INSIDE HURRICANE IKE — Amid the engines' roar, the Air Force Reserve pilots and navigator worked calmly as their huge plane neared the eyewall of Hurricane Ike.

The gray cloud, looming 50,000 feet into the sky like a colossal concrete barrier, was 4 miles thick, and the Lockheed WC-130J was hurtling into it.

"It's a big one, and it's going to get bigger," said Lt. Col. Mark Carter, 54, a pilot who has chased storms for 31 years. "It's off land now, and feeding on the warm water down there while it gets itself back together."

"Down there" was 10,000 feet below, where the swirling dark water and foaming waves of the Gulf of Mexico were only visible intermittently through the clouds.

Carter and his fellow hurricane hunters of the 53rd Weather Reconnaissance Squadron were finishing a fourth trip across Ike, during a 10-hour, 3,000-mile trek to monitor the storm that later slammed into the Texas coast.

The aircraft carved a 210-mile giant "X" pattern through Ike and its eye, when the storm was just off the western tip of Cuba.

"We're the only military aircraft that has permission to fly through Cuban airspace," said public information officer Maj. Chad Gibson. "We share the information we gather with them."

Using high-tech equipment aboard the $72 million plane, the crew gathers data on wind speed, barometric pressure and other information for the National Hurricane Center.

"The plane makes two observations a second," said Maj. Deeann Lufkin, 35, a meteorologist who stood behind a bank of screens as she monitored the storm.

Lufkin, who has more than 50 hurricane flights behind her, took the jostling of the storm as easily as a New York City subway rider handles rush hour.

Like everyone on the crew, Lufkin, of Northfield, Minn., is an Air Force Reservist — a civilian who works summers with the hurricane hunters, based at Keesler Air Force Base in Biloxi, Miss.

"I love this job," said Lufkin, whose husband is also a hurricane hunter. "It is endlessly fascinating, and it is also extremely important. We provide information the satellites can't get. And we provide something satellites will never have — a human eye and brain."

The C-130 has been a workhorse of the U.S. military for nearly five decades. It's a squat, broad aircraft, painted dull gray, with four black propellers curving over the wings like exotic flowers.

Inside, it resembles a high-tech auto mechanic's garage. Metal grids on the floor offer secure places to stash equipment, insulation covers most of the walls and ceilings, wires shake everywhere, red mesh behind the armless seats offers something to grab onto when the plane starts bucking and tilting in a storm.

Flights can run as long as 15 hours, not counting preflight and post-flight briefings.

Once ordered into a storm, the 10 crews, made up of six people each, fly on a rotating basis, 24 hours a day, seven days a week.

The flights go into everything from developing tropical storms to Category 5 hurricanes. But they don't fly into a storm over land because of the danger of tornadoes.