![[Credit: Lisa Credit]](https://www.kitplanes.com/wp-content/uploads/2026/10/Experimental.jpg?w=265&h=198&crop=1 "Have You Seen Your Oplims?")
![[Credit: Andrew Robinson]](https://www.kitplanes.com/wp-content/uploads/2026/10/737_VGs2.jpg?w=265&h=198&crop=1 "Vortex Generators")
![[Credit: Van's Aircraft]](https://www.kitplanes.com/wp-content/uploads/2026/10/Vans_RV14A.jpg?w=265&h=198&crop=1 "Something New On The Horizon")
![[Credit: Lisa Turner]](https://www.kitplanes.com/wp-content/uploads/2026/10/Chute-Topaz-Gigapixel-2x-scale.jpg?w=265&h=198&crop=1 "Should You Consider A Whole Aircraft Parachute?"){kind=tracking}
Engine Beat
Steve Ells surveys those in the know for tips about what to consider when contemplating the purchase of a used aircraft engine.
Ask the DAR
Can you use Function Code 33 to amend Experimental aircraft limitations and flight-test locations?
Aero ‘lectrics
Transistors don't like excessive heat, but there's a way to beat it: an engineered heat sink.
Wind Tunnel
When conducting aerodynamic testing related to airflow over an object, how do you ensure that you've matched the conditions from one test to another, and why does it matter?
On Safari
Builder Rick Reese applies state-of-the-art quality assurance techniques to the building of his exceptional Safari helicopter. By Mary Bernard.
SeaRey LSX Amphibian
Progressive Aerodyne has a new version of its kitbuilt amphibian, the SeaRey LSX, and the updates to the design live up to high expectations. By Ed Wischmeyer.
Helping Hands in the Plansbuilt Hangar
An appreciation for Steve Wittman's ingenious design and the community of those who build from plans.
What’s New
A new idle gear for the IO-540, Glasair sets Reno speed record, activate your engine pre-heater with a cell phone and more. Edited by Mary Bernard.
Portable Coms Compared
Which portable VHF transceiver comes out on top after a side-by-side test in the field?
In Case You Missed It
Aero ‘lectrics
Columnist Jim Weir comes up with what he thinks is the optimal design for getting power from the 12-volt aircraft battery to the LED without wasting any.
Engine Update
Lycoming makes a push into the Light Sport Aircraft market with its new O-233 engine. Though similar in appearance to the venerable O-235, it’s an entirely new design poised to take on some heavy competition. By Marc Cook.
Matters of Awareness
On February 14, FAA Acting Administrator Billy Nolan issued an initiative that he called...