Tow Tractor A hydrogen fuel cell-powered U-30 Aircraft Tow Tractor tows a KC-135 Stratotanker assigned to the Hawaii Air National Guard’s 203rd Air Refueling Squadron at Joint Base Pearl Harbor-Hickam, Hawaii, July 18, 2019. The Air Force Research Laboratory conducted the demonstration on behalf of the Hawaii Center for Advanced Transportation Technologies. This was the first demonstration on a large Air Force aircraft using the hydrogen fuel cell equipment. The project is a proof-of-concept demonstration to validate hydrogen fuel vehicle technologies in supporting Air Force mission requirements. SHARE: Download: Full Size (1.14 MB) Tags: ENERGY Credit: Hawaii Air National Guard Tech. Sgt. Alison Bruce-Maldonado VIRIN: 190718-Z-SB407-0011.JPG Photo Gallery