APC propellers have been popular for years and are developed based on the latest findings and manufactured on state-of-the-art machines. Due to their special blade shape, they are significantly quieter than comparable propellers and can achieve very high efficiency with proper adjustment. A wide selection of different sizes and pitches is available for optimal customization. Recent developments include the APC Slow and Electric Props, which are even lighter and specifically designed for the needs of electric models and their Reynolds number range. These are available not only in the well-known gray color but also in black and come with adapters for standard shaft diameters.