The Case of No Rotor RPM Indication
I am now in the flight-testing stage with my Hummingbird helicopter. Personally, I’ve always liked the 40 hours of required flight testing as it...
Plug-Gapping Tool
If you read Paul Dye’s article “Automotive Plugs in Lycomings” in the August 2023 issue, you know that using inexpensive automotive-style single-electrode spark plugs...
Matching a Tailwheel to the Terrain
The right tailwheel can keep you out of trouble in the backcountry.
AN960 Washers, the Penny and My Thoughts
Not a week (sometimes a day) went by during my Sonex career that I wasn’t asked about washer usage on threaded fasteners. Often, a...
The 13 Command(ment)s
For most people, 10 are enough. Laying out a PC board, you’ve got a few more.
Remember, now, I’m trying to show you the basics...
In Case You Missed It
Wind Tunnel
The author discusses the theory and effect of constant-speed propellers on piston-engine airplane performance, and compares fixed-pitch versus constant-speed props, effect on thrust HP and propulsion, the comprises involved in choosing a prop, how props perform in various conditions and phases of flight, how variable-pitch props work, and why a constant-speed prop is the best choice for high-performance aircraft.
Watch Those Sharp Edges
Grommets and bushings provide simple, inexpensive protection from sharp edges of all kinds.
Sometimes...
Safety Is No Accident: Canards
The appeal of canard-type designs hasn't faded, and the design was heralded as inherently safer because of its resistance to stalling. Ron Wanttaja reveals the veracity of that claim given the accident numbers.