APM2.9 APM2.8 flight controller board Support PPM apm2.6 2.8 upgraded internal compass for RC Quadcopter Multicopter Ardupilot RC Plane Quadcopter 45cm Martin folding carbon fiber

45cm Martin folding carbon fiber paddle / 4 pieces TL2948

Frsky version Built-in SPI Frsky receiver with telemetry(D8/D16 switchable)

2X40mm / 1

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APM2.9 APM2.8 flight controller board Support PPM apm2.6 2.8 upgraded internal compass for RC Quadcopter Multicopter Ardupilot RC Plane Quadcopter 45cm Martin folding carbon fiberAPM2. 9 is used in the same way as APM2. 6, 2. 8. The benefit is that APM 2. 9 supports PPM and SBUS receiver protocols. Why use the SBUS PPM protocol? The communication speed is fast, the wiring is simple, only one line is needed, unlike each channel of the PWM, the PWM communication speed is slower than PPM SBUS. The product supports the PPM receiver protocol and supports the PWM protocol. Before using this product, make sure your receiver is PPM