Sandia’s Mobile Gun Test Complex: The Davis Gun

Why It Matters

By delivering controlled, high‑velocity impacts at the exact location of interest, the Mobile Gun Test Complex shortens R&D timelines and improves data fidelity for weapons and infrastructure resilience.

Key Takeaways

• Mobile gun brings impact testing directly to target sites
• Davis gun uses reaction mass to cancel recoil and launch payload
• 16‑inch barrel fires 2,000‑lb penetrator at approximately ~1,200 ft/s
• Adjustable barrel angles enable precise impact angles and velocities
• System loads via winch, maintains concentric alignment for accuracy

Summary

Sandia National Laboratories’ Mobile Gun Test Complex showcases the Davis gun, a portable, high‑energy launch system that brings impact testing directly to the target environment rather than relying on fixed ranges or aircraft drops.

The complex houses three interchangeable barrels—16‑inch, 12‑inch and 8‑inch—each removable for rapid reconfiguration. The Davis gun operates by firing a solid steel reaction mass opposite the test article; the recoil‑absorbing slug balances forces, allowing a 2,000‑lb penetrator to exit at roughly 1,200 ft/s, equivalent to terminal‑velocity impacts.

In a recent demonstration, a 4,000‑lb reaction mass was fired at an 87° elevation, reaching about 5,000 ft altitude and landing roughly 1,000 ft downrange into a geologist‑selected soil target. Loading is performed with a trailer‑mounted winch, keeping the barrel vertical to preserve concentricity and seal integrity.

This mobility and precision enable realistic testing of munitions, armor, and engineered structures on‑site, reducing logistics costs and accelerating development cycles for defense and civil‑engineering applications.

Original Description

Watch Sandia Labs’ mobile Davis gun fire a BLU-109 earth penetrator into a specially selected geological target. The earth penetrator, or “bullet,” is shot from the Davis gun at speeds faster than the speed of sound, or Mach 1. A 4,000-pound steel reaction mass exits from the top of the barrel, soaring one mile high before it falls about 1,000 feet downrange.

Sandia’s Davis gun allows researchers to bring tests directly to the target, whether natural geology or engineered structures, with precise control over impact angle, speed, location and timing. This capability offers a significant advantage over other testing methods, like aircraft drops.

Sandia's Mobile Gun Test Complex includes three guns with interchangeable barrels in 16-inch, 12-inch and 8-inch sizes, providing flexibility for different experiments.

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