B - Operations – Transporting – 64 – C
Patent
B - Operations, Transporting
64
C
B64C 27/00 (2006.01) B64C 27/12 (2006.01)
Patent
CA 2060122
A support truss for the main rotor assembly of a helicopter is configured to structurally support the main rotor assembly in integrated combination with the helicopter airframe and to transmit dynamic and static longitudinal, lateral, vertical, and torsional loads of the main rotor assembly into the helicopter airframe at two distinct, spaced-apart load transfer levels. The support truss is an integrally formed structure that includes a generally cylindrical body member configured to provide attachment points for the static rotor mast and the transmission of the main rotor assembly, a pair of forward facing primary support ribs configured to secure the support truss to a primary load transfer level of the helicopter airframe and to transmit dynamic and static longitudinal, lateral, vertical, and all torsional loads to the primary load transfer level, and a pair of aft facing support struts configured to secure the support truss to a secondary load transfer level and to transmit only axial loads to the secondary transfer level. The support truss also includes a forward facing secondary support rib that provides fail-safe redundancy in the event of a loss of one of the primary support ribs. The support truss may also include a cross stringer extending between and integrally interconnecting the primary and secondary support ribs. A plurality of servo lugs may be integrally formed with the body member to provide lower attachment points for rotor servo actuators of the main rotor assembly.
Grant Peter Leigh
Toni Darryl Mark
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
United Technologies Corporation
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