US20060169841A1 - Guided missile having a jettisoned protective cap - Google Patents
Guided missile having a jettisoned protective cap Download PDFInfo
- Publication number
- US20060169841A1 US20060169841A1 US10/634,485 US63448503A US2006169841A1 US 20060169841 A1 US20060169841 A1 US 20060169841A1 US 63448503 A US63448503 A US 63448503A US 2006169841 A1 US2006169841 A1 US 2006169841A1
- Authority
- US
- United States
- Prior art keywords
- protective cap
- airframe
- guided missile
- parts
- releasing
- 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.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
- F42B10/38—Range-increasing arrangements
- F42B10/42—Streamlined projectiles
- F42B10/46—Streamlined nose cones; Windshields; Radomes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
- F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means
Definitions
- the invention relates to a guided missile having at its tip a seeker head which is covered by a protective cap releasable during the flight.
- Guided missiles are provided with a seeker head at their tip responsive to the radiation of a tracked target.
- the seeker head usually has an imaging optical system imaging an object scene comprising the target onto a detector or a reticle. From the signals at the detector control signals are derived guiding the missile to the target.
- Towards the front the seeker head is covered by a curved window, the dome.
- the dome consists of a material which is transparent for the radiation to which the detector is responsive.
- Missiles are accelerated to very high velocities.
- the dome is therefore exposed to considerable mechanical and thermical stress limiting the life time of the dome and thereby of the seeker head during the flight. Therefore it is known to cover the dome at first with a protective cap.
- the missile is first guided close to the target by other guidance means.
- the protective cap is pyrotechnically released freeing the dome and the seeker head and the seeker head can detect the target and guide the missile to the target. It is essential that the missile is not damaged by the releasing of the protective cap or disturbed in its path.
- this object is achieved in that the protective cap is divided along its length in at least two parts kept together by releasable connecting means and the protective cap is form-fitting connected to the airframe only in the connected state by interlocking structures of the releasing cap and the airframe of the missile.
- the protective cap In a first flight phase with put-on protective cap kept together by connecting means the protective cap is form-fitted held to the airframe of the missile. This is achieved without screws or the like by interlocking structures provided at the protective cap and the airframe of the missile. These structures can be for example an inwardly projecting ledge at the airframe-side edge of the protective cap interlocking with a circumferential recess in the airframe. As long as the protective cap is held together, form-fitting connection is ensured over 360°. When the connecting means are released the longitudinally divided protective cap falls apart into several segments each extending over for example 180° or 120°. Thereby the form-fitting is no longer ensured. The pressure pushes the segments in a radial direction outwards, while the interlocking structures fall apart. The segments are jettisoned to the side.
- FIG. 1 is a perspective, partly sectional view of the tip of a missile with a two-part conical protective cap wherein an opening is provided in the tip of the protective cap to build up pressure within the protective cap.
- FIG. 2 is a perspective view of the arrangement of FIG. 1 and shows the release of the connecting means and the opening of the protective cap.
- FIG. 3 is a perspective view similar to the one in FIG. 2 and shows the sideways jettisoning of the two parts of the protective cap.
- FIG. 4 is a perspective view of an alternative embodiment of a protective cap also having an opening for generating a pressure, this opening, however, being closed by a releasable cover in the form of the tip of a cone.
- FIG. 5 is a perspective view similar to the one in FIG. 4 and illustrates the release of the tip of the cone.
- FIG. 6 is a perspective view of the protective cap of FIG. 5 and shows the dividing of the two parts of the protective cap.
- numeral 10 denotes the tip of a missile.
- the tip 10 comprises a (non-visible) seeker head, for example an infrared seeker head.
- the tip 10 is closed by a dome 12 , i.e a curved window transparent for infrared radiation.
- a conical protective cap 14 is arranged in front of the dome 12 at the tip 10 .
- the protective cap 14 is longitudinally divided along along two diametrally opposing generatrices 16 and 18 of the cone, so that two parts 20 and 22 are formed each extending over 180°.
- the two parts 20 and 22 are connected by connecting means 24 which are pyrotechnically releasable. By the pyrotechnical release of the connecting means 24 the two parts 20 and 22 can be separated from each other.
