The Primary Engine Arrangement represents the main functional grouping of engine components that interact to support power generation and internal operating behavior. This arrangement defines how air intake flow, fuel delivery flow, combustion activity, exhaust routing, lubrication circulation, and cooling flow interact through connected paths. Rotational movement is transferred between linked components while fluid paths guide air, fuel, oil, and coolant through defined routes that support controlled operation. Control inputs interact with mechanical and fluid functions to regulate output response during changing operating conditions.Attributes:• Allows interaction between control inputs and output behavior.• Maintains continuity of air, fuel, oil, and coolant flow paths.• Allows sequencing of operating functions during start sequences.Applications: The Primary Engine Arrangement is used to coordinate core engine components so that power generation, fluid routing, movement transfer, and operating response occur in a unified and controlled manner.