![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")
DIY Firewall Penetration
Properly seal the firewall penetrations to keep fumes from entering the aircraft cabin.
Parallels, Stops, and Travel Limiters
Although the title might suggest it, this is not about parallel parking, speeding tickets, or driving of any kind.
Hazed Lens
Kind of hard to see any nav light or strobe light through this lens! The culprit was the failed strobe bulb, but the real...
Replacing Fuel and Oil Lines
It is a good idea to cap off the old lines and fittings as you remove each hose to avoid making a big...
In Case You Missed It
Wind Tunnel
Don your thinking caps, kids. Its time to learn about the value of nondimensionalized aerodynamic data.
One Thing Leads to Another
It started simply enough. With a mistake. OK, maybe just a misapplication of learned behavior.
Why You Should Do Engine Oil Analysis
Engine oil analysis for aircraft is an essential element of long-term powerplant health, for...
Build Your Skills: Metal, Part 2
How to meld with metal and bash rivets without blood or tears; by Dan Checkoway.