The HDZero Halo Stack combines the Halo Flight Controller and Halo 4in1 70A ESC into a race-ready powertrain, engineered by HDZero—leaders in high-performance digital FPV systems. Designed for power, reliability, and ease of assembly, this stack is the ultimate solution for competitive racing and freestyle pilots. Package Includes: 1x HDZero Halo FC 1x HDZero Halo ESC 1x ESC cable (8-pin SH1.0, 30mm) 1x XT60 cable (70mm,12AWG) 1x 35V/1000uf capacitor 9x Rubber grommet (4.5mm height) 6x Rubber grommet (6.6mm height) 5x Nylon washer (M3 1.0mm thick) 5x 304 Steel nuts (M3 2.3mm thick) 4x 12.9 Carbon steel screws (M3 25mmlength) 1x ELRS T-sharp short antenna (40mm) 1x ELRS T-sharp long antenna (90mm) 2x ELRS Antenna retainers With its clean layout, minimal wiring, and integrated components, the HDZero Halo Stack is the easiest way to build a professional-grade racing drone—without sacrificing performance, reliability, or serviceability. At its core is the Halo 4in1 70A ESC, built for extreme durability and responsive throttle. A split-board design separates control and power stages, improving thermal performance and crash resilience. With 24 MOSFETs across an 8-layer PCB using 3oz copper per layer and a rear-mounted copper bar, the Halo ESC delivers exceptional burst throttle response with minimal voltage drop. Rated for 70A continuous per motor and 100A bursts, the ESC supplies clean, stable power while protecting sensitive electronics from voltage spikes. A conformal coating adds moisture, dust, and corrosion resistance. Choose between BLHeli32 or AM32 firmware based on your preference. The Halo Flight Controller simplifies your build while delivering professional-grade control. Powered by an H7 processor, it integrates a Gemini true diversity ELRS receiver, using dual independent receivers for rock-solid control link stability. A TXCO (temperature-compensated crystal oscillator) maintains consistent ELRS performance even in extreme temperatures—essential for race conditions. The integrated ELRS RX not only simplifies quad assembly but also provides a cost-effective solution. With the Gemini ELRS RX typically priced at $25, this combination represents significant savings compared to purchasing separate ELRS receivers and flight controllers. Built for digital video systems, the Halo eliminates the analog OSD chip to reduce costs and save space. It is specifically designed to allow the HDZero Race v3 VTX to stack on top of it in a low-profile manner, resulting in a durable and compact stack height. This optimization ensures a secure, space-efficient build while maintaining excellent performance. The Halo FC requires no soldering for VTX, receiver, or ESC connections. Everything plugs directly into dedicated sockets using included cables, making assembly and field repairs fast and frustration-free. This low-profile, modular design results in a tidy, durable racing stack. The switchable 9V BEC powers your HDZero VTX, with remote control over power via Betaflight to simplify pit stops and extend VTX lifespan. A separate 5V/4A BEC is capable of powering an entire competition-grade LED setup without the need for external regulators. The Halo Flight Controller is available in two versions, MPU6000 and ICM42688, to meet different pilot preferences. Halo Flight Controller Plug-and-play HDZero race build – no soldering required for RX, VTX, or ESC connections Integrated Gemini true diversity ELRS receiver for superior control link stability TXCO-enhanced ELRS performance in high-heat race environments H7 processor for fast, responsive control Dedicated switchable 9V/3A BEC to power HDZero VTX, controlled via Betaflight Powerful 5V/4A BEC supports full competition LED kits Optimized for low-profile stacking with HDZero VTX Optional MPU6000 or ICM42688 gyros Betaflight firmware (HDZERO_HALO target) Halo 4in1 70A ESC Split-board architecture with copper bus bar for optimized burst throttle response 8-layer PCB with 3oz copper per layer and 24 MOSFETs Continuous 70A per motor / 100A burst (3 seconds) Exceptionally clean power delivery protects flight controller from voltage spikes Conformal coating for moisture, dust, and corrosion protection Dual-sided motor solder pads for flexible builds Firmware options: BLHeli32 or AM32 Telemetry support Supports 3S to 8S batteries (9V–40V input)
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