the propellers," he added, with a longing glance at the smooth, wooden blades.
"One thing at a time," answered Dick, with a laugh. "We'll try the engine, but we'll have to tie the biplane fast, or else it may run into something and get smashed."
"Let us run her out into the field first. It's too gloomy in the shed. I'll hammer in some stakes and tie her."
The biplane rested on three small rubber-tired wheels, placed in the form of a triangle. Thus it was an easy matter to roll the big machine from the shed to the level field beyond. Then Tom ran back and procured some stakes, several ropes, and a hammer, and soon he had the biplane staked fast to the ground, after the manner of a small circus tent.
"Now she can't break loose, even if you do start the engine and the propellers," said he, as he surveyed his work. "Go ahead, Dick, and turn on the juice!" he cried impatiently.
Dick Rover was just as anxious to see the engine work, and after another critical inspection he turned on the battery and then walked to one of the propellers.
"We'll have to start the engine by turning these," he said.
"All right!" cried Tom, catching hold of the
