1. However the aircraft always stalls at the same critical angle of attack. 2. A swept wing has a lower, flatter curve with a higher critical angle . 3. The critical angle is normally measured by looking through a telescope. 4. Symmetric airfoils have lower critical angles ( but also work efficiently in inverted flight ). 5. We did an experiment in class to find out what the critical angle of glycerol is. 6. There is an easy way to check this critical angle without having to measure distances or lengths. 7. Digital refractometers also find the critical angle , but the light path is entirely internal to the prism. 8. The critical angle can be calculated using; 9. The critical angle of attack in steady straight and level flight can be attained only at low airspeed. 10. As speed reduces, angle of attack has to increase to keep lift constant until the critical angle is reached.
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