A standard wheelbarrow is handy even to get wood IF you have a path. Otherwise you are continually bumping up against rock or bit of limb or whatever that stops standard wheelbarrow wheel cold. Wont even mention pushing loaded wheelbarrow uphill.... So been wondering about designing a motorized wood cart with one big wheel say like 15inch temp spare tire from car. The wheel would be in the middle with motor above it and racks in front and rear of the wheel/engine. Simple centrifugal clutch to engage/disengage power. Anybody built such a thing? Closest I've seen is a powered one wheel homemade cart some guy made to get deer carcass out of woods. I am sure he needed a buddy or two to keep it stablized as it was rather large flat platform and looked very tipsy. One big wheel should navigate smaller stuff on path without having to stop and move it. Raising center of gravity not good thing as it would make it more unstable, but necessary evil. The commercial made power wheelbarrows are just transaxle out of a garden tractor with dump box on top of it. Would be useless for what I want not to mention heavy and insanely overpriced for what they are.