The Desert Aircraft (DA) 50 motor is designed for lightweight radio controlled aeroplanes that weigh between 6.35 and 8.16kg. The engine itself only weighs 1.36kg. and is less than 7 inches long. Although the engine boasts a specially designed crankshaft, cylinder head and pistons, it, along with other RC engines, is plagued by engine vibrations. If not correctly reduced, these vibrations can cause damage to the fuselage, and may interfere with the handling of the aircraft.
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Change your motor mount. A standard mount simply holds the motor to the engine compartment. A special vibration-reducing mount purchased from your local hobby shop is specifically engineered for this purpose. These mounts have more nuts and bolts than the standard ones, and keep the engine from vibrating by creating a sturdy bond between it and the compartment.
Add styrofoam padding. Cut the padding and stuff it securely in between the motor and the walls of the engine compartment. This will absorb any vibrations and prevent them from resonating throughout the plane. Do not glue down the padding. You will need to remove it to do any maintenance on the engine.
Make sure that the propeller is properly balanced. A propeller with one side that is slightly off will create extra vibrations that travel back towards the motor. Turn the engine off and spin the propeller. If it wobbles slightly, it needs balancing. Watch it closely to determine which side is off, then place several small dots of glue on the lighter side to balance it out.
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