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Project CALLISTO

Ministry of DefenceUnited Kingdom

Purchaser

Ministry of Defence

Country

United Kingdom

Notice published

6 Jul 2026

Tenqual indexed

7 Jul 2026

Closing date

27 Jul 2026

Source ID

Docs found

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Tender summary

Project CALLISTO Requirement: Affordable, single use engines for current and future air systems, munitions & One Way systems, to bridge the performance gap between hobbyist, model aircraft engines and higher performance, long-life & more exquisite engines. This phase will consist of design, development and ground testing (in appropriate engine test facilities) of Qty 4 prototype engines. The engines must be affordable and scalable. Any future scaled production requirement is not included under this competition, and if required shall be subject to a separate procurement. LOTS: This procurement is split into TWO Lots: LOT 1 CALLISTO LIGHT is for a smaller, less powerful engine (750N) LOT 2 CALLISTO HEAVY is for a more powerful engine, (1.8-2kN) Tenderers are able to bid for one or both lots. Full details of the requirement and anticipated dates can be found in the linked ITT. Tenderers wishing to take part must submit an ITT on the Defence Sourcing Portal no later than the specified closing date.

What to check before bidding

  • Issued by Ministry of Defence.
  • Located in United Kingdom.
  • Source notice 36585cd2-b044-47cb-81f0-e6139352fa45-904877 on uk.
  • Notice published 6 Jul 2026; Tenqual indexed it 7 Jul 2026.
  • Deadline listed as 27 Jul 2026.
  • Create a free tender alert to catch similar opportunities before the deadline pressure starts.