Maintenance and Modifications
True Blue Power Energizes SIAI-Marchetti S.211
Weighs 45 pounds less than lead-acid battery and provides faster and cooler engine start
Matthew Harrah and S.211 jet
Mid-Continent Instruments and Avionics and True Blue Power president and chief test pilot Matthew Harrah flew the company's SIAI-Marchetti S.211 to EAA AirVenture Oshkosh. © AIN/Matt Thurber

True Blue Power flew its SIAI-Marchetti S.211 military trainer/light-attack aircraft to EAA AirVenture Oshkosh 2026, following installation and performance validation of the TB50 True Blue lithium-ion main-ship battery.

Piloted by Mid-Continent Instruments and Avionics and True Blue Power president and chief test pilot Matthew Harrah, the S.211’s Pratt & Whitney Canada JT15D engine is exhibiting faster and cooler starts thanks to the battery. The S.211 is used for testing Mid-Continent and True Blue products.

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