Split Missile Nosecone Jettisoning via Active Separation
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Solution Overview
Problem
Existing jettisonable nosecones for missiles are difficult to retrofit and can collide with the missile during separation, especially during slow flight phases, and may not be effectively separated if ram-air pressure is not achieved.
Innovation Solution
A longitudinally split nosecone held together by detachable connecting means that actively move apart when released, allowing safe separation in any flight phase, with the connecting means activated via a pyrotechnic or gas-driven mechanism to minimize collision risk and facilitate easy retrofitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a nosecone is designed as an integral structure held by holding elements or hinged joints, then the nosecone can be securely attached to the missile, but the jettisoning mechanism becomes complex and risks collision with the missile during separation
Solution Approach 1:
The nosecone is divided into two separate half-nosecones that can be independently attached and jettisoned. Each half-nosecone is secured by its own connecting means (screws or bayonet fittings), eliminating the need for complex holding elements or hinged joints. The segmentation allows each half to be independently separated from the missile, reducing the complexity of the overall jettisoning mechanism while maintaining secure attachment during flight.
2Ease of operation
If a nosecone is jettisoned using spreading-open or pivoting mechanisms, then the nosecone can be separated from the missile, but the jettisoned nosecone may collide with the guided missile
Solution Approach 1:
By dividing the nosecone into two halves, each half can be independently jettisoned in opposite directions away from the missile. The connecting means are designed to release each half independently, causing them to separate radially outward rather than spreading open or pivoting along the missile body. This segmentation eliminates the collision risk by ensuring each half moves away from the missile in a controlled manner.
Solution Approach 2:
Instead of actively pushing the nosecone halves away from the missile using complex mechanisms, the connecting means are designed to passively release and allow the halves to separate under their own momentum and aerodynamic forces. The inversion approach transforms an active ejection mechanism into a passive release system, reducing complexity and collision risk.
3Productivity
If a nosecone opens in the form of a 'beak' using ram-air pressure, then the nosecone can be jettisoned, but it cannot be jettisoned during slow flight phases when ram-air pressure is insufficient
Solution Approach 1:
The connecting means are designed with preliminary release mechanisms that can be activated independently of ram-air pressure. Pyrotechnic initiators or manual release mechanisms are pre-positioned to break or disengage the connecting means (screws or bayonet fittings) before the nosecone halves separate. This preliminary action ensures reliable jettisoning in all flight phases, including slow flight where ram-air pressure is insufficient to drive the passive opening mechanism.
4Adaptability or versatility
If existing missiles are retrofitted with jettisonable nosecones, then the missiles can benefit from improved seeker protection and jettisoning capability, but the retrofitting process becomes complex and difficult
Solution Approach 1:
The connecting means are designed with universal attachment features that can be adapted to various missile types. Standardized screw threads or bayonet fitting interfaces allow the same half-nosecone design to be retrofitted onto different missile platforms without requiring custom-designed mounting mechanisms. This universality simplifies the retrofitting process while maintaining secure attachment and reliable jettisoning capability across different missile systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures safe and reliable jettisoning of the nosecone at various flight speeds and phases, reducing the risk of collision with the missile and allowing for easy integration with existing missile systems.
Implementation Method 1
The connecting means comprise a connecting pin which is filled with a propellant charge that can be initiated, and a piston which fits into the connecting pin and can be moved in the longitudinal direction of the connecting pin by initiation of the propellant charge
Implementation Method 2
a propellant charge that can be initiated, and a piston which fits into the connecting pin and can be moved in the longitudinal direction of the connecting pin by initiation of the propellant charge
Data Source
AI summary
A jettisonable nosecone (10) for a missile is specified, which nosecone (10) is longitudinally split into at least two parts (15, 16) and is held together by detachable connecting structures, in which case the connecting structures are designed to actively move the at least two parts (15, 16) away from one another when released. A missile having a correspondingly designed nosecone (10) is also provided. A nosecone (10) of this type allows simple jettisoning during every flight phase of the missile, and is also suitable for retrofitting to an already existing missile.