In Case You Missed It
Wind Tunnel
Recently, there has been increasing interest in the efficiency of all vehicles, including airplanes. Designers are seeking to make airplanes that perform better and burn less fuel. Barnaby Wainfan takes a close look at the aerodynamics and mathematics behind this deceptively complex process.
Engine Beat
Vacuum systems may be an imperfect way to power instruments, but careful monitoring and maintenance can forestall common issues. By Steve Ells.