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Maurice Ruyter's Action Helicopter

Maurice writes: "This is my version of the Action Helicopter. Approximately 24 inches in length, rotors turn about 120 revolutions per minute. Powered by the A49. Main rotor driven from the gear box using 2 P48, And the rear rotor powered off the rear of the A49 using a DP Motor Pulley to a P7A. Power is transferred between these two using a small O ring rubber washer (note: the O rings come in many sizes and work great for model building). Power is then transferred to the rear with a P57F 12 inch axle to a P13 to a P12 Crown Gear. This is a great action model that can run for hours, and is built with all pretty common parts."