Understanding Stringers and How They Affect Airplanes

Airplanes are exposed to extreme stress during flight, including lift, drag, weight and thrust. Lift is an upward force generated by an airplane’s lifting surface. Drag is air resistance that counters an airplane’s forward motion. Weight is the gravitational pull … Continue reading

Why Do Some Airplanes Have Split Winglets?

Split winglets have become increasingly common. Also known as split scimitar winglets, they are found on many 737 airliners, including the 737 MAX 8, 737 MAX 9, 737 MAX 10, 737-800 and 737-900ER. Like all winglets, split winglets consist of … Continue reading

The Beginner’s Guide to Double Hex Nuts

When most people think of hex nuts, they envision a six-sided fastener with internal threading. After all, the term hex refers to objects with six sides, so conventional wisdom may lead you to believe that all hex nuts have six … Continue reading

Integral Fuel Tanks: Why Airplanes Store Fuel in Wings

It’s a common misconception that airplanes have isolated fuel tanks — similar to those found in automobiles. With the exception of certain all-electric models, most airplanes store fuel. They burn this fuel with air to power their respective engines and … Continue reading

What Are Miniature and Subminiature Bulbs?

Lighting is an important part of all modern airplanes. A typical airplane has anywhere from hundreds to thousands or even tens of thousands of individual bulbs. Some of them large, such as external navigation lights and anti-collision lights. Miniature and … Continue reading

What Are Airplane Propellers Made Of?

Propeller-driven airplanes remain a staple of the aviation industry. While most airplanes used for long-haul flights are powered by turbofans, propeller-driven airplanes still account for about two-thirds of all flights globally. Propeller-driven airplanes include those powered by piston and turboprop … Continue reading

What Is a Trip-Free Circuit Breaker?

Circuit breakers are found in nearly all modern airplanes. Not to be confused with fuses, they protect electrical equipment from overcurrent-related damage. If the current flowing through a circuit exceeds a safe amount, the circuit breaker will disrupt it. Current … Continue reading

Do Airplanes Use Tube or Tubeless Tires?

Ever wonder if airplanes use tube or tubeless tires? With the exception of specialized aircraft like seaplanes, most airplanes have tires. Small airplanes may have just three tires, whereas jumbo-sized airliners can have up to 23 tires. Tires, of course, … Continue reading

The Beginner’s Guide to Self-Locking Nutplates

Nutplates offer a simple and effective solution for blind fastener installations. Also known as plate nuts or anchor nuts, they feature a threaded nut with an anchor base. Even if you can’t access the rear side of an assembly, you … Continue reading