US3782284A - Aircrew escape systems - Google Patents
Aircrew escape systems Download PDFInfo
- Publication number
- US3782284A US3782284A US00227433A US3782284DA US3782284A US 3782284 A US3782284 A US 3782284A US 00227433 A US00227433 A US 00227433A US 3782284D A US3782284D A US 3782284DA US 3782284 A US3782284 A US 3782284A
- Authority
- US
- United States
- Prior art keywords
- cord
- sheath
- flat
- blast
- lead
- 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 - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/32—Severable or jettisonable parts of fuselage facilitating emergency escape
Definitions
- ABSTRACT A detonating cord for causing fracture and break-up of an aircraft cockpit canopy for the purpose of emergency escape, consisting of an explosive core contained in a lead casing and surrounded by a plastic sheath, the cord being of substantially semicircular or D-shaped cross-section.
- the semi-circular surface, but not the flat face, of the casing has several layers of lead tape applied to it within the plastic sheath which lead tape acts asblast-containing and reflecting material to direct the blast effect of the detonation preferentially through the flat-face.
- an explosive cord device known as 'Miniature Detonating Cord or MDC, may be employed to cause fracture and break-up of the canopy transparency, or at least that area of it through which the aircrew member will pass.
- the detonating cord is given a cross-sectional form having at least one flat, and there is embodied within the cord construction at least one layer of blast-containing and reflecting material which extends all around the explosive core of the cord except where the flat lies, so that the blast effect from detonation is directed preferentially through the region of the cord periphery constituted by said flat.
- the cord is of semi-circular or D-section and the blast-containing and reflecting material is in the form of lead tape applied in layers to the curved portion of the outer surface of a lead casing containing the explosive core.
- the flat provides a convenient base surface by means of which the cord can be adhered to the canopy transparency and gives a directional effect to the blast because the air to transparency path is eliminated.
- the explosive filling 42 of the cord is contained within a formed lead casing 43 semi-circular in cross-section. This can be produce by flattening one side of the circular form resulting from a rolling operation. Attached only to the curved semicircular portion of the periphery of the lead casing are a number of lead tapes 44 adhesively secured one upon the other, and the whole assembly is contained within a heat-shrinkable plastic sheath 45 with adhesive 46 interposed between the sheath and the flat face of the lead case 43.
- the build-up of the adhesive tape provides a backing such that, although there will still be a tendency to radial blast losses, the presence of the lead tape, or any other suitable backing material capable of providing the desired blast retention and reflection, will ensure an increased concentration of the blast effect in the direction of the flat face, which is the face applied contiguously to the canopy surface.
- This form of MDC may be laid in a pattern on selected areas of canopy surface thus providing for a more predictable fracture. As it is not necessary to contain this present type of cord within a back-up extrusion such as is described in our aforementioned patent application, the vision loss through a canopy with a pattern-applied MDC will be minimal.
- a detonating cord for producing fracture and break-up of an aircraft cockpit canopy for the purpose of emergency escape comprising an explosive core and a completely enclosing sheath surrounding said core, said core and sheath jointly possessing a cross-sectional fonn having at least one flat, and wherein there is embodied in the cord within the sheath at least one layer of metallic blast-containing and reflecting material which extends all around the explosive core of the cord except where the flat lies, whereby the blast effect from detonation is directed preferentially through the region of the cord periphery constituted by said flat.
- cord according to claim 1 wherein the cord is of substantially semi-circular or D-cross-section.
- a cord according to claim 1, wherein the blastcontaining and reflecting material is, at least in part, in the form of lead tape applied in layers.
