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Originally posted by tomcat ha
wow that is indeed one fast missile
any translation on what is said in the video possible?
Originally posted by knowneedtoknow
russia test a missile the 53T6 Gazelle i like the speed of that 10000 miles it's a Anti-ballistic only good for 250km. And no i don't like wars.
To say Sprint was a phenomenal missile, is putting it mildly. A cone shaped missile that accelerated at 100g, achieved a speed of Mach 10 in 5 seconds, had an ablative coating to dissipate the heat that was generated from the fiction from the atmosphere and was so accurate that the radar had to be de-tuned during testing so that it would not hit incoming RVs. It was a phenomenal missile.
Sprint came about from a study that started in 1959 as a result of identifying the need for a quick acting last ditch missile to intercept incoming RVs, specifically those from sea-launched ballistic missiles (SLBM) and to also intercept RVs that may have got through the higher layer defence. It took three years of research before the study concluded that with the use of phased array radars and appropriate heat shielding, such a terminal defence missile was possible. As a result, in January 1963, the DoD directed that the Nike-X system be developed which included not only the Nike-EX missile (subsequently Spartan), but also another missile called Sprint. In March 1964, Martin Marietta was awarded the development contract for the Sprint missile.
Air friction alone during flight of the missile generated temperatures of up to 3400°C (6200°F), and the ablative heat shield could dissipate heat at rates up to 850 BTU/ft/sec. Sprint was also constructed to withstand shocks up to 25,000Gs which meant it could handle nearby nuclear explosions and their resulting blast (how hardened it was to EMP and radiation is unknown). When in flight, the missile was surrounded by a plasma sheath which the command signals from the MSR were able to penetrate. This was achieved due to the sheer high power of the MSR (a beam that was less than 1 degree wide, and had a power of at least 1MW).
The installation at Grand Forks reached initial operational condition in April 1975 with 28 Sprint and 8 Spartan missiles. It was declared fully operational on 1 October 1975 with 70 Sprint and 30 Spartan missiles.
On 2 October 1975, the US Congress voted to shut down the system. A final bill was passed in November 1975 that allowed the PAR to continue to function, but the MSR was to be turned off, and the missiles disarmed and removed. Starting in February 1976, the US Army shut down the MSR and started to remove the warheads from the missiles as well as removing the missiles from their launching cells. The site had barely operated for 5 months.
It seems strange that the US Congress voted to shut the system down after it had been operational for barely 24 hours. The were many reasons why it was done. Many were political, and some were technological. It had been known for many years, that the system could be overwhelmed by the Soviets if they used multiple warheads on their missiles - the Soviets were arming their missiles with MIRVs. It was also felt that the huge radars were very vulnerable to attack and represented a critical failure point of the system, even though they had been designed with highly redundant systems and hardened against nuclear attack. Although these were well known problems with the Safeguard system, and all other systems before that, Congress just lost the ability to continue to support it.