Helicopter landing gear with crosstube pivot

Details Helicopter landing gear with crosstube pivot Helicopter landing gear with crosstube pivot

1979-01-29

1981-06-02

Frankfort, Charles E.

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

244100R, 244108, B64C 2552

Patent

active

042707110

ABSTRACT:
A helicopter landing gear assembly includes a pair of crosstubes (20, 22) having a pair of struts (28, 30) connected at the outboard ends thereof. A first of the crosstubes (22) is connected to the helicopter fuselage (16) at a pair of laterally spaced points (24, 26). The second of the crosstubes (20) is joined by a pivot connection (32) to a structural bridge (10) positioned above the second crosstube. The structural bridge (10) is connected at its outer ends to the fuselage main beams (12, 14). The structural bridge (10) connected to the second crosstube (20) permits the helicopter fuselage (16) to pivot about a fore-aft axis thereof to lower the natural roll frequency of the helicopter airframe and therefore increase the margin of stability to prevent ground resonance.

REFERENCES:
patent: 3193221 (1965-07-01), Victorian et al.
patent: 3506222 (1970-04-01), Anderson
patent: 3716208 (1973-02-01), Fagan et al.
patent: 3997133 (1976-12-01), Fagan
patent: 4142698 (1979-03-01), Niebanck et al.

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