Blade inspection method
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Blade inspection method is a system to detect cracks in the main rotor blades. The method involved pressurizing the interior cavity of the rotor blades. If a crack is present, pressure is lost and a red indicator on the rotor blade root end was tripped.[1] Later, the BIM system was connected to a cockpit display. BIM allowed only flawed rotor blades to be swapped out. This method has been used on Sikorsky's S-61 series[1] and some later helicopter models.
References
- ↑ 1.0 1.1 "Sikorsky Helicopters", pp. 614–615. Flight International, October 10, 1963.
External links
- EASA Safety for Sikorsky S-61 Series helicopters Blade Inspection Method (BIM) system
- Sikorsky ABC flight trials
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