The US Air Force has just issued a rather innocuous-looking notice for a new technology called "active combustion control". But this is quite a momentous development, and here's why.
Today, the air force has two kinds of warplanes that can survive in modern and future combat, in which fighters and bombers have to compete with integrated air defenses as well as increasingly sophisticated enemy fighters.
One kind is the Northrop Grumman B-2A bomber. It's relatively slow, but super-stealthy. It can fly for a long time and drop a lot of weapons.
The other kind is like the Lockheed Martin F-22A. It's extremely fast and also super-stealthy. But it doesn't fly for very long without refuelling and can carry only a couple of strike weapons (okay, eight if you're talking about the Small Diameter Bomb).
The missing link is a single aircraft as nimble as the F-22, as long-range as the B-2 and as at least as stealthy as both. In short, it's the dream warplane for every gadget-hearting air force general.
And it is the basic concept for what the air force now calls the Next Generation Long Range Strike aircraft. It's supposed to be ready to enter service by 2018 to 2020.
The trick to meeting this schedule is for some company to come up with the next breakthrough in aircraft engine technology. The breakthrough is called active combustion control, which is just a fancy name for integrating a fuel injector into an aircraft's propulsion system.
Aircraft engines using active combustion controls should be able to fly longer distances at a lower rate of fuel consumption.
With today's engine technology, the flow of gas into the combustion chamber is fairly unrestricted, which is not very efficient. Many years ago, the automotive industry fixed this problem with fuel injectors, and now the aerospace industry wants to make a similar leap -- although at a far greater level of sophistication.
It's a new spin on old concept. In the past, aircraft designers used variable-geometry wings (think: F-111, F-14 and B-1) to be more efficient in high-speed and cruise-speed. With active combustion controls, the goal is to reconfigure the engine instead of the airframe to be optimal in both states.
The Infantry's Curse
Somebody please help the infantry.
Since the 1960s, think of how many new generations of fighters, naval combatants and fighting vehicles have been deployed?
Contrast that record to the individual firearm -- the rifle, carbine or handgun carried and used by almost any one wearing a uniform. The same basic M16 rifle and M4 carbine first used in Vietnam -- with the same basic flaws still uncorrected -- remain the primary infantry weapons for the US military today.
Why?
Surely, a nation that can muster $250-$300 billion to develop and deliver the Joint Strike Fighter, $160 billion to build a new family of combat vehicles and $8 billion to develop and build a next-generation aircraft carrier can come up with some spare change to upgrade the infantry's arsenal of automatic weapons.
All the services are fond of promoting the concept of dominating any potential threat through superior technology. Yet the M16 and M4 remain matched -- if not inferior -- to the firepower provided by the weapon of choice for insurgents/terrorists/pirates worldwide: the even older AK-47 design and its antecedents.
A new generation of superior guns are available for purchase today, offering improved firepower and less of the reliability problems of the older generation. Examples include the Heckler & Koch 416 enhanced carbine and the FN Herstal Special Operations Combat Assault Rifle (SCAR).
Giving the army more cash may not be the answer. Part of the problem is the way the army manages small arms. Back in the 1950s, the army was so loathe to develop an automatic rifle to compete with the AK-47 that some think it sabotaged tests on the M16. It fell upon Air Force General Curtis LeMay to rescue the M16 program and Secretary of Defense Robert McNamara to compel the army to buy it. Even then, the army sabotaged the M16 by initially filling the cartridge with the wrong gunpowder. (Read more here.)
More recently, the army aborted its plan to replace the M16 with the XM29, which was cancelled in 2005 after a $100 million investment.
The good news is that the commercial marketplace has already solved the army's problem. The question is whether the army is willing to bring itself to make the change.
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