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Efforts Renew to Understand Dangers of Mountain Flying

Steve Scott
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A research project in California's Sierra Nevada mountains is attempting a major leap forward in unraveling the mysteries surrounding one the biggest atmospheric hazards in modern aviation -- a wind phenomenon known as a "mountain rotor." Both rotors and a related phenomenon, mountain waves, regularly form on a mountain's lee side, or on the side opposite the direction from which strong winds typically blow. Just such a site is in Owens Valley, Calif., which is between the Sierra Nevada and…

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Contract Updates

CORRECTION: The contract announced on Sept. 29 2025 (for A-GAS US Inc., Bowling Green) – $31,442,629

CORRECTION: The contract announced on Sept. 29, 2025, for A-GAS US Inc., Bowling Green, Ohio (SPE4A7-25-D-0386) for $31,442,629 was not awarded.  

UPDATE: Somo Lens LLC (Santa Fe Springs, California (SPE2DF-26-D-0004) – $37,500,000)

UPDATE: Somo Lens LLC,* Santa Fe Springs, California (SPE2DF-26-D-0004, $37,500,000) has been added as an awardee to the multiple award contract for optical lens program for the Defense Logistics Agency Electronic Catalog, issued against solicitation SPE2DE-24-R-0002 and awarded on May…

UPDATE: Hologic Sales and Service LLC (Marlborough, Massachusetts (SPE2D1-26-D-0005) – $95,000,000),

UPDATE: Hologic Sales and Service LLC, Marlborough, Massachusetts (SPE2D1-26-D-0005, $95,000,000), has been added as an awardee to the multiple award contract for medical equipment and accessories for the Defense Logistics Agency Electronic Catalog, issued against solicitation SPE2DH-21-R-0002 and awarded Feb.…

Vertex Aerospace LLC (Madison, Mississippi) – $

Vertex Aerospace LLC, Madison, Mississippi, was awarded an undefinitized contract action with a not-to-exceed price of $ 20,995,905 for F-16 Systems Program Office Foreign Military Sales (FMS) support. This contract action involves FMS support for contractor logistics support (CLS) for…

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