Noveske has announced their latest offering for the AR-15 pattern with the DDF or Disruptive Deep Flute Barrel Contour.
Noveske states “The Disruptive Deep Flute (DDF) is an external barrel contour designed to significantly reduce primary (blast compression and expansion) and secondary (sinusoidal resonance) wave events in barrels, improving accuracy, reducing heat, and extending barrel life. Using data from the 2024 TACOM HO Finite Element Analysis (FEA) study led by Al Harral at Lawrence Livermore National Laboratory, Noveske’s Combat Systems Development & Support program launched an R&D project. The goal was to determine the optimal surface area per linear inch to effectively disrupt these wave events while maintaining the lightweight barrel contour already used by U.S. Special Operations personnel.”
KEY BENEFITS:
ACCURACY
Constriction of the barrel’s Second Moment of Area (axial flexion) by increasing the barrel’s moment of inertia (structural/material resistance to
flexion), vastly reduces load irregularities translated from the barrel to the projectile in accelerated transit down the rifled bore. This reduction in multi-axis
wave mode functions allows the longitudinal axis of the projectile to remain better aligned with its velocity vector, thus decreasing precessional instability and increasing trajectory resilience.
THERMAL DAMPING
As a byproduct of the drastic reduction in vibration facilitated by the Noveske DDF contour, transfer of kinetic energy into thermal energy as Variable Heat is reduced by 10%, while the cooling speed of the barrel is increased by 200%.
BARREL-LIFE INCREASE
Material failure in barrels is caused b the exertion of a force impulse where in the flexion derived by that force exceeds the material stiffness provided by its temperature moment. The Noveske DDF contour reduces both the flexion imposed on the barrel by the accelerated force impulse and maintains a higher material stiffness due to its ability to maintain a lower temperature, thus increasing barrel life well beyond that of standard contour barrels of the same given metallurgy.
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