Heli-Expo 2014: Northrop LCR-100 AHRS for Bell 412
An agreement announced at Heli-Expo 2014 will see the Bell 412 helicopter carry the Northrop Grumman LCR-100 Attitude Heading Reference System (AHRS) until at least 2017.
The LCR-100 AHRS, produced by Northrop Grumman LITEF, has been in service on numerous rotorcraft and fixed-wing platforms since its inception in 2008, providing aircraft with critical flight control and navigation data.
The system is capable of self-aligning (gyro compassing) and does not require magnetic sensors for heading alignment. Its modularity also allows the integration of external or embedded GPS. When GPS is provided, the ‘hybrid’ output supplies a blended position solution meeting IRS navigation standards.
Eckehardt Keip, managing director, Northrop Grumman LITEF, said: ‘Since the late 1990s, our involvement with Bell Helicopter on the B412 has been one of the cornerstones of our success. This extension of our long-term agreement strengthens Northrop Grumman's commitment to Bell Helicopter and we look forward to continuing our support of this proven platform.’
The LCR-100 employs a fibre-optic gyro-based inertial measurement unit and an advanced micro-electromechanical system triad accelerometer. The unit has a high-performance directional gyro mode, which minimises compass errors, and exceeds the Technical Standard Order/ European Technical Standard Order (TSO/ETSO) C5e/f non-magnetic, gyro-stabilised drift requirement, enabling improved operation at extreme latitudes.
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