Shaluoman CC3D Revolution Flight Controller & Oplink Mini Radio Transceiver & M8N GPS & Distribution Board The OpenPilot Revolution board, also called 'Revo', is a new breed of Autopilot using the STM32F4 series, 210MIPS ARM Micro-controller. This is important, as it contains a hardware floating point unit (FPU), which is a huge advancement for hobby-class autopilots. Of course, OpenPilot has been 32bit since day one, and the FPU is another step up the performance ladder. The FPU allows precise, low-latency processing of real-life measurements using advanced attitude estimation algorithms. The Revolution is a flight control computer with autopilot, intended for multirotors, helicopters and fixed wings. It is a full 10DOF with gyroscope, accelerometer, magnetometer and pressure sensors. The board features a built-in 433MHz OPLink Modem. OpenPilot products use the standard OpenPilot footprint, and hence has the same dimensions and mounting holes as the OpenPilot CC. CC3D, Revo, GPS, OSD and PipX boards. Please be aware that not all receivers can be configured to use a PPM output. It is the user's responsibility to research this feature in regards to the desired receiver they wish to use for PPM and ensure it can be used as such. Many hours of frustration can occur while trying to troubleshoot why you can't get your radio to connect to the board with PPM if using a receiver than isn't designed with that feature! Simply make sure the receiver can do it before trying to set it up that way.