Fluid reaction surfaces (i.e. – impellers) – Radially extensible or retractible rotor working member – Variable work surface or non-rigid connection
Patent
1993-03-26
1994-05-10
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Radially extensible or retractible rotor working member
Variable work surface or non-rigid connection
416 87, B64C 2746
Patent
active
053103149
ABSTRACT:
A tip brake unit for installation in tip portions of rotor blades of rotary wing aircraft having a plurality of load-carrying rotors has a frame of a size and shape for installation in a tip portion of a rotor blade. An elongate tip brake member of channel cross sectional shape with a closed outer end is supported and guided by rollers on the frame for movement longitudinally between an inner position in which a closed outer end of the tip brake member is flush with the tip of the rotor blade and an outer position in which the tip brake member projects beyond the tip of the blade. The open side of the channel shaped tip brake member faces forwardly with respect to the direction of movement of the tip portion of the rotor blade in which the tip brake unit is installed. The tip brake member is moved between inner and outer positions by a first pinion engaging a first rack on the tip brake member, an operating member having a second rack engaging a smaller second pinion coaxially rotatable with the first pinion, a first bell crank having a longer arm connecting with the operating member and a shorter arm connected with a longer arm of a second bell crank having a shorter arm connected through a lost motion device with a tip brake operating system of the aircraft.
REFERENCES:
patent: 2835331 (1958-05-01), Ryan et al.
patent: 3814351 (1974-06-01), Bielawa
patent: 4710101 (1987-12-01), Jamieson
patent: 5096378 (1992-03-01), Jamieson
Bastedo Walter
Pappas Alex
Stevens Martin L.
Burns Robert E.
Gyrodyne Company of America, Inc.
Larson James A.
Lobato Emmanuel J.
Look Edward K.
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