Publisher CommentsWilliam Gurstelle is the author of Backyard Ballistics, Building Bots, and The Art of the Catapult. He lives in St. Paul, Minnesota.
From the Hardcover edition.
1. high-power
ROCKETS
Your finger hovers over the red button, and you move the microphone close to your mouth. You test the public-address system and are relieved to find that it works: When you speak, your voice is clearly heard all over the firing range.
Several hundred feet away is the launch pad, and on it stands the culmination of many hundreds of hours of labor and many thousands of dollars of your hard-earned discretionary income. I... read more>>>
