The goal of the project is to use the analytical heat transfer process to determine outlet coolant and air temperatures and to compare this data with experimental results. To begin the theoretical process, it is important to distinguish the given, known information from the unknown information. All dimensions for both the fan and radiator are known from precise measurements. The mass flow rates of both the air and water are known based on the given specifications of the fan and radiator. The inlet temperature for air can be assumed to be nearly equal to the ambient temperature. The inlet temperature of water is equal to the temperature of the engine. The entire theoretical process begins with Equation 1 below for the heat transfer rate of the radiator. From this equation, it is clear that the only two unknowns for the system are the outlet temperatures for air and water. These two unknowns are initially assumed. The equations and calculations following are simply used to solve for both outlet temperatures. The initially assumed outlet temperatures and calculated outlet temperatures are then iterated to solve for the actual values for the outlet temperatures for air and water.