For the past 10 years a movement has sprouted amongst off-road enthusiasts building extremely purpose-built 4x4s. Rock buggies, tube cars, trail rails-whatever you want to call them. This trend uses ...

Question: What does a Cal Poly-educated design engineer do in his free time? Answer: If his name is Jeff Friesen, he designs and builds this incredible hydrostatic-powered machine, which he calls the ...