Hi Homebuilders... In my conquest to build my first airplane, RAI-1 XR “Tango XR”, | Revolution Aviation Inc., why not go all out and build your own engine (Rx8) and ECU. This thread will be the R&D of an ECU designed for the aviation rotary. We honestly don't have many options out there. Tracey Crook was the only one, which is no longer in production and Megasquirt which isn't geared towards aviation (no redundancy, and limited analog inputs). My goal is to have dual redundancy on everything from sensors, power supplies to the microchip itself. My micro-controller of choice is the PIC32MX470F512H. 120MHz, 512KB program memory, 128KB RAM, 12KB flash, 28 Analog/Digital converters. 5 16bit timers PIC32MX470F512H - 32-bit PIC Microcontrollers Inputs Tach 1 Tach 2 * Manifold Absolute Pressure 1 - Front rotor Manifold Absolute Pressure 2 - Rear rotor Intake Air Temp 1 Intake Air Temp 2 Coolant Temp 1 - Before radiator Coolant Temp 2 - After radiator Coolant pressure Oil Temp 1 - Before radiator Oil Temp 2 - After radiator Oil pressure Fuel Pressure Mass Air flow Sensor 1 Mass Air flow Sensor 2 O2 Wideband Sensor 1 - Front rotor O2 Wideband Sensor 2 - Rear rotor Exhaust Gas Temp 1 - Front rotor Exhaust Gas Temp 2 - Rear rotor Exhaust Gas Temp 3 - After collector Exhaust Gas Temp 4 - Near exit Cylinder Head Temp 1 - Front leading Cylinder Head Temp 2 - Front trailing Cylinder Head Temp 3 - Rear leading Cylinder Head Temp 4 - Rear trailing Knock Sensor 1 Knock Sensor 2 *Tach 2 = currently RX8 only has 1 Tach, but if someone could come up a bracket to have another Tach 180degrees would be nice) Outputs Injector Front A Injector Front B Injector Rear A Injector Rear B Coil Front leading Coil Front trailing Coil Rear leading Coil Rear trailing Oil Metering Pump - Remove OEM unit and build DYI * *With RX8 having side exhaust, along with premixing oil in the fuel, I want to create my own 2 stroke oil reservoir that will inject oil onto the side seals based on RPM. Operations For engine operation, we only need 1 tach, MAP, IAT, CLT. The rest will be used for logging / display purposes. Have control of each spark plug and coil. Speed-Density and/or Mass Air flow will be used to calculate fueling. The PIC should have enough room for ignition tables 16 x 16. The human interface will be from Android tablet program via bluetooth. Allowing to change fuel and timing in real-time and monitoring all sensors. This will be a huge endeavor, but I believe the Rotary engine is the future for GA planes. Anyone with C programming or hardware design, by all means help out. Also on the hardware side of things, keep on eye out at cimarron for CNC products.