In these, valves are on the side of the combustion chamber, in the engine block, and fuel and air enter from the side and exhaust exits out the same side. A cross section of this type of combustion chamber looks like an upside down letter L. So, flatheads are sometimes known as L-head engines.
They are American iconsâthey're on our dollars and coins, they are the subject of our monuments, and we live our daily lives in the world their ideas helped create. America's Founding Fathers include George Washington, John Adams, Thomas Jefferson, James Madison, Alexander Hamilton, James Monroe and, of course, Benjamin Franklin.
In this essay I will refer to the main founding fathers of sociology: Comte, Durkheim, Marx and Weber. I will discuss their main ideas and concerns about the changing societies that they encountered. The Frenchman Auguste Comte (1798-1857) grew up in the wake of the French revolution of 1789.