APC 7x4 Slow Flyer Propeller – SF Series for Electric Motors [APC07040SF]

The APC 7x4 Slow Flyer (SF) Propeller (part number APC07040SF) is specifically designed for low-RPM, high-torque electric motors used in slow and park flyer aircraft. With its wide blade design and lightweight construction, it delivers excellent thrust at low speeds—perfect for beginners, indoor flight, or relaxed outdoor cruising.

Molded from glass-reinforced nylon, this propeller maintains durability while providing quiet, efficient, and stable flight.

Key Features:

• Part Number: APC07040SF

• Size: 7 x 4 (7" diameter x 4" pitch)

• Type: Slo-Flyer – optimized for low RPM electric setups

• Material: Lightweight, glass-reinforced nylon

• Design:

  • Wide blade for strong low-speed thrust

  • Factory balanced for smooth performance

• Ideal For:

  • Slow flyers, park flyers, indoor planes, trainers

• Includes: Adapter rings for various motor shaft sizes

• Note: For electric use only – not suitable for glow/gas engines

Achieve stable, slow-speed flight with ease using the APC 7x4 SF Propeller—a trusted choice for smooth control and efficiency in slow-flying electric aircraft.

 ratio, enhancing strength and stiffness compared to traditional glass-filled nylon props. The computer-optimized design ensures a thinner profile, resulting in reduced noise and improved aerodynamic efficiency. Its lightweight construction minimizes rotating mass, leading to better throttle response and extended motor life.

Included Accessories

• One set of adapter rings (LPAR18SF) to fit various motor shaft size.

For optimal performance and reduced vibration, it's recommended to balance the propeller before use. This propeller is intended for electric motors only and is not suitable for glow engines.