Lectura técnica interesante:
Varmint Al's Fluted Barrel Stiffness Analysis
resumen:
"CONCLUSION ON BARREL FLUTING....
When comparing two barrels of equal weight, length, and material but one is solid and other is fluted, the fluted barrel will have:
- A larger diameter
- Greater stiffness (depending on how the extra diameter/weight is distributed)
- Vibrate at a higher frequency (depending on how the extra diameter/ weight is distributed)
- Less muzzle sag (depending on how the extra diameter/ weight is distributed)
Fluting a solid barrel will:
- Reduce its weight
- Reduce its stiffness
- Increase its natural frequency of vibration
- Decrease its muzzle sag.
Reducing the weight of a barrel by fluting makes a stiffer barrel than reducing the weight by decreasing its diameter.
A shorter barrel of the same section, solid or fluted, will sag less and vibrate at a higher frequency."
Con respecto a este último punto, hay que recordar que el largo del cañon es importantísimo, pues los cañones flotantes (los mas usados en precision) están en voladizo, anclados en la acción que a sus vez está sujeta a la culata. La defleccion en la punta del caño varía con la longitud elevada al cubo.... esto significa que un caño de 20" es 1,73 veces mas rigido que uno de 24". Mayor rigidez implica también mayor magnitud de las ondas vibratorias, y mayor frecuencia.
Un muy buen artículo al respecto:
Lilja Precision Rifle Barrels - Articles: The Ideal Barrel For A .308 Caliber Tactical Rifle