Zavala led the way to the nose of the giant plane. Two people in coveralls were bent over a dishlike structure set up on a platform. Al Hibbet smiled when he saw Austin and Zavala walking in his direction.

“Hello, Al,” Austin said. “Having fun yet?”

“The most fun I can remember since I got an electric motor for my Tinkertoy set. Karla has been a big help.”

The other worker looked up and revealed Karla's smiling face under a baseball cap. “What the professor means is that I'm a great help holding a screwdriver.”

“Not at all,” Hibbet said. “Karla may not have a technical background, but she has an instinct for solving problems. She has obviously inherited her grandfather's genes.”

“Glad to hear you're working well together,” Austin said. “Joe said you had a problem with the coil.”

“That's right,” Hibbet said. “In the transmitter ships, they dangled the antenna below the ship. We were going to sling it under the fuselage.”

“Would that be a problem during takeoff?”

“You hit on the problem. This is the radome for the newly designed antenna. I got the idea from some of the setups I've seen on early-warning aircraft. It was Karla's suggestion to redesign the cone to fit into the dome.”

“I used to have guppies in my fish tank,” Karla said. “They have a pouch under their chin that gave me the idea.”

Hibbet whipped a plastic covering off a metal-and-wire construction about twenty feet across. The circular framework that sat in a wooden cradle was shaped like an inverted coolie hat. It was flat on top, with shallow sides coming to a point on the bottom.

“Ingenious,” Austin said. “It looks like a squashed-down version of the cone antenna. Will it work as well?”

“Better, I hope,” Hibbet said.

“That's good, because we've revised our schedule. We need everything ready to fly out by tomorrow morning. Can you assemble the final stages while we're in the air?”

Hibbet pinched his chin. “Yes,” he said after a moment. “It's not the ideal way to do something this complex. We won't even have a chance to test the turbines. But we can start going down the punch list as soon as we mount the antenna and dome. We'd better ask Barrett for his opinion.”

They climbed a gangway into the 747's vast interior. A line of sixteen squat steel cylinders, spaced evenly apart, ran nearly the entire 230-foot length of the airplane's cargo space. A network of cables connected the cylinders and snaked off in dozens of different directions. Barrett was kneeling over a cable between two of the cylinders.

He saw Austin and the others and got up to greet them.

Austin glanced around at the complex arrangement taking up a good part of the plane's enormous interior. “Looks like you've got enough power capacity to light up the city of New York.”