Short take off jump mode for airplane landing gear struts

Details Short take off jump mode for airplane landing gear struts Short take off jump mode for airplane landing gear struts

1982-09-30

1985-06-25

Blix, Trygve M.

Aeronautics and astronautics

Aircraft propulsion

Launching

244102SL, 244102SS, 244104FP, B64C 2526, B64C 2560

Patent

active

045249296

ABSTRACT:
A telescoping energy-dissipating oleo landing gear shock strut set which can provide both the main landing gear and forward landing gear function, and which is affixed to an airplane, is restrained in an unenergized, shortened condition. A high pressure gas charge is then provided between the extendible element of the strut and the element affixed to the airplane. Early in the takeoff run, the charge gas in the forward strut is released so as to jump the nose and rotate the airplane to a high angle of attack appropriate for takeoff. Subsequent to this rotation, but before the conventional takeoff speed is reached, the charge gas in each of the main struts is released to impart a vertical velocity to the entire airplane, thus jumping it into the air. Both the forward strut and main struts incorporate a hydraulic flow bypass function, so that the landing shock dissipation function does not compromise the aforesaid energy release. The struts also incorporate valves to discharge enough residual gas immediately at the end of the jump stroke so that the landing energy dissipation mode is not compromised.

REFERENCES:
patent: 1068165 (1913-07-01), Peterson
patent: 1745081 (1930-01-01), Crumbaugh
patent: 1767120 (1930-06-01), Canfield
patent: 2735634 (1956-02-01), Fosness
patent: 3023740 (1962-03-01), Samuel, Jr. et al.
patent: 4291850 (1981-09-01), Sharples
patent: 4300664 (1981-11-01), Helm et al.

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