Matthew Dean Ledbetter

US Patent:

20210055717, Feb 25, 2021

Filed:

Aug 21, 2019

Appl. No.:

16/547182

Inventors:

- Fort Worth TX, US
Matthew Curtis LEDBETTER - North Richland Hills TX, US

Assignee:

Bell Textron Inc. - Fort Worth TX

International Classification:

G05B 23/02
B64D 45/00
B64F 5/60
G07C 5/00
G07C 5/08

Abstract:

A method includes acquiring a current condition indicator of a condition indicator set associated with an operating condition of a vehicle, the condition indicator set indicating sensor readings associated with an operating element of the vehicle under the operating condition, determining, by a data server, a volatility over a window of the condition indicator set based, at least in part, on differences between adjacent data points in the window, wherein the window includes the current condition indicator, determining, by the data server, a movement over the window of the condition indicator set based, at least in part, on a difference between two selected data points in the window, determining a volatility-based movement significance over the window of the condition indicator set based, at least in part, on a ratio of the movement to the volatility, determining, by the data server, whether a trend associated with the operating element is indicated based, at least in part, on the volatility-based movement significance, and generating, by the data server, an alert signal in response to the determining that the trend is indicated.

US Patent:

20200001991, Jan 2, 2020

Filed:

Jun 28, 2018

Appl. No.:

16/022375

Inventors:

- Fort Worth TX, US
Matthew Curtis Ledbetter - North Richland Hills TX, US

International Classification:

B64C 27/32

Abstract:

A rotorcraft having a rotor system including a yoke, a plurality of grip assemblies, each of which is hingedly attach a rotor blade to the yoke, a plurality of flap stops, each flap stop attached to a respective grip assembly, a channel bounded by an upper and lower retaining surfaces, and a droop ring slideably disposed in the channel of the droop limiting system. The droop ring has a body with an inner surface, an outer surface, and a first end surface between the inner surface and the outer surface. The droop ring further has a first wear element removably disposed at the first end surface and extending above the first end surface and spaces the first end surface apart from the channel. Each flap stop is arranged to contact the outer surface of the droop ring and limit a downward droop of the respective rotor blade.