New Zealand’s Tow and Blow Tow and Blow is a portable wind machine developed in New Zealand by engineer Kim McAulay. He used to import wind machines from the United States but designed his own portable machine to address some of the ­inefficiencies he experienced with the ­stationary versions. Wind machines had moved from having engines on top of the tower (accessed by a tall ladder) to being ground powered, but he found that having large diesel engines on the ground to power the fans used a lot of energy and the machines were expensive to maintain. He described it […]