1. Introduction
This manual provides essential instructions for the assembly, setup, operation, and maintenance of your E-flite Apprentice STS 1.5m BNF Basic RC Airplane. Please read this manual thoroughly before operating the aircraft to ensure safe and correct usage.
The E-flite Apprentice STS 1.5m RC Airplane, a smart trainer model designed for beginners.
The E-flite Apprentice STS 1.5m is a large-sized remote-controlled aircraft, ideal for new pilots due to its enhanced visibility and stability in various wind conditions. It features exclusive SAFE (Sensor Assisted Flight Envelope) technology, which simplifies the learning process.
An emblem indicating that the E-flite Apprentice STS 1.5m is a beginner-friendly RC aircraft, requiring no prior experience.
2. Safety Information
WARNING: Read the ENTIRE instruction manual to become familiar with the features of the product before operating. Failure to operate the product correctly can result in damage to the product, personal property and cause serious injury. This is a sophisticated hobby product. It must be operated with caution and common sense and requires some basic mechanical ability. Failure to operate this Product in a safe and responsible manner could result in injury or damage to the product or other property. This product is not intended for use by children without direct adult supervision. Do not use with incompatible components or alter this product in any way outside of the instructions provided by Horizon Hobby, LLC. The product manual contains instructions for safety, operation and maintenance. It is essential to read and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or serious injury.
3. Package Contents
The E-flite Apprentice STS 1.5m BNF Basic package includes the following components:
- E-flite Apprentice STS 1.5m RC Airplane
- Smart 30A BL ESC and BL Outrunner Motor
- 13-gram Digital Servo (2)
- 37-gram Servo (4)
- 3230 Flight Controller
- 4650 Serial Receiver
- Product Manual
4. Items Required for Completion
The E-flite Apprentice STS 1.5m BNF Basic model requires additional components, which are not included in this package, to be ready for flight:
- Compatible Spektrum DSMX/DSM2 Aircraft Transmitter (6+ channels recommended)
- LiPo Flight Battery (e.g., 3S 3200mAh)
- Compatible LiPo Battery Charger
Visual representation of additional components required for operation: battery, charger, and transmitter.
5. Assembly
The Apprentice STS 1.5m is designed for quick and easy assembly, requiring no glue or special tools. Follow these general steps:
- Wing Attachment: Securely attach the main wings to the fuselage. Ensure all connections are firm.
- Tail Assembly: Mount the horizontal and vertical stabilizers to the rear of the fuselage. Verify proper alignment.
- Landing Gear Installation: Attach the tricycle landing gear. Confirm the steerable nose wheel operates freely.
- Propeller Installation: Install the propeller onto the motor shaft, ensuring it is correctly oriented and tightened.
A detailed front view of the E-flite Apprentice STS 1.5m RC Airplane, highlighting the propeller and nose wheel.
Close-up of the tail assembly, showing the vertical and horizontal stabilizers.
6. Setup
6.1 Binding the Receiver
As a Bind-N-Fly (BNF) Basic model, the Apprentice STS 1.5m comes with a Spektrum 6-Channel Receiver. You will need to bind this receiver to your compatible Spektrum DSMX/DSM2 aircraft transmitter. Refer to your transmitter's manual for specific binding procedures. Ensure the aircraft is powered on and the receiver is in binding mode before initiating the binding process from your transmitter.
6.2 Pre-Flight Checks
- Control Surface Check: Verify that all control surfaces (ailerons, elevator, rudder) move freely and in the correct direction in response to transmitter inputs.
- Battery Security: Ensure the flight battery is fully charged and securely installed in the aircraft's battery compartment.
- Propeller Clearance: Check that the propeller is free from obstructions and securely attached.
- Center of Gravity (CG): Confirm the aircraft's center of gravity is within the recommended range as specified in the full product manual.
7. Operating Instructions
7.1 SAFE Technology
The Apprentice STS 1.5m features exclusive SAFE (Sensor Assisted Flight Envelope) technology, which provides multiple flight modes to assist new pilots:
- Beginner Mode: Offers pitch and bank angle limits, automatic self-leveling, and assisted take-offs and landings. This mode is highly recommended for first flights.
- Intermediate Mode: Provides larger pitch and bank angle limits with self-leveling, allowing for more maneuverability while still offering stability assistance.
- Experienced Mode: Removes pitch and bank angle limits and self-leveling, providing full control for advanced maneuvers.
7.2 Take-Off
Position the aircraft into the wind on a smooth surface. Gradually increase throttle while applying slight up-elevator to lift off. The wide-stance tricycle landing gear aids in stable ground handling.
The E-flite Apprentice STS 1.5m RC Airplane with its tricycle landing gear, suitable for various surfaces during take-off or landing.
7.3 Flight
Maintain a safe altitude and distance. Practice gentle turns and altitude changes. Utilize the SAFE technology modes to gradually increase your control proficiency.
The E-flite Apprentice STS 1.5m RC Airplane soaring in the sky, demonstrating its flight capabilities.
Another view of the E-flite Apprentice STS 1.5m RC Airplane in stable flight.
7.4 Landing
Approach the landing area slowly, reducing throttle and maintaining a controlled descent. Use the rudder for directional control and elevator for pitch. In Beginner Mode, SAFE technology can assist with smoother landings.
The E-flite Apprentice STS 1.5m RC Airplane maintaining level flight over an open area, preparing for landing.
8. Maintenance
Regular maintenance ensures the longevity and performance of your Apprentice STS 1.5m RC Airplane:
- Inspection: Before each flight, inspect the airframe for any damage, cracks, or loose components. Check control surfaces, linkages, and propeller for proper function and security.
- Cleaning: Clean the aircraft after each flight, especially if flying in dusty or dirty conditions. Use a soft cloth to wipe down surfaces.
- Battery Care: Follow all instructions for charging, discharging, and storing LiPo batteries to prevent damage and ensure safety.
- Motor and ESC: Periodically check the motor and Electronic Speed Controller (ESC) for signs of wear or overheating.
- EPO Material: The durable EPO material is designed to withstand typical flying punishment. Minor dents or creases can often be repaired with heat or appropriate foam-safe adhesives.
9. Troubleshooting
This section addresses common issues you might encounter:
- Aircraft Not Responding: Ensure the transmitter and receiver are properly bound and powered on. Check battery levels in both the aircraft and transmitter.
- Poor Flight Performance: Verify the Center of Gravity (CG) is correct. Check for any damage to control surfaces or propeller. Ensure all control linkages are free and correctly adjusted.
- Motor Not Spinning: Check battery connection, ESC connection to the motor, and ensure the throttle trim is at its lowest setting.
- Unstable Flight: Re-check control surface throws and ensure SAFE technology is correctly configured for your skill level. Verify no damage to the flight controller or servos.
For more detailed troubleshooting or persistent issues, refer to the comprehensive product manual or contact E-flite customer support.
10. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 41.5 x 19 x 8 inches |
| Item Weight | 8.71 pounds |
| Model Number | EFL3750 |
| Manufacturer Recommended Age | 14 months and up |
| Release Date | August 23, 2018 |
| Manufacturer | Horizon Hobby |
11. Warranty and Support
For detailed warranty information and customer support, please refer to the documentation provided with your product or visit the official Horizon Hobby website. It is recommended to register your product to receive updates and support.
Horizon Hobby, LLC
2904 Research Rd.
Champaign, IL 61822
USA
