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.
Historian Richard B. Morris in 1973 identified the following seven figures as the key Founding Fathers: John Adams, Benjamin Franklin, Alexander Hamilton, John Jay, Thomas Jefferson, James Madison, and George Washington. Adams, Jefferson, and Franklin worked on the committee to draft the Declaration of Independence. Hamilton, Madison, and Jay were authors of the The Federalist Papers, advocating ratification of the Constitution. Washington commanded the revolutionary army.