It made a terrific racket, and the whole machine vibrated as though it would shake apart.
"He hasn't got it well enough braced," said Tom to Ned.
"Out of the way, now, everybody!" yelled Andy. "Keep away or you'll get hurt! I'm going up!"
He climbed into the cabin of the craft, and took his position at the steering-wheel. The speed of the motor, its racket and its stream of sparks increased.
"Let go!" cried Andy to those who were holding his craft.
They released their hold. The triplane moved slowly across the ground, gathered speed, and then, under the impulse of the powerful propellers, ran rapidly over the meadow.
"Hurrah! There he goes!" cried Sam.
"Yes! Now he's going to fly," proudly added Pete Bailey, the other crony of the bully.
"He'd better fly soon, then, or he'll be in the ditch," said Tom grimly, for a little, sluggish stream crossed the meadow not far from where Andy had started.
The next instant, thinking he had momentum enough, Andy tilted his elevation plane. The clumsy triplane rose into the air and shot forward.
