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No. 21675 ID: a16d42
  Huh... that's pretty fast.
Sprint Missile https://youtu.be/kvZGaMt7UgQ
The Sprint missile was part of the ABM or Anti Ballistic Missile system. The missile would carry a 20 kiloton warhead and would travel at hypersonic speeds to find and destroy an incoming enemy ICBM. Watch as the missile approaches speeds upward of Mach 10 in 5 seconds. The missile begins to glow from air friction. The ABM system became functional on October 1, 1975 for one day and was then shut down. See more about ICBMs and ABM systems in the film "Nukes In Space - The Rainbow Bombs."

https://en.wikipedia.org/wiki/Sprint_(missile) The Sprint accelerated at 100 g, reaching a speed of Mach 10 in 5 seconds. Such a high velocity at relatively low altitudes created skin temperatures up to 3400°C (6200°F), requiring an ablative shield to dissipate the heat. It was designed for close-in defense against incoming nuclear weapons. As the last line of defense it was to intercept the reentry vehicles that had not been destroyed by the Spartan, with which it was deployed.
The conical Sprint was stored in and launched from a silo. To make the launch as quick as possible, the cover was blown off the silo by explosive charges; then the missile was ejected by an explosive-driven piston. As the missile cleared the silo, the first stage fired and the missile was tilted toward its target. The first stage was exhausted after only 1.2 seconds, but produced 2,900 kN (650,000 lbf) of thrust. The second stage fired within 1 – 2 seconds of launch. Interception at an altitude of 1,500 m to 30,000 m took at most 15 seconds.
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>> No. 21676 ID: a16d42
  A hypersonic two-stage, solid-fueled anti-ballistic missile, designed as a last resort short-range defense against incoming enemy nuclear warheads in their terminal phase.

It was developed as a counterpart to the long-range LIM-49 Spartan. The Sprint missile was essentially the last card on the table for any enemy nuclear warhead that evaded the initial Spartan intercepts. Because the terminal velocity of nuclear re-entry vehicles is so incredibly high (roughly 17,400 MPH / 28,000 KPH), there is little time to stop them.

In order to rapidly facilitate a launch, the silo doors housing Sprint missiles were blown away by explosive charges, after which an explosively-driven piston kicked the missile from the silo. An instant later, the first stage rocket engine ignited and burned for just 1.2 seconds, accelerating it at 100g with 650,000 pounds of thrust (294,000 kg)

ABM Spartan and Sprint https://youtu.be/5vq4mWyYl2Y
To stop an explosive nuclear weapon...
They designed a fast moving explosive
Launched by an explosive piston
Through silo doors opened by an explosion
Did the Demo guy from TF2 design this thing?
>> No. 21677 ID: a16d42
File 149672114639.jpg - (1.32MB , 4000x3123 , US nuke Safeguard Program ABM N_ Dakota 1.jpg )
21677
This was part of the Safeguard Anti Ballistic Missile System setup in the 1970s to protect the Minuteman II ICBM field out of Grand Forks ND. Originally it was designed to defend a city, but they decided that was crazy so they scaled down the program to defend the missile fields. The system was operational for a week or so before it was deactivated because of a treaty. They built a huge nuclear hardened fire control radar, the MRS that locals called the PAR, and supposedly could detect a basketball sized object as it came over the north pole and Hudson's Bay. The 4 remote sprint launch sites were 20 or so miles away from the main radar. Crazy stuff. The feds abandoned the site and a photography crew went in to document it a few years ago. The local university, the University of North Dakota, is working to purchase the land and use it as a training space for UAVs for its aeronautical program. http://rebrn.com/re/missile-accelerates-at-g-reaching-a-speed-of-mach-in-seconds-beg-2265707/
>> No. 21680 ID: 334c17
  >>21675
>> No. 21681 ID: 334c17
  >>21680
Now that I've checked some recent developments, it turns out that there's a new system, which is a replacement of the old USSR A-135 anti-ballistic defence.

A-135 used to be a stationary, ground-set missile launch complex located all around Moscow, with radar stations positioned at the outer limits of USSR back in the day. It has the main purpose of protecting the capital from incoming nuclear missiles (a limited amount of them, that is), and at that, it uses 2-stage interception system. At longer distances it uses a large, long-ranged nuclear missile with huge thermonuclear payload designed to take out the missile with an explosion, while in shorter distances (in fact, several kilometres from the launch site) it uses short-ranged, very fast missiles to destroy them before the explosion. The maximum flight time is such missile is 12 seconds, and maximum speed is over 2 kilometres per second. Which is why it has a kinetic penetrator instead of any warhead at all.

The new A-235 system is a second attempt (after first attempt was lost in economic decline of 90-s) to replace old vehicles and expand their capability. Compared to that, more famous S-500 anti-ballistic system is a mobile platform with similar purpose, but actually has only one major component instead of several. A-135 and it's successor uses Don-2N radar station, which is functioning is fully automatic mode.


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