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FederalSolicitationOpen Federal notice

Fox Tail

Defense Advanced Research Projects Agency (DARPA)› Def Advanced Research Projects Agcy

Solicitation # DARPA-PS-26-136Updated Nov 13, 2026Scored Nov 13, 2026

Responses due

Jan 29

Jan 29, 2027, 4:00 PM EST

Posted Sep 24Due Jan 29

Summary by RFP Detector

What this RFP is about

Defense Advanced Research Projects Agency (DARPA) (Def Advanced Research Projects Agcy), part of the Department of Defense, posted a solicitation titled “Fox Tail” under solicitation number DARPA-PS-26-136. It was posted on Sep 24, 2026. Responses are due Jan 29, 2027, 4:00 PM EST. It is classified under NAICS 541715 and product/service code AC12. No set-aside is listed. 7 documents are attached to the notice. The listed point of contact is BAA Coordinator.

Key facts

RFP Detector Score

Score breakdown

Every RFP starts at 50. Each factor adds or subtracts points compared with a typical RFP; unknown data counts as neutral.

Starts at 50

  • Value+6.2estimated

    No value published. Typical award is about $1.8M: the median of 314 DARPA contracts over $25K awarded in NAICS 541715, FY24–FY26.

  • Competition & access+0.3measured

    Full and open competition. The largest recipient took 21% of these dollars in FY24–FY26.

  • Issuer & market+6.1measured

    DARPA obligated $3.2B on NAICS 541715 across 314 contracts in FY24–FY26. 53 other notices from this office in the past 12 months.

  • Time & stage+11.0measured

    Solicitation, bids due: 77 days to respond (due Jan 29, 2027, 4:00 PM EST). Long lead time.

  • Clarity & completeness−2.4measured

    7 documents, named contact with email, 61-word description.

  • Freshness+5.4measured

    Updated today (new documents).

50 + contributions = 77 (B, Strong)

Informational, not advice to bid or not bid. Score version 1.0.0, evaluated Nov 13, 2026.

Requirements & submission

Eligibility · Full and open competition

Full and open competition means the notice states no set-aside: any responsible business can respond, subject to the requirements in the notice.

Not stated in a form we could extract. See the official solicitation for requirements, evaluation criteria and submission steps.

From the official notice

Description

61 words

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.

Timeline & history

1 change since posting.

  1. Solicitation posted

  2. Documents updated

  3. Responses dueNext · in 76 days

  4. Archive date on the official notice

Documents

7 files
  • DOCX

    Attachment_K_CLASSIFIED_ADDENDUM_AND_SECURITY_CLASS_GUIDE_REQUEST_FORM.docx

    DOCX

  • XLSX

    Attachment_F_DARPA_Cost_Proposal_Spreadsheet.xlsx

    XLSX

  • DOCX

    Attachment_E_Proposal_Volume_II__Cost_Proposal_.docx

    DOCX

  • PDF

    DARPA-PS-26-136.pdf

    PDF

  • DOCX

    Attachment_J_Representations_and_Certifications.docx

    DOCX

  • XLSX

    Attachment_I_Schedule_of_Milestones_and_Payments.xlsx

    XLSX

  • DOCX

    Attachment_G_Model_Other_Transaction_for_Agreement.docx

    DOCX

Files open on the official notice. RFP Detector doesn’t re-host notice documents.

Signed-in members can open each file. Sign in free to open the official solicitation

Contacts

Points of contact as published on the notice.

Federal award history

Market context

Defense Advanced Research Projects Agency · NAICS 541715 · FY24–FY26

Typical award (over $25K)
$1.8M
Contracts awarded
314
Total obligated
$3.2B
Award size, Defense Advanced Research Projects Agency · NAICS 541715 contracts, FY24–FY26 (log scale)
P25 $361.8KMedian $1.8MP75 $4.0MP90 $9.2M

Largest recipients in this market

  • LOCKHEED MARTIN CORPORATION$654.4M21%
  • THE JOHNS HOPKINS UNIVERSITY APPLIED PHYSICS LABORATORY LLC$650.3M20%
  • AURORA FLIGHT SCIENCES CORPORATION$125.1M4%

Recipients of past awards in this market, not the incumbent of this RFP.

View as table
Fiscal yearObligated ($)
FY20221,246,258,421.94
FY20231,128,467,244.31
FY20241,258,617,137.12
FY20251,177,480,881.04
FY2026745,020,507.27

Federal contract award records, award types A–D, FY24–FY26. Updated Nov 13, 2026.

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About this notice

Official federal notice. Updated Nov 13, 2026.

Official solicitation:Sign in free to open the official solicitation

RFP Detector is an independent service and is not affiliated with any government agency. Scores are informational.

RFP Detector is not affiliated with the organization that issued this RFP. Always rely on the official notice and confirm every date and requirement with the issuer.