The U.S. military's program to replace the Humvee has had more ups  and downs than the road on which they are tested, but things look to be  moving forward. 

 Above, an artist's  rendering of Lockheed Martin's entry into the JLTV competition.   (Lockheed Martin) 
U.S.  Army and U.S. Marine Corps leaders trimmed a lot of extras to cut the  Joint Light Tactical Vehicle (JLTV) cost by $100,000. This also will  slice 16 months from the $52 million engineering, manufacturing and  development phase, which will end in May 2012. That means the $270,000  base vehicle will come cheaper and sooner, as a single contract award is  now scheduled for 2015. 
The Army wants at least 20,000 JLTVs with the potential  for a larger buy for the program with an estimated worth of $20 billion.  Army officials plan to replace a third of their 150,000-vehicle Humvee  fleet with the JLTV. The Marine Corps plans to buy 5,500.
The  services are now trying to convince the Senate Appropriations Committee,  which had recommended the JLTV program be terminated, to come along for  the ride.
"We spent all the time with the Marine Corps getting  the requirements right that we frankly didn't tell the story to you all,  to the Senate, and particularly the Senate Appropriations Committee  about the good work that is going on," said Lt. Gen. Robert Lennox,  deputy chief of staff for U.S. Army programs.
The new vehicle,  outlined in an Oct. 3 draft request for proposal, will have the  survivability of a mine-resistant, ambush-protected vehicle, better  mobility than a Humvee and the ability to add mission kits. It will be  transportable by ship or helicopter and be able to provide 30 kilowatts  of exportable power. Six variants with companion trailers will make up  the JLTV family, which will include a four-seat, close-combat weapons  carrier, a two-seat utility carrier and shelter, a four-seat general  purpose vehicle, a heavy guns carrier and  command-and-control-on-the-move vehicle.
The latest changes  include an increase to allowable weight from 12,600 pounds to 14,000  pounds. The original number was needed so the Marine Corps' CH-53 Sea  Stallion could sling load the JLTV at high altitudes and high  temperatures. But industry teams would have to experiment with exotic  materials to reach such weight, said Katheryn Hasse, Lockheed Martin's  director of tactical wheeled vehicles. 
And while most initial  entries could produce as much as twice the required 30 kilowatts of  external power, the new standard will cut weight and cost.
Critics  have ripped the program's lengthy technology development phase, but  service officials wouldn't have been able to reach the requirement  consensus without it, said Col. David Bassett, the Army program manager  for Tactical Vehicles.
Four defense teams led by BAE Systems,  Lockheed Martin, Oshkosh Defense and General Tactical Vehicles, a joint  team of General Dynamics Land Systems and Humvee-maker AM General, have  developed prototypes and will submit bids for the EMD phase. Three will  be selected to move forward. Officials are mum on a lot of the details,  as they don't want to show their hand before placing their bets. But  here is a taste of what is to come:
BAE Systems
BAE Systems delivered 11 JLTVs for the TD phase, which is 12 months of rigorous government testing.
The  vehicle, now in its fourth generation, is designed with payload,  protection and performance in mind but is scalable for future  technologies, said Deepak Bazaz, program manager.
If the decision  were made on looks alone, the sleek BAE vehicle would have this in the  bank. But this isn't a beauty pageant, and BAE knows it. So its  bottom-up design is centered on the soldier. The company even calls the  vehicle a "Valanx," a combination of the ancient Greek "phalanx"  formation designed to protect soldiers in combat, with a nod to the  V-shaped hull designed to deflect a mine blast away from the vehicle.
BAE  also teamed with the existing commercial base in a strategy to keep  production and spare parts costs down, Bazaz said. Northrop Grumman has  the lead on command, control, communications, computers, intelligence,  surveillance and reconnaissance. The vehicle comes with a Navistar  engine, Allison transmission and Meritor suspension.
Clip  structures forward and back take the load into the suspension system to  provide greater survivability. Ground height is not set, though earlier  variants had a 24-inch max standoff. Simply put, the higher the vehicle  is, the farther away the soldier is from a roadside bomb blast. 
Officials  said they "prefer not to share specific numbers" as the program  approaches the EMD competition but are "very confident" the vehicle will  meet reliability and fuel economy requirements. Bazaz also said the  vehicle will achieve weight standards "with margin."
