Gliding
Hezârfen Ahmed Çelebi was a legendary Ottoman of 17th-century Istanbul, purported to have achieved sustained unpowered flight. See attached link.
A balloon in motion is a form of unpowered flight. It is generally free-floating and moves with the wind currents.
The RFP for the X-15 was published in December 1954, with the rocket engine submitted in February 1955. The first unpowered test flight took place in June 1959, with the first powered test flight in September 1959.
A glider is an unpowered aircraft that flies by exploiting the natural forces of lift in the atmosphere. A flying machine typically refers to any aircraft that is capable of sustained flight, whether powered or unpowered. In essence, all gliders are flying machines, but not all flying machines are gliders.
That is the correct spelling of the past tense verb "coasted" (moved unpowered, glided).
Absolutely, the key is to make sure you are really using an unpowered mixer and that the signal level is correct for the power speakers (usually XLR will do fine).
Unpowered tools you can hold in one hand.
Unpowered tools you can hold in one hand.
Glider
50,671 ft (15,445 m)
Powered recliners cost from $500-1000 and unpowered recliners cost about $100-400. The price difference is a few hundred dollars.
Gliders were invented to explore the principles of flight and to provide a means for unpowered flight. They allowed early aviation pioneers to study aerodynamics and control without the complexities of powered engines. Additionally, gliders served as a platform for developing skills and techniques that would later be essential for the design and operation of powered aircraft. Their invention was crucial in advancing the understanding of flight mechanics and contributing to the evolution of aviation technology.