- the connecting means 24 are divided into two halves 24 A and 24 B.
- the protective cap 14 is not divided it is form-fitted connected to the protective cap and the airframe or tip 10 of the missile by the interlocking structures.
- these structures consist of an inwardly projecting ledge 26 extending along the airframe-side edge of the protective cap 14 which interlocks with a circumferential recess at the edge of the tip 10 about an angle of 360°. If the protective cap 14 falls apart into two parts 20 and 22 , with each of them extending only about an angle of 180° there is no form-fitting any longer. The two parts 20 and 22 are disengage from the tip 10 of the missile and are jettisoned to the side, as shown in FIG. 3 .
- an opening 28 is provided in the range of the tip of the cone. Through this opening a pressure builds up in the space within the protective cap 14 and in front of the dome 12 . This pressure acts on the two parts 20 and 22 outwardly to the side. When the connecting means 24 are separated and the protective cap 14 is divided into its two parts 20 and 22 this pressure ensures that the parts 20 and 22 are quickly pushed away to the side.
- FIGS. 4 to 6 show a different embodiment.
- the cone-shaped protective cap 30 consists of three parts, i.e. two at the tip 32 of the missile and adjacent bowl-shaped parts 34 and 36 adding up to a section of the protective cap 30 in the shape of a truncated cone and forming an opening 38 at the front and a cone-shaped cover 40 forming the tip of the cone of the protective cap 30 and covering the opening 38 and keeping the two parts 34 and 36 together at their front edge.
- the cover 40 is pyrotechnically blown off to jettison the protective cap 30 .
- the opening 38 is freed.
- a pressure builds up within the parts 34 and 36 trying to push the two parts apart.
- the parts 34 and 36 released by the cover 40 are pushed apart.
- the form-fitting at the rear end of the parts 34 and 36 ends so that the parts 34 and 36 are released backwards at an inclined angle.
Abstract
A guided missile having a longitudinally extending airframe with a tip, a seeker head arranged in the tip and a window located in front of the seeker head for closing the airframe at the tip so as to protect the seeker head. A jettisonable protective cap consisting of at least two separable parts is attached to the airframe in front of the window for protection of the window.
Description
- The invention relates to a guided missile having at its tip a seeker head which is covered by a protective cap releasable during the flight.
- Guided missiles are provided with a seeker head at their tip responsive to the radiation of a tracked target. The seeker head usually has an imaging optical system imaging an object scene comprising the target onto a detector or a reticle. From the signals at the detector control signals are derived guiding the missile to the target. Towards the front the seeker head is covered by a curved window, the dome. The dome consists of a material which is transparent for the radiation to which the detector is responsive.
- Missiles are accelerated to very high velocities. The dome is therefore exposed to considerable mechanical and thermical stress limiting the life time of the dome and thereby of the seeker head during the flight. Therefore it is known to cover the dome at first with a protective cap. The missile is first guided close to the target by other guidance means. Then the protective cap is pyrotechnically released freeing the dome and the seeker head and the seeker head can detect the target and guide the missile to the target. It is essential that the missile is not damaged by the releasing of the protective cap or disturbed in its path.
- It is an object of the invention to provide a releaseable protective cap which can be released without impairing the missile.
- According to the invention this object is achieved in that the protective cap is divided along its length in at least two parts kept together by releasable connecting means and the protective cap is form-fitting connected to the airframe only in the connected state by interlocking structures of the releasing cap and the airframe of the missile.
- In a first flight phase with put-on protective cap kept together by connecting means the protective cap is form-fitted held to the airframe of the missile. This is achieved without screws or the like by interlocking structures provided at the protective cap and the airframe of the missile. These structures can be for example an inwardly projecting ledge at the airframe-side edge of the protective cap interlocking with a circumferential recess in the airframe. As long as the protective cap is held together, form-fitting connection is ensured over 360°. When the connecting means are released the longitudinally divided protective cap falls apart into several segments each extending over for example 180° or 120°. Thereby the form-fitting is no longer ensured. The pressure pushes the segments in a radial direction outwards, while the interlocking structures fall apart. The segments are jettisoned to the side.
