glider; sailplane
Aircraft designed to fly without an engine, relying on air currents. The term is technical but understood in general contexts.
His hobby is flying in the sky with a glider.
Gliders can travel long distances without using an engine.
Compound of 滑 (glide) + 翔 (soar) + 機 (machine). The exact historical derivation is uncertain, but the kanji directly reflect the function of the aircraft.