The aviator took the parts to the table and began putting them together.

"We'll make this a lesson," he said. "So fire in your questions."

"Well, I'd like to know how much that weighs?" complied Fly at once.

"About thirty pounds."

"Is it all there?" continued Fly.

"All but the engine."

"An' how much does a real one weigh—I mean a big one?" asked Dunk.

"Well, a full-sized machine built after this design would reach a weight of about 1,100 pounds or over, with the load."

"How fast would it go?" asked Herb.

"About forty miles an hour," replied Hawke.