F-35 Block Four testing includes two types of F135 engine

More from Air Warfare

• Italy moves to procure third batch of 29 AW249 helicopters

  The €1.22 billion (US$1.41 billion) follow-on order for the additional helicopters will complement the 19 AW249 already ordered by Italy.

• October Drone Digest: Growing desire for CCAs and new VTOL technology unveiled

  During October 2025, several countries and organisations signalled their intention to acquire loyal wingman uncrewed aircraft systems — designated by the US Air Force as Collaborative Combat Aircraft — or to study the capability further, while various new uncrewed helicopters were showcased.

• Australia starts upgrade programme for P-8A Poseidon fleet

  The upgrades will work to strengthen the country’s maritime surveillance and anti-submarine capabilities, with one more aircraft due to be delivered by 2026.

• Textron firms up potential bid for US Navy Undergraduate trainer contract

  The company has said it would assemble its Beechcraft M-346N aircraft at its east Wichita campus with significant investment placed to modernise the hub if it wins the contract.

• Airbus to position Eurofighter Typhoon for Portugal’s F-16 replacement requirement

  The MoU with AED Cluster Portugal will see the two organisations work together on studies to create a pitch to replace the country’s current F-16 fleet.

• PGZ and Anduril to work on Polish variant of Barracuda-500M missile

  The memorandum of understanding signed also included a wider strategic plan to co-develop autonomous air systems for the Polish Armed Forces.