E-flite 50-60cc 90-Degree Tail Retract P-51 (EFLG750) Instruction Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your E-flite 50-60cc 90-Degree Tail Retract, model EFLG750. This unit is specifically designed for P-51 model aircraft in the 50-60cc class. Please read this manual thoroughly before installation and use to ensure proper function and safety.

2. Safety Precautions

• Always disconnect the power source from your aircraft before performing any installation, maintenance, or adjustments to the retract unit.
• Ensure all wiring connections are secure and correctly polarized to prevent damage to the retract unit or receiver.
• Keep fingers and loose clothing clear of moving parts during operation to avoid injury.
• Verify that the retract unit operates smoothly and without binding before flight.
• This product is intended for users aged 14 years and older. Adult supervision is recommended for younger users.

3. Package Contents

Carefully unpack all components and verify that the following items are included:

• E-flite 50-60cc 90-Degree Tail Retract Unit (EFLG750)
• Tail Wheel Assembly
• Mounting Screws (4x)
• Hex Wrenches (2x)
• Wiring Harness

Image 1: Contents of the E-flite 50-60cc 90-Degree Tail Retract package. Shown are the main retract mechanism with wiring, a tail wheel, four mounting screws, and two hex wrenches for installation.

4. Setup and Installation

Follow these steps for proper installation of the tail retract unit into your P-51 model aircraft:

1. Prepare the Mounting Location: Ensure the tail retract mounting area in your aircraft fuselage is clean and free of debris. The mounting surface should be flat and reinforced as per your aircraft's design.
2. Mount the Retract Unit: Position the EFLG750 retract unit into the designated bay. Secure it using the provided mounting screws. Ensure the unit is aligned correctly for the tail wheel to retract and extend without obstruction.
3. Install the Tail Wheel: Attach the tail wheel assembly to the retract strut. Use the appropriate hex wrench to tighten any set screws, ensuring the wheel spins freely but is securely fastened.
4. Connect Wiring: Connect the retract unit's wiring harness to an available channel on your aircraft's receiver or a dedicated retract controller. Refer to your receiver/controller manual for specific channel assignments. Typically, a dedicated gear channel is used.
5. Initial Testing: Before securing all access panels, perform an initial test. Power on your transmitter and receiver. Operate the gear switch to cycle the retract unit. Observe for smooth extension and retraction. Adjust linkages or mounting if any binding occurs.
6. Adjust Endpoints: If your radio system allows, adjust the servo travel endpoints for the retract channel to ensure the unit fully extends and retracts without over-stressing the mechanism.

5. Operating Instructions

The E-flite EFLG750 tail retract unit operates via a standard servo channel on your radio control system. Once installed and configured:

• Extension: Move the assigned gear switch on your transmitter to the 'down' or 'extended' position. The tail wheel will deploy to its operational position.
• Retraction: Move the assigned gear switch on your transmitter to the 'up' or 'retracted' position. The tail wheel will retract into the fuselage.
• Ensure the aircraft is stationary or at a very low speed during ground tests to prevent damage.
• Always perform a pre-flight check to confirm proper retract operation before each flight.

6. Maintenance

Regular maintenance will prolong the life and ensure reliable operation of your retract unit:

• Inspection: Periodically inspect the retract unit for any signs of wear, damage, or loose fasteners. Check the wiring for fraying or damage.
• Cleaning: Keep the retract mechanism clean from dirt, dust, and debris. Use a soft brush or compressed air to remove foreign particles. Avoid using harsh chemicals.
• Lubrication: Lightly lubricate pivot points and moving parts with a dry lubricant or a small amount of silicone grease if necessary. Avoid over-lubrication, which can attract dirt.
• Wheel Check: Ensure the tail wheel rotates freely and is not binding. Check the tire for wear or damage.

7. Troubleshooting

If you encounter issues with your EFLG750 retract unit, consider the following:

• Retracts Not Operating:
  • Check power supply to the receiver/controller.
  • Verify all wiring connections are secure and correctly plugged into the receiver/controller.
  • Ensure the transmitter's gear switch is functioning correctly and assigned to the correct channel.
  • Inspect for any physical obstructions preventing movement.
• Partial Extension/Retraction:
  • Check for binding in the mechanism or strut. Clean and lubricate if necessary.
  • Adjust servo travel endpoints on your transmitter to ensure full range of motion.
  • Verify adequate power supply; low voltage can affect performance.
• Excessive Noise During Operation:
  • Inspect for loose components or screws.
  • Check for debris within the mechanism.
  • Ensure the unit is not binding against the airframe structure.

8. Specifications

9. Warranty and Support

E-flite products are manufactured to high standards. For warranty information, technical support, or service inquiries, please contact Horizon Hobby, the manufacturer, directly. Retain your proof of purchase for warranty claims. Contact details can typically be found on the manufacturer's official website or product packaging.

Manufacturer: Horizon Hobby

Website: www.horizonhobby.com