Retractable landing gear, Meaning, Synonyms, Antonyms, and Use Cases

In today’s word of the day, we’ll be looking at the phrase Retractable landing gear. Its meaning, synonyms, antonyms, and use cases.


Retractable landing gear (RLG) is a type of landing gear that streamlines the airplane by allowing the landing gear to stow inside the structure during a cruising flight.

RLG can retract the landing gear, because of this, increasing climb performance and higher cruise airspeeds because of the resulting decrease in drag.

RLG can be operated by employing a combination of two systems, which include working hydraulically and electrically. Or sideways operated either hydraulically or electrically.

  • Hydraulic: A hydraulic landing gear retraction system works with pressurized hydraulic fluid which actuates linkages to raise and lower the gear, it works with a switch that When moved to the UP position, is directed into the gear-up line.
  • Electrical: An electrical landing gear retraction system works with an electrically driven motor for its gear operation.


Undercarriage, Landing gear


Non-retractable landing gear


Dutch – Intrekbaar landingsgestel

German – Einziehbares Fahrwerk

Italian – Carrello di atterraggio retrattile

Spanish – tren de aterrizaje retráctil

Use cases

  • The airplane featured retractable landing gear, tandem-wheel main gear retracting outward into the wing, and twin-wheel nose gear.
  • After a quick survey of your aircraft the engineer could show you how much time has elapsed during flight, the status of your retractable landing gear, tandem landing gear, and throttle, a damage meter, a sea level altimeter, an airspeed indicator, and a fuel gauge.


Frequently Asked Questions

Why do planes have retractable landing gear?

The landing gear struts fold in, bringing the wheels inside the fuselage on a horizontal plane. A wider stance on the ground is made possible by inward-retracting gear like this, which results in a more solid takeoff and landing. However, it also affects the aircraft’s weight and maneuverability.


Which of the following is an advantage of retractable landing gears?

A plane’s drag is decreased via retractable landing gear, resulting in an increase in CRUISE speed and glide distance. For the commercial pilot license, you are no longer required to fly a retractable-gear aircraft, but if you do, it’s likely to be a Piper PA-28R Arrow since it’s arguably the most used retract for pilot training.


Who invented the retractable landing gear?

Retractable landing gear was invented by RetLeroy Gruman.


What is a disadvantage of a retractable landing gear?

The disadvantages of Retractable Landing Gear are its limitation to high-performance aircraft, Increased weight, and Increased cost.


Can an airplane fly without retracting its landing gears?

After takeoff, if the gears don’t retract, the aircraft can still fly, but it will have lower airspeed and cruising altitude, and ATC (Air Traffic Control) will need to be notified of the lower cruising speeds and altitudes.

Video Explanation

the video below explains RLG and how it works.



Most airplanes with retractable landing gear have a gear warning horn that will give a signal when configuring the aircraft for landing and the landing gear is not locked and down. Normally, the horn is linked to the throttle or flap position and the airspeed indicator so that when the airplane is below a certain configuration, airspeed or power setting with the gear retracted; the warning horn will raise an alarm.

Many aircraft are equipped with additional safety devices to prevent a collapse of the gear when the aircraft is on the ground, These devices are referred to as ground locks.




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