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.
Within the large group known as the Founding Fathers, there are two key subsets, the Signers (who signed the Declaration of Independence in 1776) and the Framers (who were delegates to the Federal Convention and took part in framing or drafting the proposed Constitution of the United States).