Thanks for making these available, Professor Smith. My intuition is that stall would act as a self-regulating mechanism to prevent torsional divergence: incidence increases until the wing stalls, then lift goes to 0, and you go back to alpha'. Where am I going wrong?
Stall could act as a regulatory mechanism but it’s not guaranteed that stall will occur before torsional damage has occurred. Furthermore, stall gives rise to aerodynamic nonlinearities and vibrations that can feed into dynamic aeroelastic phenomena.
The spitfire will really never experience divergence velocity? Does that mean it will never have its wings snap off, no matter how fast it goes? (If so, that's so cool)
That’s exactly what it means. Its wings might snap off from the load factor being too high, but torsional divergence is impossible because its elastic axis is ahead of the centre of pressure.
If I were producing them for RUclips, then perhaps? But these were recorded for a senior level class at university where students want to see the maths rather than a handwavey “ah, you can derive this at home”.
Thanks for making these available, Professor Smith. My intuition is that stall would act as a self-regulating mechanism to prevent torsional divergence: incidence increases until the wing stalls, then lift goes to 0, and you go back to alpha'.
Where am I going wrong?
Stall could act as a regulatory mechanism but it’s not guaranteed that stall will occur before torsional damage has occurred.
Furthermore, stall gives rise to aerodynamic nonlinearities and vibrations that can feed into dynamic aeroelastic phenomena.
The spitfire will really never experience divergence velocity? Does that mean it will never have its wings snap off, no matter how fast it goes? (If so, that's so cool)
That’s exactly what it means.
Its wings might snap off from the load factor being too high, but torsional divergence is impossible because its elastic axis is ahead of the centre of pressure.
@@AeronauticalEngineering Wow. What can't the spitfire do?
Hi brother, I trust the maths will check out. If you could omit going step by step it will make these videos shorter and more easy to digest
If I were producing them for RUclips, then perhaps? But these were recorded for a senior level class at university where students want to see the maths rather than a handwavey “ah, you can derive this at home”.
That said - I could perhaps make some smaller videos with just concepts. I’ll have a think! (And see if it’s okay with my current employer…)