Within its steel frame and aluminum skin, our 15-foot backyard rocket encompasses microcontrollers and LEDs, pneumatics, vibration and sound effects, and the joy of making.
BY JON HOWELL AND JEREMY ELSON
RARELY DOES BUILDING A TREEHOUSE require welding, grinding, painting, riveting, bending, crimping, plumbing, brazing, laser cutting, sound design, printed circuit board fabrication, distributed network protocols, an embedded operating system, sewing, and even embroidery. Ours did: a backyard rocket-ship treehouse.
The Ravenna Ultra-Low-Altitude Vehicle (RULAV), named for our neighborhood in Seattle, Wash., is ...