by Seasick » Sun Jul 02, 2006 11:45 pm
What I was mentioning was the reason that the first 5 Ticonderogas were dropped from the Cruiser Conversion Program.
Here is some info on the SM-2ER Block 4:
The Block IV version was developed to provide extended range [ER], improved cross-range and higher altitude capability for Aegis VLS ships, as well as improved performance against low RCS targets and against complex ECM. The SM-2 Block IV is a kinematic improvement beyond the SM-2 Block III, incorporating a thrust-vector controlled booster, a more robust airframe, and guidance and control modifications for improved altitude/range/cross-range coverage against high-performance, low radar cross-section threats in a stressing electronic countermeasures (ECM) environment. Standard-2 ER incorporates the same midcourse guidance as the MR version.
RIM-67E was an interim designation of the SM-2ER Block IV. The Navy initially proposed the designation RIM-68A for the Block IV missile, in sequence with the RIM-66 and RIM-67. However, the designation RIM-156A was allocated instead.
The Standard Missile-2 Block IV program experienced considerable development problems and schedule delays in 1991. Primarily due to booster problems, the first successful propulsion test vehicle firing was been delayed more than a year. As a result, the initial production decision, once scheduled for the middle of fiscal year 1991, slipped until December 1992, the first quarter of fiscal year 1993. Since only early IOT&E of SM-2 Block IV was conducted to support its LRIP decision, its capability was never fully determined (capability was not demonstrated against ASCM threat representative, maneuvering targets nor against low altitude, low Doppler targets). That is, the Block IV program was restructured, with the intention to proceed to DT&E/OT&E to support a full production decision if technical problems are encountered with development of the SM-2 Block IVA that preclude its retention of Block IV capability (never fully determined) against anti-air warfare threats.
In addition to providing significant increases in ship area defense capability, the SM-2 Block IV is the developmental stepping stone to SM-2 Block IVA, the Navy�s Area Theater Ballistic Missile Defense (TBMD) missile.
What I was mentioning was the reason that the first 5 Ticonderogas were dropped from the Cruiser Conversion Program.
Here is some info on the SM-2ER Block 4:
[quote]The Block IV version was developed to provide extended range [ER], improved cross-range and higher altitude capability for Aegis VLS ships, as well as improved performance against low RCS targets and against complex ECM. The SM-2 Block IV is a kinematic improvement beyond the SM-2 Block III, incorporating a thrust-vector controlled booster, a more robust airframe, and guidance and control modifications for improved altitude/range/cross-range coverage against high-performance, low radar cross-section threats in a stressing electronic countermeasures (ECM) environment. Standard-2 ER incorporates the same midcourse guidance as the MR version.
RIM-67E was an interim designation of the SM-2ER Block IV. The Navy initially proposed the designation RIM-68A for the Block IV missile, in sequence with the RIM-66 and RIM-67. However, the designation RIM-156A was allocated instead.
The Standard Missile-2 Block IV program experienced considerable development problems and schedule delays in 1991. Primarily due to booster problems, the first successful propulsion test vehicle firing was been delayed more than a year. As a result, the initial production decision, once scheduled for the middle of fiscal year 1991, slipped until December 1992, the first quarter of fiscal year 1993. Since only early IOT&E of SM-2 Block IV was conducted to support its LRIP decision, its capability was never fully determined (capability was not demonstrated against ASCM threat representative, maneuvering targets nor against low altitude, low Doppler targets). That is, the Block IV program was restructured, with the intention to proceed to DT&E/OT&E to support a full production decision if technical problems are encountered with development of the SM-2 Block IVA that preclude its retention of Block IV capability (never fully determined) against anti-air warfare threats.
In addition to providing significant increases in ship area defense capability, the SM-2 Block IV is the developmental stepping stone to SM-2 Block IVA, the Navy�s Area Theater Ballistic Missile Defense (TBMD) missile.
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