Jerald Gartman
Low-Cost Spark Plug Ohm Tester
This handy tester is rugged enough to be stored in your tool tray with your other spark plug tools without fear of damage. It...
In Case You Missed It
Product Review: Garmin’s New aera
Paul Bertorelli reviews Garmin's latest offering, the aera. It's compact, powerful and versatile.
Product Review: Spidertracks S3 Aviator
The next-gen Spidertracks Aviator satellite tracker offers more features at a better price. What’s not to like? By Marc Cook.
RANS S-7S Courier
Marc Cook pilots the new RANS S-7S and finds many improvements, from increased fuel and storage capacity to a simplified aileron-control system that makes handling better than ever.
Design Process: Slipstream Effects
In preliminary design and for performance calculations, we treat the engine, propeller and airframe...