![SR-1 cowl being integrated with spinner and cooling ducts. The cowl is assembled to itself/to the fuse primarily with countersunk #8 screws. [All images credited to Eric Stewart]](https://www.kitplanes.com/wp-content/uploads/2026/09/1KP.jpg?w=534&h=462&crop=1 "Custom Cowl Fabrication: Building the SR-1 Composite Cowl")
![Trimming composites gets the full PPE job. [Credit: Eric Stewart]](https://www.kitplanes.com/wp-content/uploads/2026/07/7-2.jpg?w=265&h=198&crop=1 "A Few of My Favorite Tools")
![Lowell Farrand spent years serving as an FAA DAR and is in the EAA Hall of Fame. He offers sound advise to builders. [Credit: Bill Wilson]](https://www.kitplanes.com/wp-content/uploads/2026/05/unnamed-4.jpg?w=265&h=198&crop=1 "Think Like a Builder")
![Author Bill Wilson takes a break from measuring and cutting the Lexan windshield during his Onex build. [All Images Credit to Bill Wilson]](https://www.kitplanes.com/wp-content/uploads/2026/04/image-2.jpg?w=265&h=198&crop=1 "Think Like A Builder")
Practical Electrical
Battery facts and fables: lithium lead-acid equivalency. By Robert L. Nuckolls, III.
In Case You Missed It
Zenith CH 650 B
With the UL Power 350iS engine and other mods, the new CH 650 B has advanced Zenith Aircrafts product line. By Marc Cook.
Light Stuff
The author reviews the Kappa KP-5 LSA, imported by Kappa Aircraft from the Czech Republic. This is a conventional, low-wing, trigear configuration airplane, with a staggered seating arrangement that allows more room for each occupant, while keeping the cockpit narrow. The KP-5 is powered by a 100-horsepower Rotax 912 ULS engine and a Woodcomp three-blade prop, and has a useful load of 583 pounds. Full-power airspeed is stated as 138 mph. Avionics equipment includes a Dynon EFIS and engine monitor, Garmin GPSMAP 496 and Garmin transponder.
Good Vibrations, Bad Vibrations
Mating a prop to an engine requires more than a big wrench and some safety wire. Follow along on a real propeller vibration test.
Ask the DAR
When can a project be registered as Experimental? Can a non-complying airplane be registered as an LSA? How is the 51% criterion determined? Answers to these questions come from DAR Mel Asberry.