The Boeing Company

Farid Piroozmandi

Kelly L Boren

Sergey D Barmichev

Geoffrey E Gouette

Mohammad Barakatain

Steven L Wehr

Paul A VanGinhoven

Ralph E Fossen

Brian L Collen

Steven B White

Sudershan K Taneja

James M Merrick

Pete Brownlow

Kristine K Weed

Described are systems and methods for a nacelle auxiliary landing gear to be utilized as an alternative landing gear in the event of main landing gear non-deployment. The systems described herein include a nacelle auxiliary landing gear that includes a nacelle auxiliary landing gear strut and a nacelle auxiliary landing gear wheel, coupled to the nacelle auxiliary landing gear strut, wherein at least a first portion of the nacelle auxiliary landing gear wheel is configured to be disposed outside of a nacelle of an aircraft propulsor. The nacelle auxiliary landing gear strut is coupled to a core engine. Techniques for use of the nacelle auxiliary landing gear are also described herein.

Nacelle auxiliary landing gear

There is provided an aircraft tipping alarm system having a nose landing gear (NLG) shock strut containing hydraulic fluid and having an aperture. The system further has an elongated pressure chamber assembly configured to engage to the aperture. The elongated pressure chamber assembly has an elongated pressure chamber containing hydraulic fluid and having a pressure sensor device, a first check valve configured to restrict hydraulic fluid flow only into the NLG shock strut, a second check valve configured to restrict hydraulic fluid flow only into the elongated pressure chamber, and a reduced diameter breakable neck section. A potential aircraft tipping back position is indicated when a reduction of pressure of the hydraulic fluid in the NLG shock strut, sensed via the pressure sensor device, is greater than or equal to a pressure reduction threshold.

Aircraft tipping alarm system and method using fluid pressure measurement on nose landing gear shock strut

A method of increasing the friction between a tire of a vehicle and an icy surface includes dispensing a cooling agent such that at least a portion of the dispensed cooling agent is distributed between the tire of the vehicle and the icy surface.

Anti-skid systems for vehicle tires on icy road conditions and method therefor

A tip alarm system for an aircraft having a nose landing gear (NLG) includes a sensor having first and second parts respectively disposed on first and second portions of the NLG that are respectively fixed to the aircraft and moveable relative to the fixed portion and operable to detect the position of the first and second portions relative to each other and to produce a tip alarm signal when the first and second NLG portions are disposed at a selected position relative to each other corresponding to an imminent aircraft tipping condition and thereby prevent the aircraft from tipping back onto the ground due to improper loading of the aircraft.

Aircraft tip alarm system

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Kirkland, WA, United States of America

Farid Piroozmandi