- a cord according to claim 1 having its flat face held in contiguity with a canopy surface, e.g. by adhe- SlVe.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Ropes Or Cables (AREA)
- Laminated Bodies (AREA)
- Toys (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB502171A GB1383512A (en) | 1971-02-19 | 1971-02-19 | Detonating cord for aircraft canpoy emergency break-up systems |
Publications (1)
Publication Number | Publication Date |
---|---|
US3782284A true US3782284A (en) | 1974-01-01 |
Family
ID=9788247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00227433A Expired - Lifetime US3782284A (en) | 1971-02-19 | 1972-02-18 | Aircrew escape systems |
Country Status (4)
Country | Link |
---|---|
US (1) | US3782284A (de) |
DE (1) | DE2207941C3 (de) |
FR (1) | FR2125588B1 (de) |
GB (1) | GB1383512A (de) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4239003A (en) * | 1978-08-14 | 1980-12-16 | The United States Of America As Represented By The Secretary Of The Navy | Method for transmitting detonation at a sharp angle |
US4301707A (en) * | 1979-10-29 | 1981-11-24 | Mcdonnell Douglas Corporation | Embedded explosive severance of non-metallic materials |
US4333381A (en) * | 1979-01-04 | 1982-06-08 | Societe Nationale Industrielle Aerospatiale | Plate-glass fitted with an explosion-cutting device |
US4753170A (en) * | 1983-06-23 | 1988-06-28 | Jet Research Center | Polygonal detonating cord and method of charge initiation |
US5217244A (en) * | 1989-07-14 | 1993-06-08 | Tip Engineering Group | Arrangement for forming an air bag deployment opening |
US20040055495A1 (en) * | 2002-04-23 | 2004-03-25 | Hannagan Harold W. | Tin alloy sheathed explosive device |
US20080017426A1 (en) * | 2006-03-23 | 2008-01-24 | Walters Raul J | Modular vehicle system and method |
US10739112B1 (en) * | 2013-08-15 | 2020-08-11 | The United States Of America As Represented By The Secretary Of The Navy | Impulse dampening system for emergency egress |
US10947169B2 (en) * | 2018-06-29 | 2021-03-16 | River Front Services, Inc. | Deployable explosive charge structure |
US11174982B2 (en) | 2016-11-08 | 2021-11-16 | River Front Services, Inc. | Deployable prop |
US11319260B2 (en) | 2019-11-05 | 2022-05-03 | Goodrich Corporation | Detonating cord stress concentrators |
US11454482B2 (en) | 2017-08-24 | 2022-09-27 | River Front Services, Inc. | Explosive detonating system and components |
US11543224B2 (en) | 2017-08-24 | 2023-01-03 | River Front Services, Inc. | Explosive detonating system and components |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2634171B1 (fr) * | 1988-07-13 | 1990-09-28 | Aerospatiale | Systeme pyrotechnique pour pratiquer une issue de secours dans une paroi d'un aeronef et aeronef equipe dudit systeme |
ES2193432T3 (es) | 1998-04-09 | 2003-11-01 | Certime Amsterdam B V | Panel colapsable y procedimiento de colapso controlado del mismo. |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB655921A (en) * | 1948-10-30 | 1951-08-08 | Edgar William John Phillips | Improvements in or relating to explosive line charges for fire-fighting and like purposes |
US3241489A (en) * | 1963-05-06 | 1966-03-22 | Ensign Bickford Co | Composite explosive signal transmission cord and method of making same |
US3336868A (en) * | 1965-04-02 | 1967-08-22 | Trw Inc | Separation device |
US3374737A (en) * | 1967-02-15 | 1968-03-26 | Earl A. Pike | Detonating tape |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3248072A (en) * | 1964-04-01 | 1966-04-26 | Mcdonnell Aircraft Corp | Underwater explosive effects attenuator |
GB1268947A (en) * | 1968-06-27 | 1972-03-29 | Explosive Tech | Improvements in or relating to the explosive forming of openings in wall-like structures |
-
1971