"It all comes  down to performance against the requirements," he said. "We've got a  very compliant vehicle at an affordable price point because of our  commercial relationships and our partner strengths with our expertise in  survivability. When you put all of that together, you get a very strong  combination that we can bring to the Army."
General Tactical Vehicles
The  General Dynamics/AM General team is finishing the redesign on a vehicle  that combines the General Dynamics' skills in survivability with AM  General's experience in this arena. And the influence of the latter is  evident when looking at the vehicle, which some have described as a  "Hummer on steroids."
The GTV JLTV incorporates the Stryker's  double-V hull, said Mike Cannon, senior vice president of ground combat  systems for General Dynamics. 
"Lessons learned out of the TD  phase are really going to inform us on the EMD phase," Cannon said. "We  did not pay enough attention to quality going in the TD phase, but we're  going to be dead on it in EMD. We're going to be all over it." 
The  tag team is also exploring other nondevelopmental capabilities,  primarily relief from the height requirement. The company looked to  negotiate a change during a private, two-hour session with program  leaders that was offered to each company last week. Cannon said the  height requirement would force them to reduce either the space between  the vehicle and a roadside bomb or the crew space, and the company is  not interested in an adjustable suspension because it adds a lot of  cost. 
"We have a really strong partner," Cannon said. "We have  strong capabilities, systems integrators, systems engineering and  survivability. That's our forte." 
Lockheed Martin
Lockheed's  JLTV is designed to bridge the capability gap between the Humvee and  MRAP All-Terrain Vehicle by boosting mobility, payload and force  protection, Hasse said. 
The V-hulled vehicle achieved MRAP-level  blast protection Oct. 4 while weighing 40 percent less than the M-ATV.  Lockheed, which has partnered with BAE Global Tactical Systems, has  logged more than 160,000 testing miles and has a fuel efficiency of 12  miles per gallon with the Gunner Protection Kit - a 50 percent increase  over a Humvee with no armor. The company also is designing the JLTV to  13,800 pounds to provide a margin for growth and is confident it will  hit the reliability requirement of 3,600 mean miles between failure.
"Are  we there today? The answer is no," Hasse said. "But we will begin the  EMD phase at a very substantial level of reliability … about 3,600 mean  miles between hardware mission failure. That is a very reliable base to  continue to tweak the design and take the corrective actions to achieve  the level of reliability the government desires.
Soldiers will  especially like the user-friendly crew cab, which was designed around  the war fighter. Lockheed leveraged its aerospace background and systems  integration experience to incorporate a substantial amount of  capability into the dashboard, which frees space for the war fighter.
"We're  going to provide the levels of force protection that the Army requires,  which are substantially more than JLTV was and originally intended to  do, and we're going to do it in a package that is very reliable," Hasse  said. "We've already proven that in our TD program and our internal  testing program."
Oshkosh Defense
Despite its strong showing with the M-ATV, Oshkosh is the new kid on the JLTV block as it did not participate in the TD phase.
But  that doesn't cause Rob Messina, vice president for defense engineering,  to lose any sleep. His Light Combat Tactical All-Terrain Vehicle, or  L-ATV, is the sixth generation in a light vehicle family in which  Oshkosh has invested more than $60 million. "We can show reliable  history, well-developed components and performances that are in the  range the customer is looking for," he said.
This latest evolution  leverages the M-ATV's modular and scalable protection. It replaces the  diesel-electric power train with an electric power train, but its key  strength is its mobility. The vehicle includes the TAK-4i intelligent  suspension system. Built on 10 years of operational experience in Iraq  and Afghanistan, the system provides up to 20 inches of independent  wheel travel. These combine to provide a vehicle that is 50 percent  faster off-road than the M-ATV, Messina said.
Improved shock  absorption also allows high speed on rough terrain while keeping  passengers comfortable and lowering driver fatigue. Messina would not  say where the L-ATV stands on reliability, fuel efficiency or weight,  but he said the Marine Corps' high-hot requirement, which is 12,600  pounds, is achievable with the base variant.
Messina said he is  confident Oshkosh can provide a "threshold or better performance" at the  cost requirement - so confident, in fact, that Messina said he will be  asking Army leaders to change their policy and give credit for  performance above threshold.