Field Guide to Flying Death: ICBMs (InterContinentalBallistic Missiles)

LGM-30 Minuteman III ICBM.

The name of every type of missile describes how far it flies. So an ICBM, or Intercontinental Ballistic Missile can travel at least 3,400 miles carrying one or more warheads.  The standard American land-based ICBM, the Minuteman III, can fly 8,100 miles before releasing between one and a dozen individual warheads on target. 

Minot Air Force Base in North Dakota is the center of a missile launch area spread across the northern tier of America with 450 missiles carrying thousands of nuclear warheads. Minot also is home base for B-52 bombers, the main aircraft of the U.S. nuclear bombing force since the Eisenhower administration. 

Our arsenal of ICBMs and other nukes is so overwhelming, that if Putin used nuclear weapons and America responded in kind, the response would not likely come from the America’s land-based missile and bomber fleet.  Lurking in the oceans somewhere are Polaris submarines armed with Trident ICBMs are already on station, within range, waiting for the order to counter attack if Russia uses a nuclear weapon. 

My first job in the Cold War U. S. Air Force was live-fire testing of missiles.  I was assigned to the Aging and Surveillance branch of Air Force Systems Command on Hill Air Force Base, Utah.  

Every Thursday (except Thanksgiving and Christmas week) we unit fired one stage of a three-stage Minuteman missile.  The missiles were randomly selected.  They were pulled from their silo and shipped to Utah.  On the test range we froze them, baked them, put them in an altitude chamber, shook them and finally bolted them to a test pad and lit them up.  The test range was on the west side of the Great Salt Lake. On a clear day, you could see the cloud from firing in Ogden and Salt Lake City on the east side of the lake. 

We made sure the missiles were ready to fly to target. 

Armies win or lose wars for any number of reasons, but in modern war, the difference between winning and losing is often the reliability of the weapon.  Testing those missiles meant American missiles were ready. 

In 1973, at the same time I was on a team test firing every missile from Sidewinder wing rockets to ICBMs, Israel was hit with a surprise attack by three Arab armies who outnumbered Israel 100 to 1.  Israel repelled the invaders and won that war for many reasons.  But one reason was weapon readiness.

Taking tanks as an example, when Jordan rolled its Soviet-made tanks toward Israel across the Golan Heights, one in four of those tanks broke down before getting to the battle.  For every hundred Syrian tanks, only 75 made it to the fight.  Israeli tanks were ready to fight.  It really fucks up your war plans if a quarter of the tanks don’t even shop up, and it affects moral. The other crews are wondering if their tank will break down.  There are few targets easier to hit than a tank sitting still in a battlefield.

The missiles in U.S. submarines and silos are tested to make sure they are ready if needed.  As many failed North Korean tests have shown.  The short life of a launched ICBM is full of stress and strain. 

When Trident, Minuteman or other ICBMs launch, they begin the half-hour-long trip to a target on another continent or just very far away.  The three-stage Minuteman is in boost phase for five minutes, flying out of its silo on the North Dakota prairie to target. By then end of boost phase, the three-stages have burned their solid fuel and fallen away.  The warhead has accelerated from 0 to more than 15,000 miles per hour and has broken through earth’s atmosphere, flying in space.

In the launch phase, the rocket is subject to an average of 5gs of acceleration with two big jerks when one stage burns and falls away and the next stage lights up. The skin temperatures on the missile zoom up from 70 degrees to hundreds of degrees as speed approaches 15,000 mph. As the final stage burns and separates the warhead bursts out of the atmosphere into space, buffeting the warhead at the same time it rapidly cools as it leaves the atmosphere. 

The warhead is now in ballistic phase, coasting at 15,000+ mph to re-entry and target.  If the U.S. launched a Trident Missile from somewhere in the some ocean it would now be flying thousands of miles in 10 or 20 minutes toward its target. 

Less than 100 miles from target, the terminal or re-entry phase begins.  At this point the warhead drops back into the atmosphere heats to thousands of degrees from re-entry friction then delivers one or a dozen warheads to target.  The already baked and frozen warhead heads to thousands of degrees and shakes with hundreds of gs of vibration as it drops back into the upper atmosphere.

American missiles are thoroughly tested for this horrendous ride. Even so, solid fuel missiles are big cans of gunpowder designed to burn rather than explode.  I have seen, and almost been killed by, missiles that blow up when they were supposed to burn. But when they reach their target, ICBMs are apocalyptically deadly.

One Trident ICBM with eight warheads could turn Moscow into rubble. Each Polaris submarine can carry 24 Trident missiles.  Each of the multiple warheads are hundreds of times more powerful than the nukes dropped on Hiroshima and Nagasaki in World War II.  And one submarine fully loaded with Trident missiles can deliver 192 warheads on target.

If these terrible missiles are ever launched, the destruction will be beyond anything in history.