GB1522506A - Landing warning system for a helicopter - Google Patents

Landing warning system for a helicopter

Info

Publication number
GB1522506A
GB1522506A GB44871/75A GB4487175A GB1522506A GB 1522506 A GB1522506 A GB 1522506A GB 44871/75 A GB44871/75 A GB 44871/75A GB 4487175 A GB4487175 A GB 4487175A GB 1522506 A GB1522506 A GB 1522506A
Authority
GB
United Kingdom
Prior art keywords
helicopter
altitude
signal
warning
pitch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB44871/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RTX Corp
Original Assignee
United Technologies Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/559,452 external-priority patent/US3979717A/en
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of GB1522506A publication Critical patent/GB1522506A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
    • G01C5/005—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels altimeters for aircraft

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Navigation (AREA)
  • Emergency Alarm Devices (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1522506 Helicopter warning system UNITED TECHNOLOGIES CORP 30 Oct 1975 [18 March 1975] 44871/75 Heading B7W A system for warning the pilot of a helicopter during landing that ground contact of the tail is imminent produces signals which are indicative of the helicopter's pitch angle and altitude, and sums these signals to provide a combined signal which is compared with a predetermined value indicative of ground contact. A visual and/or audio alarm signal is energized only when the voltages and phase of the altitude and pitch signals are equal and opposite. The summer 30 is biased by the output of a rate-ofdescent amplifier 26 so that the altitude signal is shifted upwardly as a function of the rate of descent of the helicopter. An altitude cut-off 28 is provided to prevent the actuation of the warning signal when the helicopter is above a predetermined altitude. An inhibit logic circuit (21) ensures that the warning signal is never actuated when the pitch is below a predetermined angle.
GB44871/75A 1975-03-18 1975-10-30 Landing warning system for a helicopter Expired GB1522506A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/559,452 US3979717A (en) 1974-06-03 1975-03-18 Helicopter warning system

Publications (1)

Publication Number Publication Date
GB1522506A true GB1522506A (en) 1978-08-23

Family

ID=24233647

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44871/75A Expired GB1522506A (en) 1975-03-18 1975-10-30 Landing warning system for a helicopter

Country Status (7)

Country Link
JP (1) JPS5725041B2 (en)
CA (1) CA1072195A (en)
DE (1) DE2549884A1 (en)
FR (1) FR2304515A1 (en)
GB (1) GB1522506A (en)
IL (1) IL48315A (en)
IT (1) IT1048840B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3228557A1 (en) * 1982-07-30 1984-02-09 Ulrich 8000 München Trampnau WARNING DEVICE FOR HELICOPTER
US4818992A (en) * 1983-06-10 1989-04-04 Sundstrand Data Control, Inc. Excessive altitude loss after take-off warning system for rotary wing aircraft
US4769645A (en) * 1983-06-10 1988-09-06 Sundstrand Data Control, Inc. Excessive pitch attitude warning system for rotary wing aircraft
CA1240771A (en) * 1983-06-10 1988-08-16 Noel S. Paterson Warning system for tactical rotary wing aircraft
DE3434758C2 (en) * 1984-09-21 1986-08-07 Ulrich 8000 München Trampnau Helicopter landing aid
DE19930559B4 (en) * 1999-07-02 2004-08-12 Airbus Deutschland Gmbh Arrangement and method for protecting an aircraft fuselage
DE102008058029B3 (en) 2008-11-18 2010-01-07 Deutsches Zentrum für Luft- und Raumfahrt e.V. helicopter
CN113335538A (en) * 2020-03-02 2021-09-03 中航西飞民用飞机有限责任公司 Aircraft test flight tail wiping monitoring method

Also Published As

Publication number Publication date
CA1072195A (en) 1980-02-19
FR2304515B1 (en) 1979-01-19
IL48315A (en) 1978-08-31
IT1048840B (en) 1980-12-20
FR2304515A1 (en) 1976-10-15
DE2549884A1 (en) 1976-09-30
IL48315A0 (en) 1975-12-31
JPS51109699A (en) 1976-09-28
JPS5725041B2 (en) 1982-05-27
AU8573375A (en) 1977-04-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee