictable flight characteristics. Standardized dimensions and precise molding make installation straightforward and ensure compatibility with many RC airplane prop hubs of the appropriate size. Durable construction resists damage from minor impacts and repeated folding cycles, extending service life as a replacement part. Features and specifications Function: folding propeller that opens under thrust and folds back during coasting to reduce drag. Sizes: ranges from 6 inch up to 18.5 inch to suit different motor and airframe requirements. Material: plastic, molded for consistent balance and durability. Use: sold as a prop kit spare part suitable for RC model airplanes and plane accessories. Practical use scenarios Replacement: swap in a folding propeller after damage to restore flight capability without replacing the whole motor assembly. Motor gliders and electric sailplanes: install to reduce drag during unpowered flight phases and improve glide distance. Tuning and testing: use different prop sizes from the 6 to 18.5 inch range to evaluate thrust, climb rate, and cruise efficiency for specific airframe and motor combinations. Notes on selection and installation Choose the propeller size that matches your aircraft and motor specifications for safe operation. Confirm hub and shaft compatibility before installation to ensure a secure fit.