I was actually trying to record something else along the road but that was wiped out by the sound of a passing military humvee, probably from the local armory. So i've posted that instead. Iphone, audacity.
Small cinder-block building being torn down by john deere tractor. Bricks smash, wood splinters, treads clank, engine revs and idles, safety beeps are heard.
Recorded on marantz pmd661 with rode ntg-2. While working on a project i saw a man operating a machine with tank-treads designed for lifting wheelchairs up and down stairs. I took him aside and asked if i could record the internal motors and servos working.