Yup. It’s Thursday. It’s a Museum of Flight sketch. I stuck around after my shift in order to sketch this.
The Seattle Museum of Flight now owns and has newly on display a Boeing Fuel Cell Demonstrator aircraft. It is a modified HK36 Super Dimona. The info card says: “In 2008, Boeing successfully demonstrated the first straight-level manned flight that was powered solely by a hydrogen fuel cell system. This two seat Super Dimona motor glider was modified to include a proton exchange membrane (PEM) fuel cell lithium-ion battery system. During takeoff and climb, the aircraft drew from the combined power of the lithium-ion batteries and the fuel cell. The fuel cell then provided all power for the cruise phase of flight at 60 mph (96.56 km/h) for 20 minutes.”