2025 Engine Buyer’s Guide
Traditional engines dominate, but the alternatives are looking more mainstream.
In Case You Missed It
Aero ‘lectrics
Jim Weir presses the venerable LM317 variable voltage regulator (plus a few other parts) into service as a way to juice up a discharged battery.
Wind Tunnel
This month Barnaby Wainfan turns his attention to the control system and how various aspects such as linkages, the elevator planform and tail aspect ratio, and trailing-edge treatments affect pitch control.