Sir Isaac Newton over 300 years ago discovered the physical principals which explained the motion of aircrafts. In 1686, he proposed the three laws of motion in his book "Principia Mathematica Philosophiae Naturalis". Newton's first law of motion states that any object will remain at rest or in uniform motion unless its state is changed by an external force.
This blog is all about snowmobiles from the 1960's thru the 1980's. The daily posts will feature stories, ads or press releases for a classic snowmobile during that period from various snowmobile magazines and other publications during that period in snowmobile history