On arriving at Dan Marsh’s home in the King William Historic District of San Antonio, the first thing you notice is the oddly modified truck in the driveway. A custom wooden platform sits on the front of his 2013 Ford F-150, where Marsh can bolt various small wind turbines—miniature windmills that generate electricity—to take for a “spin” on the Interstate 35 and 410 frontage roads.With help from his wife and a teenage neighbor with a beginner’s interest in engineering, Marsh has performed several such test runs, logging the voltage generated by each turbine while highway-speed winds turn the blades. The 64-year-old retired HVAC professional and amateur inventor is out to prove he has solved a key problem in scaling down wind power generation to the…The post Has a San Antonio Inventor Solved a Problem of Small-scale Wind Power? appeared first on Texas Monthly.