3 ms·
Note that AoA and the angle of the airframe body (relative to the horizon) may not be the same. Even if the airframe is pointing downwards (below the horizon) o
by wereHamster 8y ago
Note that AoA and the angle of the airframe body (relative to the horizon) may not be the same. Even if the airframe is pointing downwards (below the horizon) or really high up doesn't mean the wings have a sufficient AoA to generate lift.
- rational_indian 8y agoCan't the IMU sense if you are generating lift (or not)?
- t0mas88 8y agoNo, because you can stall a wing at any attitude realtive to the horizon. It isn't about the pitch of the airplane, it's about the relative airflow over the wings. So if you're falling quickly the airflow comes from "below" which causes a high angle of attack even if the nose is pointing level compared to the horizon.
- wereHamster 8y agoI'm doubtful. Consider this: the aircraft can experience a downward acceleration (eg. due to turbulences) without being in a stall. Measuring the AoA is still the most reliable way (assuming the sensor itself is reliable) to detect impeding stall.
- ddalex 8y agoThat's a very interesting thought. How would you do it? You can only sense the acceleration - if it's lower than 1G you're falling. The angular momentum doesn't actually tell you anything in an aircraft. I wonder if it's possible to estimate the local air speed based on ground speed (GPS) and local weather data (can we measure wind speed at altitude?).