- In a preferred embodiment the protective cap is cone-shaped and divided along at least two generatrices of the cone. The connecting means are preferably pyrotechnically releasable. In order to ensure safe sideways pushing of the parts of the protective cap after the release of the connecting means preferably an opening is formed in the protective cap in such a way that pressure builds up in the interior of the protective cap before the release of the connecting means. The opening can be closed by a releasable cover the cover being released shortly before the release of the connecting means. The cover can be released by pyrotechnical means.
- Embodiments of the invention are described below in greater detail with reference to the accompanying drawings.
-
FIG. 1 is a perspective, partly sectional view of the tip of a missile with a two-part conical protective cap wherein an opening is provided in the tip of the protective cap to build up pressure within the protective cap. -
FIG. 2 is a perspective view of the arrangement ofFIG. 1 and shows the release of the connecting means and the opening of the protective cap. -
FIG. 3 is a perspective view similar to the one inFIG. 2 and shows the sideways jettisoning of the two parts of the protective cap. -
FIG. 4 is a perspective view of an alternative embodiment of a protective cap also having an opening for generating a pressure, this opening, however, being closed by a releasable cover in the form of the tip of a cone. -
FIG. 5 is a perspective view similar to the one inFIG. 4 and illustrates the release of the tip of the cone. -
FIG. 6 is a perspective view of the protective cap ofFIG. 5 and shows the dividing of the two parts of the protective cap. - In
FIG. 1 numeral 10 denotes the tip of a missile. Thetip 10 comprises a (non-visible) seeker head, for example an infrared seeker head. Thetip 10 is closed by adome 12, i.e a curved window transparent for infrared radiation. A conicalprotective cap 14 is arranged in front of thedome 12 at thetip 10. Theprotective cap 14 is longitudinally divided along along two diametrallyopposing generatrices parts parts means 24 which are pyrotechnically releasable. By the pyrotechnical release of the connecting means 24 the twoparts FIG. 2 theconnecting means 24 are divided into twohalves - As long as the
protective cap 14 is not divided it is form-fitted connected to the protective cap and the airframe ortip 10 of the missile by the interlocking structures. As can be seen fromFIG. 1 these structures consist of an inwardly projectingledge 26 extending along the airframe-side edge of theprotective cap 14 which interlocks with a circumferential recess at the edge of thetip 10 about an angle of 360°. If theprotective cap 14 falls apart into twoparts parts tip 10 of the missile and are jettisoned to the side, as shown inFIG. 3 . - To support the disengagement and the jettisoning to the side, an
opening 28 is provided in the range of the tip of the cone. Through this opening a pressure builds up in the space within theprotective cap 14 and in front of thedome 12. This pressure acts on the twoparts connecting means 24 are separated and theprotective cap 14 is divided into its twoparts parts - FIGS. 4 to 6 show a different embodiment. Here, the cone-shaped
protective cap 30 consists of three parts, i.e. two at thetip 32 of the missile and adjacent bowl-shaped parts protective cap 30 in the shape of a truncated cone and forming anopening 38 at the front and a cone-shaped cover 40 forming the tip of the cone of theprotective cap 30 and covering theopening 38 and keeping the twoparts - As it is shown in
FIG. 5 , at first thecover 40 is pyrotechnically blown off to jettison theprotective cap 30. Thereby theopening 38 is freed. Through the opening a pressure builds up within theparts parts cover 40 are pushed apart. The form-fitting at the rear end of theparts parts
Claims (7)
1. A guided missile having an airframe, said airframe defining a longitudinal axis, and a jettisonable protective cap being attached to a leading end of said airframe for protection of operative components arranged in said airframe, wherein said protective cap means is longitudinally divided into at least two parts which, together, extend circumferentially through an angle of 360° about said longitudinal axis, each said part extending through an angle of not more than 180°, said at least two parts being interconnectable by connecting means, means for releasing said connecting means; said two parts together and said airframe defining a form-fitting interlocking structure along the airframe-side edge of said protective cap means only upon said two parts being in an interconnected condition, said protective cap having an opening located substantially on said longitudinal axis, said opening facilitating a dynamic pressure to be built up within said protective cap for a sideways detachment from said guided missile coupled by a release of said form-fitting interlocking structure responsive to the build up of said dynamic pressure during flight of said guided missile.
