| 摘要 |
PURPOSE:To enable prevention of reduction of an amount of air incoming by bringing a negative pressure into an ineffective state by means of turbulence produced therearound, by a method wherein the air intake port of an air cleaner is turned to the downstream side of the air flow of an aerial propeller, and a spoiler extended sideways is mounted therearound. CONSTITUTION:Although the front flow of an aerial propeller flows in a laminar manner as shown by an arrow mark A, when it passes an air intake port 12a of an air cleaner, the laminar flow is disturbed by a spoiler 14, and turbulence B shown by an arrow mark B is produced. THe turbulence B flows in the shape of a cylinder surrounding the periphery of the air intake port 12a, and thereby the inner side of the turbulence B is brought into a state in that the negative pressure of the front flow of the aerial propeller is rendered ineffective. This causes suction of an enough amount of air, shown by an arrow mark C, through the air intake port 12a, and prevents the occurrence of deficiency in intake air, resulting in prevention of a decrease in the output of an engine 3. |
