Nose cone: Difference between revisions
Content deleted Content added
No edit summary |
←Blanked the page |
||
| Line 1: | Line 1: | ||
{{For|the Transformers character|Nosecone (Transformers)}} |
|||
[[Image:titan3 centaur nose cone.jpg|thumb|A nose cone that contained one of the [[Voyager program|Voyager]] spacecraft, mounted on top of a [[Titan IIIE|Titan III]]/[[Centaur (rocket stage)|Centaur]] [[launch vehicle]].]]i like to have sex i like big titties i like pussy cats |
|||
[[File:aa oneworld b777-200er n791an arp.jpg|thumb|right|[[Boeing 777#777-200ER|Boeing 777-200ER]] of [[American Airlines]]. The nose cone is the most forward [[fuselage]] piece (painted white here).]] |
|||
[[File:typhoon f2 zj910 canard arp.jpg|thumb|right|The nose cone of an [[Royal Air Force|RAF]] [[Eurofighter Typhoon|Typhoon]] F2.]] |
|||
The term '''''nose cone''''' is used to refer to the forwardmost section of a [[rocket]], guided [[missile]] or [[aircraft]]. The cone is shaped to offer minimum [[Aerodynamics|aerodynamic]] resistance. Nose cones are also designed for travel in and under water and in high speed land vehicles. |
|||
==Rocket== |
|||
On a rocket vehicle it consists of a chamber or chambers in which a satellite, instruments, animals, plants, or auxiliary equipment may be carried, and an outer surface built to withstand high temperatures generated by [[aerodynamic heating]]. Much of the fundamental research related to [[hypersonic]] flight was done towards creating viable nose cone designs for the [[atmospheric reentry]] of spacecraft and [[Intercontinental ballistic missile|ICBM]] [[Multiple independently targetable reentry vehicle|reentry vehicles]]. |
|||
In a [[satellite]] vehicle, the nose cone may become the satellite itself after separating from the final [[Multistage rocket|stage]] of the rocket or it may be used to shield the satellite until orbital speed is accomplished, then separating from the satellite. |
|||
==Aircraft== |
|||
On airliners the nose cone is also a [[radome]] protecting the [[weather radar]] from aerodynamic forces. |
|||
The shape of the nose cone must be chosen for minimum drag so a [[solid of revolution]] is used that gives least resistance to motion. The article on [[nose cone design]] contains possible shapes and formulas. |
|||
==Hypersonic== |
|||
Due to the extreme temperatures involved, nose cones for high-speed applications (e.g. hypersonic speeds or atmospheric reentry of [[orbit]]al vehicles) have to be made of [[refractory]] materials. [[Pyrolytic carbon]] is one choice, [[reinforced carbon-carbon]] composite or [[HRSI]] ceramics are other popular choices. Another design strategy is using [[atmospheric reentry#Ablative|ablative heat shields]], which get consumed during operation, disposing of excess heat that way. Materials used for ablative shields include, for example [[carbon phenolic]], [[polydimethylsiloxane]] [[Composite material|composite]] with [[silica]] filler and [[carbon fiber]]s, or as in of some Chinese [[Fanhui Shi Weixing|FSW]] reentry vehicles, [[oak]] [[wood]].<ref> |
|||
{{cite web |
|||
| url = http://www.fas.org/nuke/intro/missile/basics.htm |
|||
| title = Ballistic Missile Basics |
|||
| accessdate = 2008-02-03 |
|||
| work = Special Weapons Primer |
|||
| publisher = Federation of American Scientists |
|||
}}</ref> |
|||
In general, the constraints and goals for atmospheric reentry conflict with those for other high speed flight applications; during reentry a high drag blunt reentry shape is frequently used, which minimises the [[heat transfer]] by creating a [[shock wave]] that stands off from the vehicle, but some very high temperature materials may permit sharper edged designs. |
|||
==Nose cone design== |
|||
{{main|Nose cone design}} |
|||
Given the problem of the [[aerodynamic]] [[design]] of the nose cone section of any vehicle or body meant to travel through a compressible fluid medium (such as a [[rocket]] or [[aircraft]], [[missile]] or [[bullet]]), an important problem is the determination of the nose cone geometrical shape for optimum performance. For many applications, such a task requires the definition of a [[solid of revolution]] shape that experiences minimal resistance to rapid motion through such a fluid medium, which consists of elastic particles. |
|||
== See also == |
|||
* [[Droop-nose]] |
|||
* [[Inlet cone]] |
|||
== References == |
|||
{{reflist}} |
|||
[[Category:Rocketry]] |
|||
[[fr:Coiffe (astronautique)]] |
|||