- 1971-02-19 GB GB502171A patent/GB1383512A/en not_active Expired
-
1972
- 1972-02-15 DE DE2207941A patent/DE2207941C3/de not_active Expired
- 1972-02-18 FR FR7205511A patent/FR2125588B1/fr not_active Expired
- 1972-02-18 US US00227433A patent/US3782284A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB655921A (en) * | 1948-10-30 | 1951-08-08 | Edgar William John Phillips | Improvements in or relating to explosive line charges for fire-fighting and like purposes |
US3241489A (en) * | 1963-05-06 | 1966-03-22 | Ensign Bickford Co | Composite explosive signal transmission cord and method of making same |
US3336868A (en) * | 1965-04-02 | 1967-08-22 | Trw Inc | Separation device |
US3374737A (en) * | 1967-02-15 | 1968-03-26 | Earl A. Pike | Detonating tape |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4239003A (en) * | 1978-08-14 | 1980-12-16 | The United States Of America As Represented By The Secretary Of The Navy | Method for transmitting detonation at a sharp angle |
US4333381A (en) * | 1979-01-04 | 1982-06-08 | Societe Nationale Industrielle Aerospatiale | Plate-glass fitted with an explosion-cutting device |
US4301707A (en) * | 1979-10-29 | 1981-11-24 | Mcdonnell Douglas Corporation | Embedded explosive severance of non-metallic materials |
US4753170A (en) * | 1983-06-23 | 1988-06-28 | Jet Research Center | Polygonal detonating cord and method of charge initiation |
US5217244A (en) * | 1989-07-14 | 1993-06-08 | Tip Engineering Group | Arrangement for forming an air bag deployment opening |
US20040055495A1 (en) * | 2002-04-23 | 2004-03-25 | Hannagan Harold W. | Tin alloy sheathed explosive device |
US20080017426A1 (en) * | 2006-03-23 | 2008-01-24 | Walters Raul J | Modular vehicle system and method |
WO2008060318A2 (en) * | 2006-03-23 | 2008-05-22 | Walters & Clune, Llc | Modular vehicle system and method |
WO2008060318A3 (en) * | 2006-03-23 | 2008-11-13 | Walters & Clune Llc | Modular vehicle system and method |
US10739112B1 (en) * | 2013-08-15 | 2020-08-11 | The United States Of America As Represented By The Secretary Of The Navy | Impulse dampening system for emergency egress |
US11174982B2 (en) | 2016-11-08 | 2021-11-16 | River Front Services, Inc. | Deployable prop |
US11454482B2 (en) | 2017-08-24 | 2022-09-27 | River Front Services, Inc. | Explosive detonating system and components |
US11543224B2 (en) | 2017-08-24 | 2023-01-03 | River Front Services, Inc. | Explosive detonating system and components |
US10947169B2 (en) * | 2018-06-29 | 2021-03-16 | River Front Services, Inc. | Deployable explosive charge structure |
US11319260B2 (en) | 2019-11-05 | 2022-05-03 | Goodrich Corporation | Detonating cord stress concentrators |
Also Published As
Publication number | Publication date |
---|---|
GB1383512A (en) | 1974-02-12 |
FR2125588B1 (de) | 1976-10-29 |
DE2207941B2 (de) | 1974-04-11 |
DE2207941A1 (de) | 1972-09-07 |
DE2207941C3 (de) | 1974-11-14 |
FR2125588A1 (de) | 1972-09-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BRITISH AEROSPACE PUBLIC LIMITED COMPANY, DISTRICT Free format text: CHANGE OF NAME;ASSIGNOR:BRITISH AEROSPACE LIMITED;REEL/FRAME:004080/0820 Effective date: 19820106 Owner name: BRITISH AEROSPACE PUBLIC LIMITED COMPANY Free format text: CHANGE OF NAME;ASSIGNOR:BRITISH AEROSPACE LIMITED;REEL/FRAME:004080/0820 Effective date: 19820106 |
|
AS | Assignment |
Owner name: BRITISH AEROSPACE, BROOKLANDS RD., WEYBRIDGE SURRE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. AS OF APR. 17,1978;ASSIGNOR:HAWKER SIDDELEY AVIATION LIMITED;REEL/FRAME:003953/0751 Effective date: 19811218 Owner name: BRITISH AEROSPACE, ENGLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAWKER SIDDELEY AVIATION LIMITED;REEL/FRAME:003953/0751 Effective date: 19811218 |