Evolution 7 cylinder 35cc 4 stroke radial engine

(This text is machine translated) Evolution Engines 7 Cylinder 35cc 4-Stroke Radial Engine Star architecture, in general, has been used extensively in aviation. The number of cylinders is necessarily odd for reasons of balancing and cyclic regularity, ie 3, 5, 7, 9 for a single star engine. A star engine, or more exactly with star cylinders, is a type of piston engine whose cylinders are placed on the same plane around the crankshaft and engine output shaft. Two of the main advantages of these engines are that they are easier to cool by air, especially since they are mounted on aircraft. A star engine is also more compact, lighter than other architectures. When the engine is stopped, the residual oil flows into the lower cylinders, then into the combustion chambers, which explains the strong emission of smoke when these engines are started and the need to “stir” them (turn the propeller manually to evacuate the oil from the chambers) before launching them after a prolonged stop. The choice of a star engine...