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This is an optional Feathering shaft sleeve and 90° main rotor damper set for the Align 600 and 600N line of helicopters. The Feathering shaft sleeve fits over the feathering shaft to keep it centered in the main rotor housing and avoid excessive pressure on the Main rotor dampers during high collective maneuvers. The 90° dampers are harder and provide a firm but flexible support of the feathering shaft and main blades while allowing the rotor assembly to "flap" normally which reduces vibration in the rotor head assembly. Firmer dampers generally results in a more responsive feel to the helicopter while softer ones provide a more stable feel. These are the hardest dampers availible from Align and are best for advanced and 3D flyers. Package includes one Feathering shaft sleeve and four black 90° dampers. Note: The 90° dampers work well at higher headspeeds and may cause an oscillation or "wobble" of the Main rotor system when used at lower headspeeds.
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