Here are five fascinating airplane facts you might not have known, each with an intriguing reason why they exist.
1. The diameter of a B737 is the same as a B777 engine
The cabin diameter of a Boeing 737 is almost identical to the diameter of a Boeing 777 engine. The 737’s cabin measures 3.53 meters, while the 777 engine’s diameter is 3.43 meters. These massive engines deliver the powerful performance needed for intercontinental flights.
2. PAPI lights reveal an incorrect approach height
PAPI lights, or Precision Approach Path Indicators, are four lights located next to the runway that show whether a plane is at the correct approach height. If you’re flying too high, you’ll see more white lights; if you’re too low, you’ll see red lights. For a proper approach, pilots see two red and two white lights from the cockpit. These indicators are essential for safe landings, especially in poor weather conditions.
3. Jet fuel is stored in the wings of aircraft
The wings of an airplane do more than just make flying possible, they also house the fuel tanks. Fuel is stored in the wings to help balance the aircraft by keeping the weight closer to its center of gravity, enhancing both stability and efficiency during flight.
4. Winglets reduce vortices and save fuel
The small, upward-facing extensions at the ends of airplane wings, called winglets, reduce air resistance caused by vortices. This design helps save fuel and minimizes environmental impact. A smart innovation with significant benefits! There are various types of winglets, learn more about them in this blog.
5. Red and green wing lights show flight direction at night
At the wingtips, you’ll find a red light on the left and a green light on the right. These lights help pilots and observers determine whether an airplane is flying toward or away from them in the dark. A simple but highly effective navigation aid. Curious to know more? Read: What you need to know about aircraft lighting.
Smart boarding next time
The world of aviation is filled with clever designs and innovations that improve both safety and efficiency. The next time you see an airplane, you’ll know more about the brilliant engineering behind it!
By: Rico Valkenborgh | April 24, 2025
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