iFlight BLITZ F7 Stack (E55S 4-in-1 ESC)

The iFlight BLITZ F7 Stack pairs a feature-rich F722 flight controller with the robust E55S 55A 4-in-1 ESC, designed for 5-inch freestyle quads, 7-inch long-range builds, and heavy-duty cinelifters. Based around a standard 30.5x30.5mm mounting pattern, this stack provides native plug-and-play compatibility with digital HD systems like the DJI O3 Air Unit, reducing complex VTX soldering while delivering stable onboard BEC power to your video transmission gear.

Key features

• STM32 F722 processor handles complex PID loops and high-rate Betaflight features without CPU bottlenecking.
• E55S ESC delivers 55A continuous and 65A burst current, capable of driving aggressive 6S freestyle motors.
• Integrated 9V/2A and 5V/2.5A BECs ensure stable independent power for digital VTX hardware, receivers, and GPS modules.
• Six full hardware UARTs allow simultaneous connection of ELRS/Crossfire receivers, HD video, telemetry, and GPS peripherals without port-sharing constraints.
• Pre-installed connector allows direct harness wiring to common digital FPV transmitters.

Specifications

• MCU: STM32 F722RET6
• Gyro: BMI270
• Input Voltage: 2-6S LiPo
• Continuous Current: 55A
• Burst Current: 65A
• ESC Firmware: BLHeli_S (Supports DShot300/600)
• FC Firmware Target: IFLIGHT_BLITZ_F722 (Betaflight)
• BEC Output: 5V 2.5A / 9V 2A
• UARTs: 6
• Mounting Pattern: 30.5x30.5mm

This stack includes vibration-damping silicone grommets to isolate the gyro from motor resonance, ensuring cleaner trace data for tuning. The 8-bit E55S ESC ships with BLHeli_S firmware and is fully compatible with Bluejay flashing to enable bidirectional DShot and RPM filtering.