Astronics Corporation is to supply the Frequency Converter Unit (FCU) for the NASA and Boeing Transonic Truss-Braced Wing (TTBW) X-66 demonstrator. In addition to designing the FCU, Astronics will support ground and flight testing, which is scheduled to begin in 2028.

The FCU converts the output of the adapted 115VAC, 3-phase Variable Frequency Generator to 115VAC, 3-phase, constant frequency (400 Hz) power. This allows the aircraft to continue using existing onboard systems and loads qualified for 400Hz constant frequency.

Astronics president Jon Neal says: “Built on Astronics’ proven technology platform, the Frequency Converter Unit offers unparalleled efficiency and reliability, tailored to meet the unique demands of this groundbreaking aviation project. Being part of this collaboration with Boeing and NASA is an honour. We believe our advanced frequency conversion technology will play a critical role in the successful testing and operation of the X-66 demonstrator, helping to advance the goal of more sustainable aviation.”

Astronics has supplied electrical power system products to Boeing across its commercial and defence programmes. The TTBW programme aims to support the industry-wide objective of reaching net-zero emissions by 2050.