fs35 First Engine Tests

28.11.2018 – We completed the next big step on the way to the first flight of the fs35!

Two weeks after the static vibration test we started our fs35 engine for the first time.

Together with a Technify employee, the special engine mapping for the fs35 was loaded onto the FADEC (full authority digital engine control ) and the engine installation was inspected. The engine manufacturer’s test routines, which were started via the CAN interface, went well. We then pushed the fs35 out of the ISD, at the university, and secured it at the parking lot with wheel chocks, as well as an aerotow rope between the towing hookup and a tree. In the first run, the injectors switched off and the high pressure pump and the starter were tested. Then the engine was started up with the injectors switched on, and ran smoothly. Since the lines for transmission fluid, coolant and motor oil are primed with the first engine start, motor oil and transmission fluid had to be refilled after the first few revolutions.

After topping off the engine, we let it warm up to carry out some tests. We tested the generator, battery, backup power supply, the function of the FADEC A and B, as well as the FADEC selector switch and the thermostat for the coolant system. For the latter, the coolant had to reach 85°C, which requires full throttle in autumn outdoor temperatures. But the aerotow rope seemed a bit too weak, so we secured the fuselage with additional straps on a trustworthy tree. At full throttle the coolant reached the intended temperature and the thermostat opened. At this point, all leaves behind the fuselage were blown away and we were thrilled how much more wind the fs35 creates compared to our G109 😉