2. A guided missile as claimed in claim 1 , wherein said protecting cap comprises a conical cap divided along at least two cone generatrices.
3. A guided missile as claimed in claim 1 , wherein said releasing means comprise pyrotechnic releasing means.
4. (canceled)
5. A guided missile as claimed in claim 1 , comprising jettisonable closure means attached to said protective cap for closing said opening, and closure member releasing means for releasing said closure means.
6. A guided missile as claimed in claim 5 , wherein said protective cap is frusto-conical comprising at least two circumferentially extending parts each having a front edge and a rear edge, said rear edge adjoining the airframe front edge, and said jettisonable closure means comprise means for engaging said front edge and forming a part of said connecting means, whereby, when said closure means is jettisoned by said closure member releasing means, said dynamic pressure causes said at least two circumferentially extending parts to part sidewise, thereby facilitating release of said form-fitting interlocking structure.
7. A guided missile as claimed in claim 5 , wherein said closure member releasing means comprise pyrotechnic releasing means.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10240040.7 | 2002-08-27 | ||
DE10240040A DE10240040A1 (en) | 2002-08-27 | 2002-08-27 | Guided missile with detachable protective cap |
Publications (2)
Publication Number | Publication Date |
---|---|
US20060169841A1 true US20060169841A1 (en) | 2006-08-03 |
US7093799B1 US7093799B1 (en) | 2006-08-22 |
Family
ID=31197532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/634,485 Expired - Fee Related US7093799B1 (en) | 2002-08-27 | 2003-08-05 | Guided missile having a jettisoned protective cap |
Country Status (3)
Country | Link |
---|---|
US (1) | US7093799B1 (en) |
EP (1) | EP1394497A3 (en) |
DE (1) | DE10240040A1 (en) |
Cited By (7)
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US20090223403A1 (en) * | 2006-01-10 | 2009-09-10 | Harding David K | Warhead delivery system |
JP2014105924A (en) * | 2012-11-27 | 2014-06-09 | Mitsubishi Heavy Ind Ltd | Flying object |
US9132908B1 (en) * | 2013-03-15 | 2015-09-15 | The Boeing Company | Expandable nose cone |
KR101995522B1 (en) * | 2019-01-22 | 2019-07-02 | 국방과학연구소 | Restraint and separation device of noscon cover for small guided rocket and restraint and separation method using it |
CN110749250A (en) * | 2019-10-30 | 2020-02-04 | 中国科学院力学研究所 | Novel hypersonic aircraft safety cover |
KR102488934B1 (en) * | 2022-06-08 | 2023-01-18 | 국방과학연구소 | Front cover with two-way thrust separation |
WO2023215036A1 (en) * | 2022-05-05 | 2023-11-09 | Raytheon Company | Releasable nose cover for seekers, sensitive windows and surface elements on gun launched munitions |
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US20060081343A1 (en) * | 2004-10-20 | 2006-04-20 | Clark Paul R | Retractable protective dome for space vehicle equipment |
US7464900B2 (en) * | 2004-10-20 | 2008-12-16 | The Boeing Company | Folding retractable protective dome for space vehicle equipment |
DE102004053449B4 (en) * | 2004-11-05 | 2010-12-09 | Diehl Bgt Defence Gmbh & Co. Kg | nosecone |
DE102005030090B4 (en) * | 2005-06-27 | 2007-03-22 | Diehl Bgt Defence Gmbh & Co. Kg | Throw-off hood and missile with detachable hood |
WO2009105312A2 (en) * | 2008-01-31 | 2009-08-27 | The Penn State Research Foundation | Removable protective nose cover |
US8061656B1 (en) | 2009-09-22 | 2011-11-22 | The United States Of America As Represented By The Secretary Of The Navy | Hinge apparatus with an actuatable assembly |
