How do gliders stay up – with no engine?
Easily. Gliders stay up in the same way as any other winged aircraft. As they move forward, air flowing over the wings makes them lift upwards. It’s that “lift” that keeps gliders up. Gliders are pulled forward through the air by gravity. Just like anything on wheels will roll forward down a slope, a glider flies down a slope in the air – although it is a very shallow slope. 1 in 40 is typical.