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Latest News in Testing, Inspection and Certification

NTS News Center - Latest News in Testing, Inspection and Certification

How will MIL-DTL-901E affect your shock qualification?

Photo: Navy.com

For the past 30 years, MIL-S-901D has defined requirements for shock qualification of items installed on U.S. Navy Combatants. For the duration of this period, there have been rumors of a new and improved specification revision. That time has finally come.

MIL-DTL-901E, revision to MIL-S-901D of 1989 has been approved and released as of 20 June 2017. The new “detail specification” or DTL per DOD 4120.24M is an evolutionary document that includes changes from MIL-S-901D, Interim Change #2, the 2012 DSCR-2 initiative clarification letters and cost reduction strategies, and the Total Ownership Cost (TOC) reduction provided by the Deck Simulating Shock Machine (DSSM).

For most Navy shipboard shock practitioners, the most impactful change to the document is the addition of the Medium Weight Deck Simulating Shock Test.  This test is primarily performed on Class II, deck mounted equipment and utilizes the DSSM. The DSSM is typically used in lieu of performing a heavyweight shock test series.

The DSSM shock test machine at NTS Rustburg

In the early 2000s, we recognized that the current model for shock qualification of a vast majority of the proliferating Class II, Deck Mounted, COTS equipment was not sustainable from a costs and schedule perspective.

So, in collaboration with HII-NNS partners, NTS led the pioneering development of a more cost and schedule effective land-based approach to meet this new challenge. These efforts culminated in the fabrication of the DSSM Generation I machine that has been in use at NTS Rustburg, VA since 2004.

The success of the Generation I DSSM led to the development of a scaled-up Generation II machine that is specified in MIL-DTL-901E. All of the certification testing that was necessary prior to inclusion in the new MIL-DTL was conducted at NTS. We have been routinely conducting shock qualification testing on the DSSM as an Alternate Shock Test Vehicle since 2015.

The DSSM development is yet another example of NTS’ focus on customer driven innovation. If you have questions concerning the new MIL-DTL-901E detail specification and how it may affect your program or have a need for Medium Weight Deck Simulating Shock Tests contact our experts today!

Environmental Testing Coming to Colorado!

NTS is pleased to announce that our Longmont, Colorado facility is now offering environmental testing starting in September, 2016. In addition to our current world-class EMI capabilities we can now provide:

DynamicsNTS Longmont Ling 335 shaker

  • Electro Dynamic Shakers:
    Sine, Random, Classical Shock
  • Shock Testing:
    Aircraft, Transportation, Bump
  • Constant Acceleration, Crash Safety

Environmental/ClimaticChamber 59 w car

  • Thermal Cycling
  • Temperature/Humidity
  • Temperature Shock
  • Temperature/Altitude

Whether you need to qualify for MIL-STD 810, MIL-STD 167, MIL-STD 1540 or RTCA DO-160, we can answer any questions you might have. When you are ready, our team can provide a competitively priced testing proposal and scheduling to fit your needs.

Click here to learn more about the NTS Longmont expanded capabilities.

NTS Silicon Valley Opening New Test Laboratory

Climatic, Environmental and Dynamics Testing Capabilities Added To Portfolio of Services
NTS Silicon Valley division is adding a new custom-built Climatic, Environmental and Dynamics Product Testing Laboratory in close proximity to their existing test laboratories in Fremont and Sunnyvale, California. The new location is over 30,000 square feet, and will house a wide range of state-of-the-art testing equipment.

More details can be found in the NTS press release.