# Fox Tail

Canonical: https://abierto.us/opportunities/darpaps26136

- Solicitation number: DARPA-PS-26-136
- Notice type: Solicitation
- Status: Open. Offers due January 29, 2027
- Department: Department of Defense
- Agency: Defense Advanced Research Projects Agency
- Contracting office: Def Advanced Research Projects Agcy (HR0011)
- NAICS: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- Product or service code: AC12 National Defense R&D Services; Department Of Defense - Military; Applied Research
- Who can bid, by location: Anywhere in the US. Location does not limit who can bid: a product shipped to the buyer, research at the performer's facility, or work at the contractor's site. A state shown is the delivery point.
- First posted: September 24, 2026
- Last posted: September 24, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/544aaeb3e0a148d1be7c36ca60d9e844/view

## Description

The Defense Advanced Research Projects Agency (DARPA) is soliciting innovative proposals in the general area of extreme-scale hydrodynamics, including, but not limited to, high amplitude wave propagation, very high Reynolds number flows, and abrupt phase changes. Proposed research should investigate innovative theoretical and computational modeling approaches relying on first principles-based closures of the governing laws of fluid motion under such conditions.

## Attachments

- [Attachment_E_Proposal_Volume_II__Cost_Proposal_.docx](https://sam.gov/api/prod/opps/v3/opportunities/resources/files/74a5304a99564c7c8bf36f93b5ae2665/download)

## Publications

- September 24, 2026: Solicitation, due January 29, 2027. Notice 544aaeb3e0a148d1be7c36ca60d9e844. https://sam.gov/workspace/contract/opp/544aaeb3e0a148d1be7c36ca60d9e844/view

## Points of contact

- BAA Coordinator, FoxTail@darpa.mil

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/darpaps26136.