IL201585A (en) | 2009-10-15 | 2014-05-28 | Rafael Advanced Defense Sys | Missile nose fairing system |
US8519312B1 (en) * | 2010-01-29 | 2013-08-27 | Raytheon Company | Missile with shroud that separates in flight |
DE102010007064B4 (en) | 2010-02-06 | 2012-03-29 | Diehl Bgt Defence Gmbh & Co. Kg | Missile head and method of separating a hood from a missile body |
FR2960055B1 (en) * | 2010-05-12 | 2015-11-20 | Tda Armements Sas | GUIDED MUNITION PROTECTED BY AERODYNAMIC COIFFE |
FR2966919B1 (en) * | 2010-10-29 | 2013-11-01 | Tda Armements Sas | A SECURE AERODYNAMIC COVER FOR GUIDED MUNITION AND GUIDEED MUNITION COMPRISING SUCH A BOX. |
US8461501B2 (en) * | 2010-11-02 | 2013-06-11 | Raytheon Company | Guided munitions including self-deploying dome covers and methods for equipping guided munitions with the same |
US8497456B2 (en) * | 2011-03-30 | 2013-07-30 | Raytheon Company | Guided munitions including interlocking dome covers and methods for equipping guided munitions with the same |
US8658955B2 (en) * | 2011-04-07 | 2014-02-25 | Raytheon Company | Optical assembly including a heat shield to axially restrain an energy collection system, and method |
US8931738B2 (en) * | 2012-02-21 | 2015-01-13 | Raytheon Company | Releasable radome cover |
US10189578B2 (en) * | 2013-06-12 | 2019-01-29 | The Boeing Company | Self-balancing pressure bulkhead |
US9121668B1 (en) | 2014-02-13 | 2015-09-01 | Raytheon Company | Aerial vehicle with combustible time-delay fuse |
US10254094B1 (en) | 2015-11-16 | 2019-04-09 | Northrop Grumman Systems Corporation | Aircraft shroud system |
FR3065521B1 (en) * | 2017-04-21 | 2019-06-28 | Mbda France | MISSILE PROVIDED WITH A SEPARABLE HEADBOARD COMPRISING AT LEAST ONE EJECTABLE SHELL COOPERATING WITH A SUPPORTING ELEMENT |
US10809045B1 (en) | 2018-05-10 | 2020-10-20 | The United States Of America As Represented By The Secretary Of The Air Force | Forward firing fragmentation (FFF) munition including fragmentation adjustment system and associated methods |
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US11274907B2 (en) * | 2020-04-28 | 2022-03-15 | Raytheon Company | Shroud driven deployable flight surfaces and method |
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US6622971B1 (en) * | 2001-05-22 | 2003-09-23 | Lockheed Martin Corporation | Adapter for connecting rocket stages |
US6854393B2 (en) * | 2002-10-17 | 2005-02-15 | Rafael-Armament Development Authority Ltd. | Soft removable thermal shield for a missile seeker head |
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US20090223403A1 (en) * | 2006-01-10 | 2009-09-10 | Harding David K | Warhead delivery system |
JP2014105924A (en) * | 2012-11-27 | 2014-06-09 | Mitsubishi Heavy Ind Ltd | Flying object |
US9132908B1 (en) * | 2013-03-15 | 2015-09-15 | The Boeing Company | Expandable nose cone |
KR101995522B1 (en) * | 2019-01-22 | 2019-07-02 | 국방과학연구소 | Restraint and separation device of noscon cover for small guided rocket and restraint and separation method using it |
CN110749250A (en) * | 2019-10-30 | 2020-02-04 | 中国科学院力学研究所 | Novel hypersonic aircraft safety cover |
WO2023215036A1 (en) * | 2022-05-05 | 2023-11-09 | Raytheon Company | Releasable nose cover for seekers, sensitive windows and surface elements on gun launched munitions |
KR102488934B1 (en) * | 2022-06-08 | 2023-01-18 | 국방과학연구소 | Front cover with two-way thrust separation |
Also Published As
Publication number | Publication date |
---|---|
DE10240040A1 (en) | 2004-03-11 |
US7093799B1 (en) | 2006-08-22 |
EP1394497A3 (en) | 2007-07-25 |
EP1394497A2 (en) | 2004-03-03 |
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