1. Introduction
This manual provides detailed instructions for the iFlight BLITZ F7 55A 2-6S Stack, which includes the BLITZ F7 V1.2 Flight Controller and the BLITZ E55 4-IN-1 2-6S Electronic Speed Controller (ESC). This high-performance stack is designed for FPV (First Person View) drone applications, offering robust control and power management for your aircraft.
Product showcase video of the iFlight BLITZ F7 55A 2-6S Stack, highlighting its design and components.
2. Features
- Improved circuit design for enhanced performance and lower electrical noise.
- DJI HD VTX Connector for plug-and-play compatibility, eliminating the need for soldering.
- Integrated FC indicator LEDs for convenient visual debugging.
- Equipped with an LC filter for cleaner power delivery.
3. Specifications
3.1. BLITZ F7 V1.2 Flight Controller
| Component | Specification |
|---|---|
| MCU | STM32 F722 |
| Gyro | ICM42688 |
| Barometer | DPS310 |
| OSD Chip | AT7456E |
| Flash | 32MB (Blackbox flash) |
| UARTS | 6 |
| Motor Outputs | 4x (SH1.0 connector) |
| I2C Serial | SDA / SLA pads |
| VTX Protocol | Smartaudio / IRC Tramp supported |
| LED Controller | Yes |
| Beeper Pad | Yes |
| Firmware Target | IFRC-IFLIGHT_BLITZ_F722 |
| Mount Pattern | 30.5*30.5mm / 4mm PCB hole diameter |
| Dimensions | 36.5*35 mm |
| Weight | 7.8g |
| BEC | 5V 2.5A / 9V 2A |
3.2. BLITZ E55 4-IN-1 2-6S ESC
| Component | Specification |
|---|---|
| Mounting Holes | 30.5*30.5mm/Φ4mm |
| Weight | 15.3g |
| Lipo Input | 2-6S |
| MCU | G071 |
| Constant Current | 55 Amps |
| Burst Current | 65 Amps |
| Current Sensor | Yes |
| BEC | No |
| Current Rate | 200 |
| Supported Protocols | DShot DShot150/300/600/MultiShot/ OneShot etc. |
| Firmware Target | IFLIGHT_BLITZ_G3 32.9 |
4. Setup and Installation
4.1. Important Considerations
- Capacitor Requirement for Larger Drones: When using this ESC on a 7-10 inch drone, it is crucial to add an additional capacitor to prevent overloading the onboard capacitor of the ESC. This ensures optimal performance and reliability of your drone's power system.
4.2. Wiring Suggestions
The BLITZ F7 V1.2 Flight Controller offers multiple UARTs for various peripherals:
- UART 1: Typically used for VTX (Video Transmitter), supporting both HD and Analog systems.
- UART 2: Dedicated for connecting your receiver.
- UART 3/4/5: Available for GPS modules or other sensors that require a serial port connection.
- UART 6: Recommended for ESC Telemetry, allowing the flight controller to receive data from the ESC.
4.3. Wiring Diagram
Refer to the comprehensive wiring diagram below for detailed connection instructions for various components, including DJI Digital Transmitters, other receivers, VTX/CAM, LED/Buzzer, ESC, Anti-Spark filter, GPS, and Status indicators. Ensure all connections are made correctly to prevent damage to your components.
Detailed wiring diagram for the iFlight BLITZ F7 stack, illustrating connections for various FPV drone components.
4.4. Physical Installation
The stack features a 30.5x30.5mm mounting pattern with 4mm PCB hole diameter. Use the provided silicon grommets to isolate the flight controller from frame vibrations. Ensure proper orientation as indicated on the boards.
Various views of the iFlight BLITZ F7 55A Stack and its components.
5. Operating Instructions
Once the iFlight BLITZ F7 55A Stack is correctly installed and wired, you will need to configure it using appropriate FPV firmware, such as Betaflight or EmuFlight. Follow these general steps:
- Connect to PC: Use a USB-C cable to connect the flight controller to your computer.
- Install Drivers: Ensure all necessary drivers (e.g., DFU, VCP) are installed for your flight controller to be recognized.
- Flash Firmware: Open your preferred configurator software (e.g., Betaflight Configurator). Select the correct firmware target (IFRC-IFLIGHT_BLITZ_F722 for FC, IFLIGHT_BLITZ_G3 32.9 for ESC) and flash the latest stable version.
- Initial Configuration: Follow the configurator's setup wizard or manually configure settings such as accelerometer calibration, port assignments (for receiver, VTX, GPS), ESC protocols (DShot600 recommended), motor direction, and PID tuning.
- Receiver Setup: Bind your receiver to your radio transmitter and configure the receiver tab in the configurator to ensure correct channel mapping.
- VTX Setup: Configure your VTX settings (power, band, channel) via SmartAudio or IRC Tramp protocol, or manually if applicable.
- Pre-Flight Checks: Before flying, always perform thorough pre-flight checks, including motor spin direction, failsafe settings, and control surface responses.
6. Maintenance
Regular maintenance ensures the longevity and reliable performance of your iFlight BLITZ F7 55A Stack:
- Visual Inspection: Periodically check for any signs of physical damage, loose connections, or corrosion on the boards and connectors.
- Cleaning: Keep the flight controller and ESC clean from dust, dirt, and debris. Use compressed air or a soft brush for cleaning. Avoid using liquids directly on the electronics.
- Firmware Updates: Regularly check for and apply firmware updates for both the flight controller and ESC to benefit from performance improvements, bug fixes, and new features.
- Component Health: Monitor the health of connected components (motors, VTX, camera) as issues with these can sometimes manifest as problems with the FC/ESC.
7. Troubleshooting
If you encounter issues with your iFlight BLITZ F7 55A Stack, consider the following troubleshooting steps:
- No Power: Check battery connection, main power lead, and ensure no short circuits. Verify the BEC output if powering peripherals.
- Motors Not Spinning/Incorrectly: Verify ESC calibration, motor wiring order, and motor direction in the configurator. Check for bent motor shafts or damaged propellers.
- No Receiver Signal: Ensure receiver is correctly wired to the designated UART, powered, and bound to your transmitter. Check UART configuration in the flight controller software.
- No Video/Poor Video Quality: Check VTX and camera wiring, ensure VTX is powered, and verify VTX settings (band, channel, power) match your FPV goggles. Check for interference.
- Flight Instability: Review PID tuning, check for loose components, and ensure propellers are balanced and undamaged. Calibrate accelerometer.
- FC Indicator LEDs: Utilize the FC indicator LEDs for visual debugging. Consult the flight controller firmware documentation for the meaning of different LED patterns.
- Blackbox Logs: If enabled, analyze Blackbox logs for detailed flight data to identify the root cause of performance issues.
8. User Tips
- Proper Soldering: Always ensure clean and strong solder joints. Cold or weak solder joints are a common cause of intermittent issues.
- Test Before Flight: After any changes or repairs, always perform a bench test and a low-power hover test before full flight to ensure everything is functioning correctly.
- Cable Management: Secure all wires to prevent them from interfering with propellers or other moving parts, and to reduce electrical noise.
9. Packing List
The iFlight BLITZ F7 55A 2-6S Stack package includes the following items:
- 1 x BLITZ F7 V1.2 Flight Controller
- 1 x BLITZ E55 4-IN-1 2-6S ESC
- 1 x Set of silicon grommets
- 1 x Wire harness for F7 Flight controller
10. Warranty and Support
For warranty claims, technical support, or further assistance, please contact the manufacturer or your point of purchase. Ensure you retain your proof of purchase for any warranty-related inquiries. Always refer to the official iFlight website for the most up-to-date documentation and support resources.