The Hirobo HI0412294 blade spacer is an RC accessory designed to manage the axial gap and lateral position of rotor blades on SDX FZ-V rotor assemblies. As a straightforward spacer element it helps retain consistent blade spacing and repeatable alignment through assembly and maintenance cycles.
Place this spacer where the existing blade stack or hub requires an intermediate shim to remedy stack height or remove side play. Its passive mechanical role contributes to stable blade geometry, which can influence trim and the overall rotor balance in scale electric or nitro models.
Fitting normally involves disassembling the blade hub to reach the blade stack, inserting the spacer at the required point, and then checking blade track and pitch symmetry after reassembly. Confirm correct seating and clearance with the rotor stationary and during a low-speed spin before returning to normal operation.
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