When Helicopter Vibration Becomes Dangerous and What You Can Do About It

helicopter rotor track and balanceHelicopter vibration can be a serious safety concern and cause mechanical issues. Vibration in aircraft occurs when spinning objects become unbalanced, meaning one side is heavier than the other. The extra weight on one side throws off the center balance, making the rotation lopsided. The lopsided weight travels around in a circle when the propellers spin, causes a wobble in the rotation.

Engine and propeller manufacturers each have their own unique way of completing a vibration analysis for different applications. There is, however, a general graph you can use. Aircraft vibration severity is typically measured on a scale from 0 to 1.2 inches per second (IPS). According to the scale, 0-.2 IPS is rated as “good,” .21-.4 IPS is “fair,” .41-.6 IPS is “slightly rough,” .61 -.8 IPS is “rough,” .81-1.0 IPS is “very rough,” and 1.01-1.2 IPS is “dangerous.”

Some of the issues caused by dangerous levels of vibration include:

    • Affects the flight crew
    • Makes the aircraft unsafe
    • shortens the service life of the rotor and other parts of the assembly
    • Can crack the exhaust stacks and sheet metal
    • Creates a higher than normal occurrence of oil leaks and light bulb failures
    • Induces physical movement of the airframe (buzz in the seat, yoke, and rudder pedals)
    • Passengers complain of the noise in the cabin
    • Cause machines to break
    • People who are using the machines become fatigued
    • Reduces personal comfort

Rotor Track and Balance to Reduce Helicopter Vibration

Helicopter rotor track and balance is incredibly important for an aircraft that experiences vibration. The rotor blades travel at incredibly fast speeds around a fixed point, and they are susceptible to damage and wear during flight as they pitch at varying angles to direct the aircraft and provide lift. The wear and tear they experience can cause the rotor to become unbalanced. Rotor Blade Track and Balancing helps reduce vibration caused by rotational movement. It also can ensure that a vital component operates at the correct level and under optimal conditions.

If you notice that your aircraft is vibrating more than it should be, then it’s probably time to invest in vibration balancing equipment. Contact us today for more information.

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