Patent EP0224278A2 successfully refreshed from Google Patents.
EP0224278A2
Expired / Lapsed
EP
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Apparatus for generating an aircraft situation display
Assignee: Boeing Co
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Filing: 1986-07-29
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Granted: —
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Expires: 2006-07-29
Abstract
Abstract A pitch limit symbol is generated at an aircraft attitude indicator which provides a pilot with display of a stall warning angle of attack margin which is referenced to an airplane symbol on the primary attitude indicator. The position of the pitch limit symbol relative to the aircraft symbol is a function of the difference in angle of attack between the current angle of attack at the aircraft, and a predetermined angle of attack at which the onset of stall warning occurs. Additional information is provided on the attitude indicator by a flight path angle symbol. The pitch limit symbol together with the flight path angle symbol provides the pilot with information to achieve a positive rate of climb during a pitch up maneuver while adjusting the pitch attitude of the aircraft to avoid a stall situation. The position of the pitch limit symbol may be compensated by various means to decrease the distance between the aircraft symbol and the pitch limit symbol.
Inventors
- 👤 Brian Douglas Kelly
- 👤 James Edwin Veitengruber
- 👤 Alan Roger Mulally
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 16:00
CPC Classifications
G; G01; G01C; G01C23/00; G01C23/005; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
98 words
I. An informational display apparatus for displaying an aircraft flight limit relative to an aircraft flight attitude, comprising: a. informational display means for displaying i) a first symbol at a first location in a manner to indicate a current aircraft flight attitude, and ii) a second symbol positioned relative to said first symbol at varying predetermined locations to indicate an aircraft flight limit; and b. control means for moving said second symbol relative to said first symbol in a manner that a distance between said first symbol and said second symbol corresponds to an aircraft flight limit margin.
Claim 2
Dependent Claim
23 words
The informational display apparatus as set forth in claim I wherein said aircraft flight limit is a warning indication of a stall condition.
Claim 3
Dependent Claim
40 words
The informational display apparatus as set forth in claim 2 wherein said aircraft flight limit margin is a function of a difference between said current angle of attack and said angle of attack at which said stall warning indication occurs.
Claim 4
Dependent Claim
54 words
The informational display apparatus as set forth in claim 2 wherein said control means operates in a manner that an actual margin between said current angle of attack and said warning indication of angle of attack is greater than a displayed margin corresponding to said distance between the first symbol and the second symbol.
Claim 5
Dependent Claim
62 words
The informational display apparatus as set forth in claim 2 wherein said control means operates in a manner that in the event a first location of said first symbol and said second location of said second symbol generally coincide, a computed margin remains between said aircraft current angle of attack and said angle of attack at which said stall warning indication occurs.
Claim 6
Dependent Claim
40 words
The informational display apparatus as set forth in claim 4 wherein said actual margin is greater than said displayed margin when an airspeed rate of said aircraft is negative and a pitch attitude of said. aircraft exceeds a predetermined attitude.
Claim 7
Dependent Claim
57 words
The informational apparatus as set forth in claim 6 wherein a difference between said actual margin and said displayed margin is defined by a term k(e -x) * V̇ ac , where k = constant, 0 = said aircraft current pitch attitude, x = said predetermined pitch attitude, and V ae = said aircraft current airspeed rate.
Claim 8
Dependent Claim
49 words
The informational display apparatus as set forth in claim 6 wherein a difference between said actual margin and said displayed margin is defined by a term k ( a -x), where k = constant, 0 = said aircraft current pitch attitude, and x = said pre- determined pitch attitude.
Claim 9
Dependent Claim
48 words
The informational display apparatus as set forth in claim 6 wherein a difference between said actual margin and said displayed margin is defined by a term k (8 -x)' where k = constant, 0 = said aircraft current pitch attitude, and x = said pre- determined pitch attitude.
Claim 10
Dependent Claim
35 words
The informational display apparatus as set forth in claim 2 wherein said informational display means includes means for displaying a horizon reference relative to said first symbol to indicate said current attitude of said aircraft.
Claim 11
Dependent Claim
28 words
II. The informational display apparatus as set forth in claim 10 wherein a distance between said horizon reference and said second symbol does not exceed a predetermined amount.
Claim 12
Dependent Claim
38 words
The informational display apparatus as set forth in claim 2 wherein said second symbol has a shape similar to a shape of said first symbol to establish a visual relationship between said first symbol and said second symbol.
Claim 13
Dependent Claim
49 words
. 13. The informational display apparatus as set forth in claim 12 wherein said second symbol has a shape which provides a visual indication that said flight limit corresponds to a first location on the first symbol and that locations above the first location are beyond said flight limit.
Claim 14
Dependent Claim
31 words
The informational display apparatus as set forth in claim 2 additionally comprising means for displaying a third symbol relative to said horizon reference to represent an aircraft climb and descent condition.
References Cited (Backward Citations)
No citation records indexed.
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