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Pratt & Whitney clears F-35 engine upgrade design review and licenses F100 production to Hermeus

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Pratt & Whitney says its F-35 engine enhancement has passed a risk-reduction design review, advancing improvements in longevity, thrust and fuel efficiency. Separately, the company has licensed Hermeus to manufacture the F100-PW-229 for its Quarterhorse Mk 2, supporting the hypersonic aircraft developer’s next phase of development.

Discovered 2026-09-15T04:50:42.299235-07:00 | 2026-09-15T04:50:42.299235-07:00

Briefing

What Hype is tracking

  • The F-35 engine upgrade has cleared a key design milestone, supporting planned gains in engine life, thrust and fuel efficiency across a major combat-aircraft fleet.
  • Licensing F100-PW-229 production to Hermeus gives the Quarterhorse Mk 2 program an established military-engine design and an industrial pathway for its next-generation aircraft.
  • The developments illustrate how incumbent propulsion technology is being extended both through fleet upgrades and into emerging high-speed unmanned-aircraft programs.

Reported By

19fortyfive.com rtx.com insidedefense.com APAC Defence Reporter Aviation Week Breaking Defense
Sources Tracked
18
First Seen
2026-09-15T04:50:42.299235-07:00
Latest Update
2026-09-15T16:28:05.620402-07:00
Coverage
Defense

Sources

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