Boeing’s 747 Laser Canon
Tue, Jan 6, 2009
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Image : A World at War
With a range of up to five miles at a flying height of 10,000 ft, this 40,000 pound chemical laser, which is fitted to an adapted Boeing 747, can take accurate aim at speeds of up to 300mph. This modified military jumbo jet is equipped with the latest in airborne laser weapons technology, for identifying, tracking and shooting down missile threats.
The YAL-1 Airborne Laser (ABL) has been some twelve years in the making. Now, after various stages of testing and the odd hold-up, it looks likely to be given the green light for an in-flight missile shoot-down sometime in 2009.
Seekin’ and a-destroyin’: artist’s impression of the airborne laser in action
Image: Missile Defense Agency
The ABL is a megawatt-class chemical oxygen iodine laser (COIL), assisted by six infrared sensors and two kilowatt-class solid-state lasers. Watt? Basically, the ABL’s infrared sensors detect the bright hot exhaust plume of a missile that’s boosting off up to a few hundred kilometres away. Within seconds, the two lower-powered lasers track the missile’s course and pinpoint an impact spot, while adapting to atmospheric distortions like air turbulence.
Moments later, in comes the big gun, the COIL itself, which is made up of six SUV-sized modules to the rear of the plane. The laser beam travels down the length of the aircraft, the huge turret in the nose swivels towards the target, and telescope mirrors inside steer the beam onto the missile. It fires for three to five seconds, heating and softening the missile’s shell so that – boom! – it blows up mid-flight. Cue the high fives and victory whoops.
Is that a gun in your cockpit? The ABL’s turret, reckoned to be the world’s largest
Image: Missile Defense Agency
But are there any drawbacks to this missile-zapping laser, for the environment and for people?
The directed-energy laser is fed with a compact mixture of chemicals not unlike rocket propellant. To get the COIL’s iodine molecules excited and emitting the photons that do the damage, they’re mixed with hydrogen peroxide and potassium hydroxide – chemicals found in hair bleach and drain cleaner. Chlorine gas is used too – nasty stuff employed in warfare for its noxious effects – but traces of it are said to be removed from the exhaust gases. Not exactly rose water, then, but not quite mustard gas either.
According to one report, during a five second burst the high-octane laser produces enough energy to power an average American home for over an hour. This may not seem dazzlingly energy efficient; but once it has been built, firing such a pure energy weapon carries a fraction of the energy cost of launching equivalent missiles, with the extra resources and fuel they require. A fraction of the actual cost too, so good news for the military budgeters.
You know, Bill, that thing kinda reminds me a something: laser turret exposed
Image: Credit: Air Force photo by Bobby Jones
So what else might this sharp-shooting addition to the missile defense system have its sights trained on?
Though the laser could be deployed against other aircraft, their jets probably wouldn’t give off enough heat to be detected effectively by the ABL’s infrared sensors. Elsewhere, ground targets would be tricky to track; and firing the laser down through the atmosphere would weaken the beam – which wouldn’t be potent enough to penetrate tough armoured vehicles. That said, somewhat more ominous plans are afoot to expand the ABL’s scope against other traditional targets. Watch this airspace; just be sure to wear your mirrored shades.
Collateral damage, meanwhile, should in theory be minimised by the ABL’s surgically precise targeting. However, there is the rather less surgically precise danger of debris from destroyed missiles falling on civilians in enemy territory and people in nearby countries. There’s also the small chance of birds flying into the 1.5m-diameter laser beam and being vaporised – particularly as it’s invisible to the naked eye – though the risk should be reduced by the brief duration for which it’s fired. Some comfort for ornithologists then.
Shoot to missile-kill: the ABL in flight
Image: US AirForce
Though it might not exactly be on every environmentalist’s New Year wish list, with its lethal speed of light capabilities the ABL is sure to be a smash hit with the gung-ho as well as the Star Wars geeks. Stay on target.
Sources: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
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1 Trackbacks For This Post
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A Plane That Shoots Lasers at Missiles. Or Other Stuff. | Jim On Light Says:
January 18th, 2009 at 12:33 am[...] out the series of articles leading up to this post – there are a LOT. Originally it came from Environmental Graffiti, and they got it from a ton of other sources. Here’s the official Boeing page, and a page [...]
January 7th, 2009 at 9:41 pm
“The YAL-1 Airborne Laser (ABL) has been some twelve years in the making.” might be misleading. I worked on a visiting laser-plane, from Wright-Patterson AFB if I remember correctly, slightly smaller than a 747 yet bigger than a C-130, completely outfitted with laser components of all kinds. The various chemicals and unbelievable piping job inside the plane astounded me at the time – prior to my 1979 exit from the Air Force. While I can’t say that the plane I worked on used the YAL-1 nomenclature it likely utilized components and engineering gleamed from more than 3 decades of laser work, not twelve years. My recollection was that this plane shot the laser out the back, on the tarmac, blasting holes in stationary plexiglass cubes for focusing purposes, prior to its performances in the air.
Casey
January 8th, 2009 at 12:46 am
But what pressing world problem does it solve? As usual, a ghost enemy of your own potential in size has been invented, for a really expensive mass of technology designed to kill it? and no real world problems are solved! Please, turn your skills to supporting humanity in its struggle to peacefully co-habit the planet. We need, in America, for survival of the (GRD) great republican depression, GMO’ed bug proof and fast growing veggies, super insulation for low prices, Solar cells to charge better storage batteries to keep us out of the dark, Improved Solar Power Plants, Improved Wind generation, Cheaper medical services for all Americans, cheaper better microwave cooking methods so we can use solar and wind power to prepare our food, water cleaning, recycling systems, battery cars, aquaculture systems for protein in our Post GRD diet, a means of transporting and storing solar, wind, wave, and water current electricity – and the list goes on! The American people are BROKE !!! and you assholes give us bills for hypothetical armaments for imaginary enemies! WTF!!
March 9th, 2009 at 6:22 pm
If this airborne laser weapon were to destroy only a single missile fired by a belligerent, then potentially many thousands of lives, perhaps even millions could be saved. Surely that is a net environmental benefit that outweighs the relatively small cost of the pollution/debris generated by the destruction of the missile? The intended victims would likely agree.
The continued efforts of the totalitarian rulers of North Korea towards acquiring nuclear weapons and ICBM capability makes this airborne laser system all the more necessary as a responsible means of self-defense.
There are times when the issue of environmental impact has to take a back seat to larger considerations in achieving a proper ethical and moral balance. This is one of them.