The DC motor was the mainstay of electric traction drives on both electric and diesel-electric locomotives, street-cars/trams and diesel electric drilling rigs for many years. The introduction of DC motors and an electrical grid system to run machinery starting in the 1870s started a new second Industrial Revolution.
One acre is 43,560 sq ft. One half acre is 21,780 sq ft. However, that doesn't help most people much when trying to picture how large a lot is. Half acre lot is roughly:
Best Answer: each acre will measure 208.71 feet by 208.71 feet. or 43560.17 square feet exactly. most will say 43560 square feet. or 4840 square yards. that is how big one acre is = double all that for two acres.... Good luck....