Free from engine noise, it's perhaps the closest humans get to bird-like flight. It rightly belongs in the adventure sports category for those seeking novel experiences. Years of evolution have made it accessible to all, both economically and in terms of learning curve, and gradually, its popularity grows.
However, many people wonder about the glider's flight mechanics - how it can cover hundreds of kilometres over several hours without touching ground, without fuel, without an engine, and without continuous propulsion!
So how does it stay airborne?
A glider constantly descends, but flying one is essentially a relentless pursuit of updrafts (thermals) while avoiding downdrafts. If the pilot (called a glider pilot) succeeds, they can remain airborne for hours!
Its wing design maintains stable flight when launched at sufficient horizontal speed. Typically, an aeroplane tows the glider to achieve initial stability. The wings harness air resistance, enabling flight even in still conditions! From there, the glider pilot takes control.
By steering the glider using a three-axis control stick, the pilot can rotate it on different axes to lose or gain altitude. This directly affects airspeed, allowing momentum for subsequent climbs. It's all about balance: The glider pilot must read the sky skilfully, as altitude is their only fuel.
Glider pilots primarily utilise updrafts created by temperature variations or terrain features.
Several types of updrafts exist:
- Thermal soaring:
- Ridge soaring:
Glider flying isn't as difficult as one might think. From age 16, you can obtain a pilot's licence after completing theoretical training and passing a medical examination (renewable biennially).
If flying is your dream but you don't aspire to become a glider pilot, you can experience the activity through trial glider flights near you!
