1. Introduction
This manual provides detailed instructions for the E-flite Spinner Apprentice EFL2733 replacement parts. This set includes a spinner cone and a backplate, crucial components for the propeller assembly of your E-flite Apprentice model aircraft. Proper installation and maintenance ensure optimal performance and safety during flight.
The E-flite Spinner Apprentice EFL2733 is designed for a precision fit, ensuring reliable operation and maintaining the aerodynamic efficiency of your aircraft.

Figure 1: E-flite Spinner Apprentice EFL2733 Replacement Parts (Spinner Cone and Backplate)
2. Setup and Installation
Follow these steps to correctly install the spinner cone and backplate on your E-flite Apprentice model aircraft.
- Preparation: Ensure your aircraft's power is disconnected and the propeller is removed for safety. Inspect the propeller shaft for any damage or debris.
- Install Backplate: Slide the backplate onto the propeller shaft, ensuring it sits flush against the propeller hub. The backplate provides a stable base for the spinner cone.
- Attach Propeller: Reinstall your propeller onto the shaft, followed by the propeller washer and nut. Tighten the propeller nut securely, but do not overtighten.
- Install Spinner Cone: Align the spinner cone with the backplate and the propeller. The spinner cone typically attaches with small screws that thread into the backplate. Ensure the cone is centered and rotates freely without obstruction.
- Final Check: Gently rotate the propeller and spinner assembly by hand to confirm smooth operation and proper alignment. Verify all screws are tightened.
Video 1: Product Overview of the E-flite Spinner Apprentice EFL2733, demonstrating its components and basic assembly.
3. Operating Considerations
The spinner assembly plays a vital role in the aerodynamics and aesthetics of your model aircraft. A properly installed spinner reduces drag and contributes to the overall efficiency of the propeller system.
- Aerodynamic Efficiency: The spinner cone streamlines the airflow around the propeller hub, minimizing drag and improving flight performance.
- Propeller Protection: It helps protect the propeller mounting hardware from foreign objects and reduces the risk of propeller damage during minor impacts.
- Vibration Reduction: A balanced spinner assembly can help reduce vibrations, leading to smoother operation and less wear on engine components.
Video 2: E-flite Cirrus SR22T 1.5m Product Video, showcasing an E-flite aircraft in flight, demonstrating the role of the spinner in overall aircraft performance.
Video 3: HobbyZone Apprentice S2 1.2m Overview, illustrating the Apprentice aircraft in action, highlighting the integrated spinner assembly.
4. Maintenance
Regular inspection and maintenance of your spinner assembly are essential for safe and enjoyable flights.
- Pre-Flight Check: Before each flight, visually inspect the spinner cone and backplate for cracks, dents, or any signs of wear. Ensure the spinner is securely attached and rotates freely.
- Post-Flight Cleaning: After flying, clean any dirt, grass, or debris from the spinner and propeller area. This prevents imbalances and potential damage.
- Screw Tightness: Periodically check the tightness of the screws holding the spinner cone to the backplate. Vibrations during flight can sometimes loosen these fasteners.
- Replacement: If any part of the spinner assembly shows significant damage, replace it immediately with genuine E-flite parts to maintain performance and safety.
5. Troubleshooting
Here are some common issues you might encounter with your spinner assembly and their solutions:
- Excessive Vibration:
- Check for propeller balance. An unbalanced propeller is a common cause of vibration.
- Ensure the spinner cone is properly centered and securely attached.
- Inspect the spinner cone and backplate for damage that might cause imbalance.
- Spinner Not Rotating Freely:
- Verify that the spinner cone is not rubbing against the motor cowl. Adjust its position if necessary.
- Check for any debris or foreign objects lodged between the spinner and the backplate or cowl.
- Spinner Detaches During Flight:
- Ensure all mounting screws are securely tightened.
- Inspect the backplate and spinner cone for cracks or damage around the mounting points. Replace if damaged.
6. Specifications
| Feature | Detail |
|---|---|
| Product Name | Spinner Apprentice |
| Model Number | EFL2733 |
| Brand | E-flite |
| Includes | Spinner cone and backplate |
| Product Dimensions | 4 x 2.1 x 1.4 inches |
| Item Weight | 0.352 ounces |
| Manufacturer | Horizon Hobby |
7. Warranty Information
E-flite products, manufactured by Horizon Hobby, typically come with a limited warranty covering defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation included with your original product purchase or visit the official Horizon Hobby website. Keep your proof of purchase for warranty claims.
8. Customer Support
For technical assistance, replacement parts, or further inquiries regarding your E-flite Spinner Apprentice EFL2733, please contact Horizon Hobby customer support:
- Website: Visit the Horizon Hobby website for FAQs, support resources, and contact information.
- Phone: Refer to the contact section on the Horizon Hobby website for regional phone support numbers.
- Online Store: For purchasing additional parts or accessories, visit the E-flite Store on Amazon.
Always ensure you are using genuine E-flite replacement parts to maintain the integrity and performance of your model aircraft.





