A favorite satellite photo of an experimental wind turbine project in Iowa. What luck to have a straight down photo at the exact moment the sun angle was just right to give an un-distorted shadow (yes that is the shadow!) of the slow speed wind turbine. The 50 kW grid-connected DC generator appears as a small dot on the right side where the mast shadow meets the wheel shadow. The actual turbine is the silver shape in the corner of the green grass. This was a very interesting renewable energy project. The experimental generator in Iowa was programmed and monitored, via internet, from Maine. Thanks, NASA! – cnt, from the Raven period…
Dirigo formed in 1990 specializing in analog electronic circuits. Problem solving led to the invention and commercialized of a patented trawl cable vibration meter that showed fishing vessels how their nets were fishing on the ocean bottom. Serendipity connected that effort with a project for the US Army investigating fuel saving generators that could operate at varying speed. That led to a project for the BMDO (now Missile Defense Agency) inventing new variable speed technology for vehicle mounted AC generators. In 1999 Dirigo joined with Wood Engineering to patent and commercialize the technology as Raven Technology LLC, which sold variable speed generators for emergency vehicles and renewable energy systems from 2004-2017. Raven has now finished up operations and Dirigo R&D is at work specializing in instrumentation, electrical machine design, renewable energy, analog and digital electronics and microprocessor controls.
Dirigo – From Latin, “I lead” – Maine State Motto
R&D – From Yankee, “persistence”