Ed Dartford
Well-Known Member
I posted a report regarding "Plastic" props and the experience with them during test flights of the RANS S21 that my son is buying.
Further flight testing revealed another problem that needs to be fixed. The Rotax 915 in his plane is a turbocharged engine rated at 141 HP. The sophisticated fuel injection system uses the temperature of the intake air as a control input. Apparently the sensor got located too close to something hot, and is giving bad data and generating an alarm. All these fancy devices cause most of the problems that I see in cars, and planes.
He chose the Rotax engine over a Titan 340 engine which is normally asperated. The 180 HP Titan slightly shortens the takeoff run, but the Rotax weighs less and runs on auto gas which is why my son chose it. However flight testing reveals another benefit. Two RANS S21 planes were flown side by side, one with the Titan engine and the other with the Rotax.
Further flight testing revealed another problem that needs to be fixed. The Rotax 915 in his plane is a turbocharged engine rated at 141 HP. The sophisticated fuel injection system uses the temperature of the intake air as a control input. Apparently the sensor got located too close to something hot, and is giving bad data and generating an alarm. All these fancy devices cause most of the problems that I see in cars, and planes.
He chose the Rotax engine over a Titan 340 engine which is normally asperated. The 180 HP Titan slightly shortens the takeoff run, but the Rotax weighs less and runs on auto gas which is why my son chose it. However flight testing reveals another benefit. Two RANS S21 planes were flown side by side, one with the Titan engine and the other with the Rotax.
