Four years ago, I added wingtip extensions to my homebuilt. Originally, I had built the wing 20 inches shorter than its intended span of 35 feet, intending to add the tips after flight tests. I hoped ...

Many aircraft wings have their tips turned up to reduce turbulence. I have not observed the same on wind-turbine blades – do they not experience the same problem? • The upturned tips on aircraft wings ...

Fuel consumption and greenhouse gas emissions are huge priorities in the aviation industry – passenger airliners chew through amazing quantities of fuel. Take the Boeing 747, which guzzles somewhere ...

If you missed the first part of this article series, start here. Most of us are taught early on that once the aircraft is within one-half wingspan height above the runway, we lose some drag because ...

It's common to see line-shaped clouds in the sky, known as contrails, trailing behind the engines of a jet airplane. What's not always visible is a vortex coming off of the tip of each wing--like two ...